84 NEW YORK STATE MUSEUM 
Arthrocnodax sylvestris Felt 
1907 Felt, E. P. N. Y. State Mus. Bul. 110, p. 143; separate, p. 47 
(Cecidomyia) 
1908 ————— _ N.Y. State Mus. Bul. 124, p. 403 
The dark carmine male was taken September 26, 1906, at David- 
son’s River, N. C. 
Male. Length 1.25 mm. Antennae one-fourth longer than the 
body, thickly haired, brown; fourteen segments, the fifth with st ms 
two and one-half and four times their diameters, respectively. Palpi; 
the first segment short, swollen distally, the second, third and fourth 
subequal, the latter more slender than the preceding. Mesonotum 
a variable yellowish and brown, submedian lines indistinct. Scu- 
tellum and postscutellum yellowish. Abdomen dark carmine, a 
fuscous spot near the middle. Wings hyaline, costa brown; halteres 
a semitransparent salmon; femora and tibiae pale fuscous distally, 
tarsi fuscous; claws rather slender, strongly curved. Genitalia; 
basal clasp segment stout, swollen; terminal clasp segment enlarged 
basally; dorsal plate short, broad, lobes broadly rounded; ventral 
plate long, slender, broadly rounded. Type Cecid. a1630. ; 
Arthrocnodax rufa Felt 
1908 Felt, E.P. N.Y. State Mus. Bul. 124, p. 403 
This dark reddish male was taken July 24, 1906, on hickory, 
Carya, at Albany, N. Y. 
Male. Length2mm. Antennae one-fourth longer than the body, 
thickly haired, fuscous yellowish; fourteen segments, the fifth with 
stems two and one-half and three times their diameters, respectively. 
Palpi; first segment subquadrate, the second narrowly oval, with a 
length three times its diameter, the third as long as the second, 
more slender, the fourth a little longer than the third. Mesonotum 
dark brown. Scutellum dark reddish brown, postscutellum reddish 
yellow. Abdomen dark reddish, the second and third abdominal 
segments darker; genitalia fuscous yellowish. Wings hyaline, costa 
light brown; halteres semitransparent. Anterior legs nearly uniform 
dark brown, the mid and posterior legs mostly pale straw, claws 
slender, evenly curved, the pulvilli shorter than the claws. Geni- 
talia; basal clasp segment long, slender; terminal clasp segment long; 
dorsal plate long, deeply and triangularly emarginate, the lobes 
narrowly rounded; ventral plate long, broad, broadly rounded. 
Harpes indistinct. Type Cecid. 678. 
Arthrocnodax filicis Felt 
1907 Felt, E. P. N. Y. State Mus. Bul. 110, p. 136; separate, p. 35 
(Cecidomyia) 
1908) NY. uate nVitis, Setar one Aon 
This yellowish brown male was taken June 4, 1906, on fern at 
Karner, N. Y. It was also taken ina trap lantern at Nassau, N. Y. 
July oth. 
