REPORT OF THE STATE ENTOMOLOGIST 1918 153 
1907 '———' N. Y. State Mus. Bul. 110, p. 133-34; separate, p. 37 
(Cecidomyia orbiculata) 
1908 ————— N. Y. State Mus. Bul. 124, p. 410-11 (Obolodiplosis 
orbiculata) 
Ors Nv Y. State!Mus. Bul: 200, p. 155 
The remarkable male was taken June 10, 1906 on the common 
locust, Robinia pseudo-acacia, at Albany, N. Y. A 
number of adults were reared June 12 and 13, 1911 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 mm. 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) 
Pets) Os. 
pies SONG ena 
> 
egy os 
= 
ee fe 
9 
rir Ge 
Th 
= 

Fig. 27 Obolodiplosis robiniae: a, sixth antennal segment, only one seta 
sketched in; 6, terminal antennal segment of male, setae not sketched in; 
c, side view of fifth tarsal segment and claws (enlarged, original) 
