186 The Ottawa Naturalist. [March 



plate deeply cleft and triangularly emarginate. The ovipositor 

 is short. Anterior claws unidentate. 



C. rosivora Coq. The larvae lie just under the sepals of rose 

 buds, usually singly, though sometimes in clusters of five or six. 

 Described as Diplosis. 



C. caulicola Coq. The larvae are rather abundant in the 

 basal portion of the stems of Iceland poppies. Described as 

 Diplosis. 



Caryomyia Felt. 



Allied to Hormomyia but differing by the thorax not being 

 greatly produced over the head and by the presence of but 14 

 antennal segments. The males may have the flagellate antennal 

 segments binodose or cylindric and subsessile and invariably 

 with three low 7 , stout circumfili. The antennal segments of the 

 female are cylindric and with two circumfili; palpi tri- or quadri- 

 articulate; wings rather broad, the third vein joining costa at 

 or near the wing apex; claws simple, the pulvilli well developed. 

 The ovipositor of the female is short, triangular and with minute 

 lobes apically. This genus appears to be confined to hickory 

 leaf galls. 



C. caryae O.S. Gall globose, thin-walled, yellowish green 

 or brown; diameter .1 inch, on hickory leaf. Referred to Dip- 

 losis, Cecidomyia and Hormomyia . 



C. holotricha O.S. Gall small, globular, fuzzv, rust red; 

 diameter .1 to 1-5 inch, on hickory. Referred to Cecidomyia 

 and Hormomyia. 



C. sanguinolenta O.S. Gall conical, with a distinct nipple, 

 greenish and variably tinged with purplish or blood red, on 

 hickory leaves. Described as Cecidomyia. 



C. tubicola O.S. Gall a green or blackish, hollow tube about 

 1-5 of an inch long, growing at right angles from a socket in 

 hickory leaves. Referred to Cecidomyia and Hormomyia. 



C. persicoides Beutm. Gall irregular, monothalamous, 

 hairy, \ inch in diameter and usually clustered on the midrib of 

 a hickory leaf. Described as Cecidomyia. 



Most of the other hickory leaf galls described are probably 

 made by a species of Caryomyia, though other midges have 

 been reared from these deformities. 



Hormomyia H. Lw. 



Typical members of this genus may be most easily recognized 

 by the mesonotum being greatly produced over the head. The 

 antennal segments vary in number from 14 to over 20, the 

 flagellate ones in the male binodose and with short circumfili; 

 palpi uni- to tri- or quadriarticulate. The large forms probably 

 live on sedges. 



