90 NEW YORK STATE MUSEUM 



Arthrocnodax cincta Felt 



. 1907 Felt, E. P. N. Y. State Mvts. Bui. no, p. 143; separate, p. 47 

 (Cecidomyia) 



This yellowish brown male was taken June 13, 1906 at Albany, 

 N. Y. 



Male. Length i nun. 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 (pi. 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. 



Ardirocnodax 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 

 191 8 Felt, E. P. N. Y. State Mus. Bui. 200, p. 17 



The midges were reared from red spider on cotton by E. A, 

 McGregor and are easily separated from the western A. o c c i - 

 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 Aslim. is a very effective parasite of this midge, 



Arthrocnodax rhoina Felt 

 1908 Felt, E. P. N. Y. State Mus. Bui. 124, p. 404 

 1 91 8 N. Y. State Mus. Bui. 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 



