4IO NEW YORK STATE MUSEUM 



c Wings medium, with a length 2^ times the width; bred from 



Eupatorium ageratoides 



(C e c i d o m y i a) e u p a t o r i i , C. ai28o 

 ee Wings broad, with a length 2j/^ times the width ; bred from plane 



(Platanus leaf) p 1 a t a n i f o 1 i a n. sp., C. ai669a 



ddd Abdomen reddish apically, the 5th antennal segment having the 

 stems with a length 35^ times their diameters, the distal node 



with a length ^4 greater than its diameter 



(Cecidomyia) asteris Felt, C 615 

 dddd Abdomen red tinted, the 5th antennal segment having the stems 

 with a length 3^ times their diameters 

 e Wings moderate, with a length 2^ times the width ; bred from 



Rumex r u m i c i s n. sp., C, ai595a 



ee Wings rather narrow, with a length 2^ times the width ; bred 



from thickened leaf fold on Spiraea tomentosa 



spiraeafolia n. sp., C. 760 (aii74) 



ddddd Abdomen brown tinted, the 5th antennal segment having the 



stems with a length thrice the diameters, the distal node with a 



length greater than its diameter ; bred from Solidago 



(Cecidomyia) triangularis Felt, C. 76^ (aiiyo) 

 cc Abdomen dark red, the tarsi faintly banded 



d Fifth antennal segment having the stems with a length 2^ times 



the diameters ; bred from rolled milkweed leaf 



asclepiae n. sp., C. ai588a 

 dd Fifth antennal segment having the stems 3 and ^Y^ times their 



length ; bred from galls of Phylloxera vastatrix 



grassator Fyles, C. ai654 



PARADIPLOBIS n. g. 



This genus is separated from Cecidomyia principally because of 

 the peculiar structures presented by the male genitalia. The basal 

 clasp segment is short, stout and broad, while the terminal clasp 

 segment is short, stout and apically with a broad, chitinized serrate 

 margin. The dorsal and ventral plates are short, broad, each rather 

 deeply and narrowly emarginate ; style short, stout. The third vein 

 unites with the margin at the apex of the wing. The palpi are 

 quadriarticulate and the claws simple. 



Type and sole species Cecidomyia obesa Felt. 



OBOLODIPLOSIS U. g. 



This genus has been erected to include a remarkable form which 

 diverges widely from the ordinary type of Cecidomyia in the male 

 genitalia. The terminal clasp segments are greatly produced, being 

 nearly ^^ longer than the basal clasp segment. The dorsal plate is 

 greatly expanded, nearly divided, the lobes being orbicular, while the 



