392 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 2 



row, dark purplish, fusiform vein swelling, 8 mm. long, on the under 

 side of oak leaves. Male 2 mm. long. Abdomen a variable reddish 

 or dark brown ; scutellum dark brown ; wings small, relatively short 

 and broad ; fifth antennal segment with a length nearly four times 

 its diameter and 7 or 8 circumfili. Female 2.5 mm. long. Abdomen 

 mostly dark brown, the fifth antennal segment with a length four 

 times its diameter and four anastomosing circumfili. Type Cecid. 

 al788. 



Caryomijia} antennata n. sp. was reared in the spring of 1909 

 from a yellowish green or brown, subglobular, thick-walled hickory 

 leaf gall, 4 to 5 mm. in diameter. Male 3 mm. long. Abdomen deep 

 reddish orange, the fifth antennal segment binodose, the nodes sep- 

 arated by distinct stems ; dorsal plate broad, narrowly emarginate, 

 the lobes rounded. Female 4 mm. long, the fifth antennal segment 

 with a length three and one half times its diameter, the larval breast- 

 bone unidentate. Type Cecid. al944. 



Caryomyia consotrina n. sp. was reared in April and May, 1909, 

 from a small, depressed, globular, yellowish green or brownish, thin- 

 walled hickory leaf gall 2 mm. in diameter. Male 2 mm. long. Ab- 

 domen fuscous yellowish; fifth antennal segment binodose, the nodes 

 separated by distinct stems ; ventral plate broadly and roundly 

 emarginate. Female 3 mm. long. Abdomen brownish orange, the 

 fifth antennal segment with a length three and one half times its 

 diameter, larval breastbone unidentate. Type Cecid. al948. 



Caryomyia similis n. sp. was reared the latter part of April and 

 early in May from a thin-walled, subglobular, slightly nippled hickory 

 leaf gall 2 to 3 mm. in diameter. Male 1.75 mm. long. Abdomen 

 reddish orange ; wings short and broad ; fifth antennal segment cyl- 

 indric, with a length twice its diameter. Female 2.75 mm. long, 

 the fifth antennal segment with a length three and one half times its 

 diameter, the larval breastbone unidentate. Type Cecid. al946. 



Caryomyia inanis n. sp. was reared April 29, 1909, from an irreg- 

 ular, subglobular, thin-walled hickory leaf gall, 2 to 3 mm. in 

 diameter, and easily recognized by the more or less complete false 

 chamber at the tip of the gall. Female 3 mm. long. Abdomen deep 



^Caryomyia n. g. This geuiis is allied to Hormomyia, but differs therefrom 

 by the thorax not being greatly produced over the head. There are never more 

 than 14 antennal segments. The flagellate antennal segments of the male are 

 invariably ornamented with three low, stout circumfili and may be binodose.. 

 Those of the female are cylindric and provided with but two circumfili. 

 The wings are relatively broad, the third vein uniting with the margin at or 

 near the apex. Type Cecidomyia tuMcola O. S. There is but one generation 

 annually, the adults issuing direct from the galls. 



