|Publication Type:||Journal Article|
|Year of Publication:||1940|
|Full Text|| |
The following text is generated from uncorrected OCR.
[Begin Page: Page 243]
li, '40] ENTOMOLOGICAL NEWS 243
New Mycetophilidae from North Carolina (Diptera).
By ELIZABETH G. FISHER, Academy of Natural Sciences of
Dr. B. B. Fulton 1 of the North Carolina State College has
reared three new species of Mycetophilidae, the first from webspinning
larvae, the second from luminous larvae, the third
from pupae found in rotten wood. Since he hopes to publish
a detailed account of the life histories it seems well to publish
descriptions of the adults at this time.
I wish to thank Dr. O. A. Johannson for the loan of his
Pennsylvania "Ceroplatus bcllulus", Dr. F. W. Edwards for
information about Williston's type and Mr. B. B. Fulton for
the privilege of retaining the types of the new species.
Ceroplatus (Cerotelion) johannseni new species.
This species is conspecific with Johannsen's Pennsylvania
specimen of Ceroplatus bellulus 2 nee Williston 3 . Williston's
type from Mexico belongs to the subgenus Euccroplatus 4 .
These specimens belong to the subgenus Cerotelion; the tibial
setulae are irregularly arranged, the face is broad, the spurs
are black, the eyes are emarginate and the ocelli are removed
from the eye margins by about the width of an ocellus.
The specimens of this species are quite variable in color and
in size, as seems to be true of other species of this genus.
The North Carolina males are predominately brown and yellow,
the females black (Fulton reared them together). A Connecticut
male and female (in copula) are both predominately
brown and yellow. Another Connecticut male and an Iowa male
differ in having black abdomens approaching the North Carolina
females in color. Structually they are alike as far as I am able
to find. The male terminalia are all alike and resemble somewhat
Ceroplatus (Cerotelion) lineatus Fabricius. The wings
have no brown marks. The North Carolina females of this
a j. Elisha Mitchell Society 55 : 289-293, pi. 27. 1939.
2 Maine Agr. Exp. Sta. Bull. 172: 240. 1909.
3 Biol Centr. Amer. Dipt. 1 : 219. 1900. Maine Agr. Exp. Sta. Bull.
172: 239. 1909.
4 Proc. Linn. Soc. N. S. Wales 54 (3) : 174. 1929.
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244 ENTOMOLOGICAL NEWS [Nov., '40
species apparently resemble Cero plains (Ccroplatus) carbonarius
Bosc in coloration, but lack the prominent wing spots, lack the
white at the tips of the antennae, possess stripes on the mesonotal
disk, and R 4 ends in C not RI.
$ : Total length 7 mm. ; wing 4 mm. Head black above,
face and mouthparts yellow. Thorax yellow ; mesonotum with
a median triangular brown stripe which is divided by a
median yellow line anteriorly, the apex of the triangle is
directed posteriorly where it becomes obsolete before the scutellum.
Lateral mesonotal stripes darker, not reaching the anterior
margin and leaving the humeral angles yellow, widened posteriorly
above the wing bases so that a yellow V-shaped line is
left between the lateral and median stripes. Scutellum yellow.
Pleura yellow, pleurotergites, postnotum and hypopleurites
brownish. Halteres with the knob black and the stalk yellow.
Legs yellow, the bases of the middle and hind femora slightly
brownish. Abdomen brown with the bases of the segments
broadly yellow. Posterior portion of the pronotum and the
propleura with setae. Anterior spiracular membrane without
setae. Dorso-anterior angle of the anepisternite with fine setae.
Wings hyaline. C extends one-third the distance between the
tips of Rs and M 1+L ; Sc ends in C at the level of the end of
the basal cell ; Sc^ absent ; R 4 ends in C ; R 4 short and only
slightly oblique; R 4 origin at the level of the tip of RI ; stalk
of M one and a half to twice as long as the coalesced portion
of M with Rs ; anal vein reaches the wing margin.
A male specimen from Iowa differs in being smaller and
darker in color. Total length 5mm. Mesonotum brownish
yellow with black stripes. Pleura dark brown. Scutellum and
postnotum black; setae black. Stalk of halteres whitish, knob
black. Legs whitish yellow ; tips of the middle and hind coxae
blackish and the bases of the middle and hind femora blackish.
Abdomen black; setae black.
A Connecticut male also has a black abdomen, another has
the abdomen brown with the bases of the third, fourth and
fifth segments yellow.
9 : Total length 5.75 to 9 mm. Head black above, face and
palpi yellow. Antennae black, Thorax mainly black; mesonotum
yellow with lateral black stripes abbreviated anteriorly and
a median black triangle with its apex directed posteriorly but
not reaching the scutellum. Scutellum black. Pleura and
postnotum black. Abdomen black.
[Begin Page: Page 245]
li, '40] ENTOMOLOGICAL NEWS 245
The Connecticut female differs in having a brown thorax
Holotypc : $ ; Raleigh, Wake County, NORTH CAROLINA.
Reared from larva by B. B. Fulton; adult emerged April 25.
[Acad. Nat. Sci. Phila. No. 6488J.
Allotypc : $ ; ten miles north of Southport, Brunswick
County, NORTH CAROLINA. Reared from larva by B. B.
Fulton ; adult emerged April 1 1 .
Paratypes: 1 $ ; ten miles north of Southport, Brunswick
County, NORTH CAROLINA; reared April 24 (B. B. Fulton).
29 ; Raleigh, Wake Co., North Carolina; reared April 25
(B. B. Fulton). 1 $ ; Black Mts., Buncombe and Yancy
Counties, North Carolina (W. G. Deitz). 1 $ ; Pottstown
Montgomery County, PENNSYLVANIA (C. W. Johnson)
[Johannsen Collection]. 2$ ; 1$ ; Redding, Fairfield County,
CONNECTICUT, June 10-26 (A. L. Melander). 1 $ ; Muscatine
County, IOWA, August 28, (B. Berger).
Platyura (Rutylapa) fultoni new species.
This species runs to Platyura gcnualis Joh. in Johannsen's
key" 1 but differs in terminalial structure. I place this species
in the subgenus Rutylapa, although it lacks the posterior
spiracular hairs, because it agrees in the other characters of the
$ : Total length 5 mm. Head brown, deep black about the
three ocelli, face yellow; palpi dark brown, the remainder of
the mouthparts yellow. Thorax light yellow; mesonotum
brownish yellow with two narrow stripes arising at the ends of
the rudimentary transverse suture, uniting behind and obsolete
before reaching the scutellum ; lateral stripes broad, obsolete
anteriorly leaving the humeral angles yellow. Mesonotum uniformly
setose. Scutellum with its margin broadly black. Pleura
with two prominant brown spots, one on the anepisternite, tinother
on the pleurotergite. Anepisternite with minute sei .itabove.
No spiracular setae. Postnotum yellow; its dorsal
surface brown and setose.
Wings with a central spot and the tips dusky. C extends
half way to M 1+2 , Sc ends in C over the origin of Rs, ba^- ot
Rs faint, RI arises under the tip of Rs, Rs and M fusnl f..r
approximately one-half the length of the stalk of M.
~~ F Maine Agr. Exp. Sta. Hull. 172: 250. 1909.
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246 ENTOMOLOGICAL NEWS [Nov., '40
Tibial spurs 1-2-2. Abdominal tergite one brown, second,
third, and fourth with the basal half to two-thirds yellow and
the distal portion brown, the remainder of the abdomen black.
The male terminalia with simple styles unevenly bifurcate at
their tips. Legs yellow ; trochanters with black spots below on
the meso- and metathoracic legs and brown on the prothoracic
legs. Meso- and metafemora dusky above.
$ : Differs from the male in having R 4 slightly shorter,
in having the central wing spot reaching into the fork of M.
Abdomen a dusky yellow with narrower greyish posterior
Holotypc : $ ; Glenville, Jackson County, NORTH CAROLINA;
June 10. (B. B. Fulton). [Acad. Nat. Sci. Phila. No.
Allotype: 5 ; Glenville, Jackson County, NORTH CAROLINA;
June 13. (B. B. Fulton).
Paratypes : 6 $ ; Glenville, Jackson County, North Carolina;
June 10-14 (B. B. Fulton). 3$ ; same locality, June
16-19 (B. B. Fulton). 2$ ; Lewis Falls, Shenandoah National
Park, VIRGINIA, July 4 (A. L. Melander).
Phthinia Carolina new species.
This species is close to Phthinia catawbiensis Shaw and
Phthinia tanypus Loew. It differs in having vein C hardly
extended beyond the tip of Rs, in having the Cu fork almost
under the M fork.
S : Total length 7 mm. ; wing 4.5 mm. ; fore tibia 1.70 mm.,
fore basitarsus 3.80 mm. Head black; face and mouthparts
brown. Antennae deep brown except the scape and the base
of the flagellum which are yellow. Thorax brown ; mesonotum
with black vittae.
Wings hyaline, the apex with macrotrichia on the membrane.
C hardly extended beyond the tip of Rs ; Sc ends in C before
the level of the origin of Rs; Sc 2 just before the middle of
Sc ; stalk of M subequal to r-m ; Cu fork practically under the
M fork; Cuo sinuate. Halteres yellow, knob brownish black.
Legs yellow. Tibial spurs 1-2-2. Abdomen black, bases of
segments especially ventrally brown. Each style of male
terminalia with two unequal spines as in Phthinia catawbiensis
Shaw but with the mesally directed slightly sclerotized lobe
more compact, broader and almost triangular.
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li, '40] ENTOMOLOGICAL NEWS 247
9 : Similar to the male. Fore tibia 1.80 mm., fore basitarsus
Holotype : $ ; Raleigh, Wake County, NORTH CAROLINA ;
April 4. (B. B. Fulton). [Acad. Nat. Sci. Phila. No. 6490].
Allotype: $ ; Raleigh, Wake County, NORTH CAROLINA;
April 6. (B. B. Fulton).
Some Neotropical Syrphid Flies (Diptera).
By FRANK M. HULL, University of Mississippi.
This paper presents descriptions of some species of neotropical
Syrphids that have been received from several sources.
The author is indebted to Mr. J. Lane of Sao Paulo, Brazil,
for the privilege of studying many interesting South American
species, two of which are described here. Unless otherwise
stated, types are in the author's collection.
Microdon hondurania n. sp.
$. Length 5.5 mm.; antennae 1.5 mm. Head: eyes not
approximated above, without pile and the front barely narrower
than the parallel-sided face, both of which are broad. Front
and upper part of occiput, except the posterior margin along
the dorsum, shining dark brown. Face and cheeks pale shining
yellow and a pair of similarly colored rectangular spots placed
transversely across the middle of the front, barely separated
in the middle. Pile of the face and lower part of occiput and
the extreme posterior margin of the upper part of the occiput
pale yellow. Antennae black, the third joint a little more than
twice as long as the first joint.
Thorax : widely dark shining brown over the mesonotum,
except narrowly along the sides and for a short distance upon
the anterior margin inside of the humeri. The broad, dark
central area! with faint narrow violaceous vittae. Pleurae and
the lateral margin of the mesonotum, the humeri and the
scutellum light yellowish brown, the disc of the scutcllum
slightly darker, ' its extremely blunt, closely approximated
nodulate spines blackish.
Abdomen: short and broad, the whole of the first segment
and whole of the second, except for an obscure lateral brown
spot, light brownish yellow. The third segment extensively
dark brown, its posterior margin narrowly light yellow, c-xt ending
broadly forward in the middle but not bisecting the anterior
New Mycetophilidae from North Carolina (Diptera)