REPORT OF THE STATE ENTOMOLOGIST IQH 200. 



Larva. Length 3 mm, dark orange. Head small; antennae long, 

 tapering; breastbone bidentate, with a minute, median tooth, the 

 shaft broad, heavily chitinized. Skin coarsely shagreened; pos- 

 terior extremity broadly rounded. 



Male. Length 1.75 mm. Antennae extending to the fourth 

 abdominal segment, sparsely haired, dark brown; 16 segments, 

 the fifth with a stem one-third the length of the basal enlargement, 

 which latter has a length one-half greater than its diameter; terminal 

 segment produced, with a length thrice its diameter, tapering, 

 rounded apically. Palpi; first segment short, stout, the second with 

 a length twice its diameter, narrowly oval, the third one-third 

 longer, more slender, the fourth a little longer and more slender 

 than the third. Mesonotum dark brown, the submedian lines thickly 

 haired. Scutellum dark brown, postscutellum fuscous yellowish. 

 Abdomen dark reddish brown, sparsely haired. Genitalia dark 

 brown. Wings hyaline, costa yellowish, the third vein just before 

 the apex. Halteres fuscous, reddish apically. Legs tinged with 

 reddish and thickly clothed with silvery scales. Genitalia; basal 

 clasp segment long, broad; terminal clasp segment long, stout; 

 dorsal plate long, broad, deeply and triangularly incised; ventral 

 plate long, broad, deeply and roundly emarginate. Harpes short, 

 stout, truncate, with an irregular, quadrate tooth apically. 



Female. Length 3 mm. Antennae extending to the third 

 abdominal segment, sparsely haired, light brown, yellowish basally; 

 16 segments, the fifth with a length two and one-half times its 

 diameter; terminal segment produced, with a length four times 

 its diameter, constricted near the distal third. Palpi; first segment 

 short, stout, irregular, the second with a length nearly three times 

 its diameter, narrowly oval, the third one-half longer, more slender, 

 the fourth a little longer and more slender than the third. Face 

 fuscous yellowish. Mesonotum reddish brown, the submedian 

 lines thickly haired. Scutellum reddish orange, postscutellum 

 orange. Abdomen reddish brown; membrane and pleurae deep 

 orange. Ovipositor fuscous yellowish. Halteres light fuscous yellow- 

 ish. Coxae and base of femora fuscous yellowish; femora distally, 

 tibiae and tarsi dark brown, the latter almost black; claws rather 

 short, stout, strongly curved, the pulvilli longer than the claws. 

 Ovipositor about half the length of the abdomen, stout, the terminal 

 lobes narrowly oval. Type Cecid. ai82 2a. 



Phytophaga tumidosae Felt 

 1908 Felt, E. P. N. Y. State Mus. Bui. 124, p. 370 (Mayetiola) 

 This dark brown species was reared from a subglobular gall on 



willow, Salix, April 11, 1908. It was taken by Mr L. H. Weld at 



Evans ton, 111. 



Gall. Diameter, 4 mm subglobular, inhabited by a dark orange 

 larva invariably occurring just below the bud. The bark covering 

 the deformity is more or less ruptured and scarred. The infested 



