940 CHARLES PauL ALEXANDER 
moderately large; apical point elongated, slender; ventral cutting edge with three flattened 
teeth, gradually smaller from outermost toward base; outermost tooth flattened, a little 
enlarged distally, about as long as apical point; basal tooth small, acute; a prosthecal append- 
age with a brush of hairs beneath it. 
Pupa.— Length of cast pupal skin, about 5.5 mm. 
Cephalic crest of two prominent Icbes, blunt at tips, their surface granulated. Labial 
lobes blunt at tips. Sheaths of maxillary palpi moderately stout, tapering suddenly to sharp 
apices. Antenna with basal segment very angulated. Pronotal breathing horns (Plate 
TL XXYVI, 408 and 409) massive, short, trumpet-shaped, flattened laterally, and here margined 
with an elevated ridge, along which are scattered the rows of breathing pores; mouth of this 
trumpet wide. On thorax between breathing horns, large, rounded lobes which are minutely 
granulated. Declivity of mesonotum (Plate LX XVI, 407) somewhat precipitous, at the 
rather narrow crest with about six small tubercles which are densely beset with spicules; 
along shoulder a similar, but more elongate, transverse welt; lateral margin of thorax before 
wing root projecting out as a.sharp angle with a seta at its base. Wing sheaths reaching 
end of second abdominal segment. Leg sheaths moderately long, attaining base of fourth 
abdominal segment; fore legs a very little longer than hind iegs; middle legs much shorter, 
ending just beyond base of last tarsal segment of fore legs. 
Abdominal segments divided into two narrow basal rings and a much broader posterior 
annulus. Armatureofabdomen very weak. Male cauda (Plate LX XVI, 410 and 411) small, 
elongate; ventral lobes a little longer than the short, blunt dorsal lobes; on dorsal face near 
end of eighth segment, two stout lobes pointed at the tips which are directed dorsad and 
slightly caudad; eighth segment with a close pentagon of pale, slender lobes, the posterior 
pair larger and closer together than the anterior pair, the median lobe the smallest. 
Nepionotype.— Sacandaga River, Fulton County, New York, June 5, 1914. 
Neanotype.— With type larva. 
Paratypes.— Two larvae with type. 
(Subgenus Gonomyia Meigen) 
Gonomyia (Gonomyia) sulphurella O. §8. 
1859 Gonomyia sulphurella O.S. Proc. Acad. Nat. Sci. Phila., p. 230. 
1869 Goniomyia sulphurella O.S. Mon. Dipt. N. Amer., part 4, p. 180-181. - 
Gonomyia sulphurella is a handsome little crane-fly which is ver 
common and widely distributed thruout the eastern and central Unite 
States. Larvae are not infrequent in mud along the banks of streams. 
The writer has bred this species from larvae sifted from sandy mud fro 
the banks of Cascadilla Pond, Ithaca, New York, where they oce 
associated with numerous larvae and pupae of a tabanid (Chrysops ind 
O.$.), a stratiomyiid (Odontomyza sp.), and other forms. Larvae collecte 
on May 14, 1913, emerged as adults on June 1. Adults have been reare 
as late as October 19 by E. A. Richmond. 
