224 NEW YORK STATE MUSEUM 
Trishormomyia johnsont Felt 
1907 Felt, E. P. New Species of Cecidomyiidae II, p. 18-19 (Hormomyia) 
1908 ————— N. Y. State Mus. Bul. 124, p. 299-300, 388 (Hormomyia) 
This species was taken at Auburndale, Mass., May 28, 1906 by 
Prof. C. W. Johnson. 
Male. Length 5mm. Antennae extending to the fourth abdom- 
inal segment, Sees haired, dark brown; fourteen segments, the 
; fifth (fig. 47) with stems one and one- 
fourth and three-fourths times their 
diameters; terminal segment produced, 
the distal portion of the stem with a 
small subglobular enlargement.  Cir- 
cumfila, especially on the distal enlarge- 
ment, very irregular. Palpi; the first 
segment short, subrectangular, the second 
about as long as the third, the third more 
than twice the length of the second, more 
slender. Face, dark reddish brown. -Mes- 
onotum dark brown, the submedian lines 
narrow, fuscous yellowish. Scutellum 
brown, reddish apically and laterally, 
postscutellum dark brown, reddish apic- 
ally. Abdomen sparsely haired, shining 
black. Genitalia reddish brown, the term- 
inal clasp segment distally, black. Wings 
hie |) pl 14) ig." 3) hyaline. costal'reddish 
_ Fig. 47 | Trishormomyia rown, the third vein just beyond the 
johnsoni, sixth antennal seg- apex. Halteres pale reddish yellow ba- 
ment of male, only one seta sally, slightly fuscous apically. Legs a 
sketched in (enlarged, orig- variable fuscous yellowish, the distal tarsal 
inal) segments darker. Genitalia; basal clasp 
segment long, slender, a quadrate lobe at 
the basal third; terminal clasp segment long, stout; dorsal plate short, 
broad, deeply and broadly incised, the lobes broadly rounded: ventral 
plate spatulate apically, broadly rounded laterally, truncate distally. 
Type Cecid. 821. 

Trishormomyia crataegifolia Felt 
1907 Felt, E. P. N. Y. State Mus. Bul. rro, p. 160 (Hormomyia) 
1908 ————— N. Y. State Mus. Bul. 124, p. 388 (Hormomyia) 
1908 Jarvis, T.D. Ent. Soc. Ont., 38th Rep’t, p. 86 (Hormomyia) 
1909 Felt, E. P. Ent. Soc. Ont., 39th Rep’t, p. 45 (Hormomyia) 
1909 Jarvis, T. D. Ent. Soc. Ont., 39th Rep’t, p. 83 (Hormomyia) 
1915 Felt, E.P. N.Y. State Mus. Bul. 175, pl. 3, fig. 8 (Hormomyia) 
1918 ————— N.Y. State Mus. Bul. 200, p. 136 (Hormomyia) 
This species was reared in early April 1907 from deep-red larvae 
which deserted cockscomb galls on crataegus leaves the preceding 
