REPORT OF THE STATE ENTOMOLOGIST I907 335 



times its greatest diameter. The other segments are sessile, 

 cylindric and in most species have a length ^ or ^ that of the 

 diameter; the number of segments may range from i6 to 22. 

 The femora are strongly swollen and the tibiae, particularly the 

 posterior pair, armed with long, setose spines which, in some 



Fig. 32. Trotteria[subfuscata n. sp., basal antennal segments, much enlarged. 

 (Original) 



forms, extend to the base of the second tarsal segment. The 

 male genitalia present a very characteristic type, differing in certain 

 resi:)ects markedly from those of other Cecidomyiidae. 



Key to species 

 a Females 



b 16 anteiinal segments; abdomen dark brown 



k a r n e r e n s i s n. sp., C. 484 



bb 20 antennal segments ; abdomen dark brown 



s u b f u s c a t a n. sp., C. 618 

 bbb 22 antennal segments 



c Claws stout; legs thickly clothed with scales. Bred from Solidago 

 s o 1 i d a g i n i s n. sp., C. ai568y 



cc Claws rather slender ; legs rather thinly clothed with scales 



c a u d a t a n. sp., C. 477 

 aa Males 



b 18 antennal segments; abdomen thickly clothed with silvery scales.. 



squamosa n. sp., C. 522 

 bb 20 antennal segments 



c 5th antennal segment with a length more than ^ its diameter . . . 

 (Choristoneura) caryae Felt, C. 334 

 cc 5th antennal segment with a length scarcely ^ its diameter 



d Abdomen silvery white ; tibiae dark fuscous orange 



a r g e n t i n. sp., C. 466 



dd Abdomen silvery yellow ; tibiae and tarsi black 



t a r s a t a n. sp., C. 667 



ddd Abdomen pale brown ; tibiae dark brown 



m e t a 1 li c a n. sp., C. 335 



DASYNEURIARIAE 



Species belonging in this tribe may be recognized by the dentate 

 claws, by the 3d vein being well separated from costa [pi. 35], 



