REPORT OF THE STATE ENTOMOLOGIST IQ/I3 89 



the vicinity of Albany, N. Y., has been taken by Miss Cora H. 

 Clarke at Magnolia, Mass., is listed from Ontario, Canada, by Jarvis 

 and is presumably widely distributed. 



In early August the yellowish larvae may be found in cylindric, 

 brown, hard cells 4 to 5 mm long and 1.5 mm in diameter. These 

 cells are evidently in or near the center of a leaf bud and are sur- 

 rounded by softer, green tissue from which they may frequently 

 be drawn in part at least. The infestation by this midge results in 

 dwarfing the buds and surrounding tissues, thus producing the 

 characteristic " wheat-ear " deformity. The developing gall may 

 be readily detected by the thick cluster of small leaves. The insect 

 winters in the gall, the midges appearing in early spring. Several 

 parasites have been reared from this deformity, E u p e 1 m u s 

 dryorhizoxeni Ashm., Platygaster obscuri- 

 p e n n i s Ashm., Polynema striaticornis Girault and 

 species of Polygnotus and Torymus. 



Gall. The gall of this species is an irregular enlargement 1 to 

 nearly 3 cm long and about 6 mm in diameter. It is evidently 

 caused by the dwarfing of a number of adjacent buds and presents 

 a remote resemblance to a head of wheat. See plates 13, 14. 



Larva. Length 2 mm, stout, whitish or yellowish white; breast- 

 bone bidentate, the shaft obscure. 



Male. Length 2 mm. Antennae two-thirds the length of the 

 body, light brown; ij segments, the fifth with a stem about 2 /z the 

 length of the enlargement. Palpi; the first segment short, stout, 

 second broader, almost oval, the third more slender, the fourth 

 one-fourth longer. Head dark brown. Mesonotum dark brown, 

 sublateral lines ornamented with yellowish white hairs. Scutellum, 

 postscutellum and abdomen dark brown, the latter rather thickly 

 clothed with yellowish hairs and with silvery reflections laterally. 

 Wings hyaline, tinged with reddish about the base; costa dark 

 brown; halteres yellowish transparent at base, fuscous apically. 

 Legs light brown, silvery ventrally, tarsi darker; claws slender. 

 Genitalia; basal clasp segment stout, terminal clasp segment broad 

 at base. Dorsal plate broad, deeply emarginate ; ventral plate broad, 

 broadly emarginate. Harpes stout, with a stout, quadrate and a 

 subconical tooth distally. 



Female. Length 2.5 mm. Antennae about one-half the length 

 of the body, light brown; 17 segments, the fifth nearly cylindric, 

 sessile. Palpi; first segment slightly elongate, expanded distally, 

 second suboval, third slightly fusiform and a 'little longer, fourth 

 more slender and one-fourth longer. Head dark brown. Mesono- 

 tum dark brown, submedian lines ornamented with yellowish white 

 hairs. Scutellum reddish brown, postscutellum lighter. Ovipositor 

 long, acutely rounded. Cecid. auoi. 



