370 XEW YORK STATE MUSEUM 



cc 2d to 4tli segments of the posterior tarsi greatly enlarged ; abdo- 

 men pale 3-ellowish, greenish dorsally ; 3d vein uniting with 

 costa just beyond the apex; antennae dark brown, the 5th seg- 

 ment with a stem >1 the length of the basal enlargement ; male 



1 a t i p e s n. sp., C. 511 

 bbbb 15 antennal segments 



c Abdomen dark reddish ; antennae dark reddish brown, the 5th seg- 

 ment with a stem 54 the length of the basal enlargement; male 

 (Oligotrophus) tsugae Felt, C. 165 

 aa 16 to 19 antennal segments 

 b 16 -antennal segments 



c Antennal segments sessile, the 5th with a length 2^ times its 

 diameter; ovipositor J^ the length of the abdomen 

 d Abdomen reddish brown, the body slender, the lobes of the 

 ovipositor with a length twice their width ; bred from 



i slender willow twigs ; female 



! c a u 1 i c o 1 a n. sp., C. ai822a 

 dd Abdomen dark brown, the body stout, the lobes of the ovi- 

 positor with a length 3^ times their width ; bred from sub- 

 globose galls on slender willow twigs 



tumidosae n. sp., C. 1300 

 cc Antennal segments with more or less of a stem 



d The 5th antennal segment with a stem J4 the length of the 

 basal enlargement, which latter has a length twice its 

 diameter ; abdomen yellowish brown ; 3d and 4th palpal seg- 

 ments equal ; bred from R i 1) e s ; female ". . . 



californica n. sp., C. 919 

 dd 5th antennal segment with a stem ^ the length of the basal 

 enlargement ; abdomen dark brown ; bred from slender wil- 

 low, twigs; male caulicola n. sp., C. ai822a 



ddd 5th antennal segment with a stem ^ the length of the basal 

 enlargement ; abdomen yellowish brown ; bred from 



R i b e s ; male californica n. sp., C. 919 



dddd 5t'h antennal segment with a stem 34 longer than the basal 

 enlargement ; abdomen fuscous ; bred from elm buds and 



folded leaves u 1 m i Beutm., C. 1239, 31683 



bb 17 antennal segments 



c 5th antennal segment with a stem ^ the length of the basal en- 

 largement ; abdomen dark brown ; bred from willow ; male 



americana n. sp., C. 920 

 bbb 18 antennal segments 



c 5th antennal segment with a stem j^ the length of the basal en- 

 largement 



d Abdomen reddish brown; bred from wheat stems; male 



(C c c i d o m y i a) destructor Say, C. 771, 772 

 bbbb 19 antennal segments 



c Abdomen reddish brown ; 5th antennal segment with a length 3 

 times its diameter; ovipositor J4 the length of the abdomen, the 

 lobe with a length twice its width; bred from wheat stems; 

 female (Cecidomyia) destructor Say, C. 771 



