go NEW YORK STATE MUSEUM 
Arthrocnodax cincta Felt 
1907 Felt, E. P. N. Y. State Mus. Bul. 110, p. 143; separate, p. 47 
(Cecidomyia) 
This yellowish brown male was taken June 13, 1906 at Albany, 
NY. 
Male. Length 1 mm. Antennae a little longer than the body, 
rather thickly clothed with fine hairs, dark brown; fourteen segments, 
the fifth with stems very short, each one and one-fourth times its 
diameter; terminal segment, the distal enlargement greatly pro- 
duced, subcylindric, narrowly rounded. Palpi; the first segment 
presumably short, subquadrate, the second, third and fourth, each 
narrowly oval, subcylindric. _Mesonotum nearly uniform dark 
brown. Scutellum dark reddish, postscutellum yellowish brown. 
Abdomen with the basal segments yellowish brown, the third and 
fourth black, fifth and sixth pale orange, terminal segments black. 
Wings (pl. 16, fig. 9) hyaline, costa dark brown; halteres yellowish 
transparent. Legs nearly uniform pale straw; claws long, slender, 
rather strongly curved basally. Genitalia; basal clasp segment long, 
a broadly rounded lobe at the basal third; terminal clasp segment 
greatly swollen at the base; dorsal plate broad, deeply and narrowly 
incised, the lobes broadly and narrowly rounded; ventral plate long, 
narrow, narrowly rounded. Type Cecid. 285. 
Arthrocnodax carolina Felt 
1913 Felt, E. P. Econ. Ent. Jour., 6:488-89 
1914. ——————._ Econ. Ent. Jour:, 7:458 
1914 McGregor, E. A. Econ. Ent. Jour., 7:330 
1918 Felt, E.P. N.Y. State Mus. Bul. 200, p. 17 
The midges were reared from red spider on cotton by E. A. 
McGregor and are easily separated from the western A. occi- 
dentalis Felt by the shorter stems of the flagellate antennal 
segments and the rounded ventral plate. The larvae feed upon the 
eggs of the red spider and the species is ranked as one of the important 
natural enemies of red spider on cotton. Aphanogamus 
floridanus Ashm. is a very effective parasite of this midge. 
Arthrocnodax rhoina Felt 
1908 Felt, E.P. N. Y. State Mus. Bul. 124, p. 404 
1918 ————— N. Y. State Mus. Bul. 200, p: 159 
The pale yellowish male was reared August 27, 1907 from heads 
of curled sumac, Rhus, leaves taken at Albany, N. Y. 
Gall. Reared from heads of stunted, irregularly curled leaves of 
sumac. 
Male. Length .5 mm. Antennae a little longer than the body, 
Sparsely haired, pale yellowish; fourteen segments, the fifth with 
