394 NEW YORK STATE MUSEUAI 



cc Abdomen dark brown or brownish black 



d The Sth antennal segment with the basal portion of the stem 

 having a length equal to its diameter, the distal portion of 

 the stem with a length 3 times its diameter ; the 4th palpal 



segment yj longer than the 3d. Bred from Negundo 



' n e g u n d i f o 1 i a n. sp., C. 967 



dd The 5th antennal segment with the 2 portions of the stem 



having a length 14 greater than the diameter; the 4th palpal 



segment J-< longer than the 3d. Bred from melon tip 



s e t i g e r a Lintn. 



ddd The 5th antennal segment with the 2 parts of the stem 



having a length 2]^ times greater than the diameter ; the 



4th palpal segment twice the length of the preceding. 



Probably bred from Fraxinus 



canadensis n. sp., C. 1027 



DICHR0DIPL0SI8 Kicff. 



A few somewhat diverse species have been referred to this genus 

 because the^ have all the claws unidentate. It is probable that 

 several forms at least are not cogeneric with the type of the above 

 named genus. 



Key to species 

 a Abdomen fuscous yellowish, length 1.25 mm; fifth antennal segment having 

 the stems with a length 3^ and 4^ times their diameters; palpi quadri- 



articulate ; bred from a subglobular leaf gall on poplar 



p o p u 1 i n. sp., C. ai743 

 (7a Abdomen reddish brown 



b Fifth antennal segment having the stems with a length 2 and 3!>^ 



times their diameters ; length 1.5 mm. ...androgynes n. sp., C. 6 



bb Fifth antennal segment having the stems very short, the basal stem with 



a length only about 1,4 its diameter 



c Antennal swellings elongate, coalescing; length 1.5 mm; probably bred 



from oak leaves (C e c i d o m y i a) q u e r c i n a Felt, C. 1006 



cc Antennal swellings stout, well separated, length 1.5 mm. 



(C e c i d o ni y i a) m u 1 t i f i 1 a Felt, C. 1024 



BREMiA Rond. 

 This genus, like Aphidoletes, has the antennal setae and hairs 

 greatly prolonged on the dorsal face. The male may be distin- 

 guished from all other Cecidomyiidae known to tts by the low 

 rudimentary circumfilum occurring on the base of the distal en- 

 largement of the antennal segments [fig. 44]. The pulvilli are 

 very short or rudimentary, the anterior claws only being uniden- 



' Possibly the same as C ec i d o m yi a negundinis Gill. 



