226 NEW YORK STATE MUSEUM 
a little longer and broader. Ovipositor, terminal lobes short, broadly 
oval. Other characters about as in the male. Type Cecid. a1362. 
Trishormomyia incisa n. sp. 
This form was taken in a trap lantern at Nassau, N. Y., July 8, 
1goo. 
Male. Length 4 mm. Antennae nearly as long as the body: 
thickly haired, pale yellowish tinged with carmine apically, yellowish 
basally; fourteen segments, the fifth with stems one and one-half 
and two and one-half times their diameters; terminal segment some- 
what produced, the distal enlargement broadly oval, irregular. 
Palpi; the first segment oval, the second moderately stout, with a 
length four times its diameter, the third as long as the second. Face 
fuscous yellowish. Mesonotum pale yellowish, irregularly tinged 
with carmine anteriorly and laterally. Scutellum fuscous yellowish 
with sparse apical setae, postscutellum a little darker. Abdomen 
pale reddish, darker basally, the segments dorsally tinged with 
fuscous; genitalia yellowish and dark carmine, thickly setose. Wings 
hyaline, costa light brown; the third vein uniting with costa beyond 
the apex. Halteres fuscous yellowish. Legs a pale straw, rather 
thickly haired; claws long, slender, evenly curved, the pulvilli rudi- 
mentary. Genitalia; basal clasp segment stout; terminal clasp 
segment long, stout; dorsal plate broad, broadly and triangularly 
emarginate, the lobes narrowly rounded; ventral plate long, narrow, 
narrowly incised. Type Cecid. 527. 
Trishormomyia dilatata n. sp. 
This species was taken in a trap lantern at Newport, N. Y., June 
27, 1906. 
Male. Length 3 mm. Antennae as long as the body, sparsely 
haired, light brown; fourteen segments, the fifth with stems one 
and one-half times their diameters; terminal segment somewhat 
produced, the distal enlargement narrowly oval. Palpi; the first 
segment subquadrate, the second somewhat produced, the third 
longer and tapering to a slender, acute apex. Face yellowish brown. 
Mesonotum pale yellowish brown with an ill-defined sublateral 
carmine spot near the base of the wings. Scutellum dark carmine, 
yellowish basally, postscutellum yellowish. Abdomen dark brown, 
darker basally, the segments margined with brownish orange. Wings 
(pl. 15, fig. 1) subhyaline, costa dark brown, the third vein uniting 
with costa beyond the margin. Coxae yellowish orange with vari- 
able carmine markings. Legs fuscous yellowish, variably tinged 
with carmine at the articulations; claws long, slender, slightly curved, 
the pulvilli rudimentary. Genitalia (pl. 18, fig. 3); basal clasp 
segment stout; terminal clasp segment long, stout, and triangularly 
emarginate; dorsal plate broad, broadly emarginate; ventral plate 
broad, broadly emarginate. Type Cecid. 407. 
