REPORT OF THE STATE ENTOMOLOGIST I918 



153 



1907 N. Y. State Mus. Bui. no, p. 133-34; separate, p. 37 



(Cecidomyia orbiculata) 



1908 N. Y. State Mus. Bui. 124, p. 410-11 (Obolodiplosis 



orbiculata) 



1918 



N. Y. State Mus. Bui. 200, p. 155 



The remarkable male was taken June lo, 1906 on the common 

 locust, Robinia pseudo-acacia, at Albany, N. Y. A 

 ntimber of adults were reared June 12 and 13, 191 1 from irregular, 

 marginal leaf folds on locust, Robinia, collected by Dr J. R. Gillett at 

 Kingston, N. Y. Specimens in the United States National Museum 

 labeled Diplosis robiniae belong here, having been reared 

 at Washington June 25, 1903. The larvae are large, whitish, pupate 

 for the most part within the galls, the pupa wriggling partly out 

 before disclosing the imago. It is a common and occasionally an 

 injurious species, many leaflets being destroyed. 



Gall. Length about 1.5 cm, diameter 2 to 3 nTm. This is an 

 irregular, marginal leaf roll containing whitish larvae. 



Larva. Length about 3 mm, whitish, tapering anteriorly. 



Pupa. Length 2.5 mm, mostly dark reddish brown; thoracic 

 horns short; eyes rather fuscous; wing pads extending to the fourth 

 abdominal segment, the leg cases to the sixth or seventh. 



Exuviae. Whitish transparent, the abdominal segments dorsally 

 with a transverse row of stout, well separated spines on the posterior 

 margin. 



Male. Length 3 mm. Antennae about as long as the body, 

 thickly haired, dark brown; fourteen segments, the fifth (fig. 27a) 



Fig. 27 Obolodiplosis robiniae: a, sixth antennal segment, only one seta 

 sketched in; b, terminal antennal segment of male, setae not sketched in; 

 c, side view of fifth tarsal segment and claws (enlarged, original) 



