Il6 NEW YORK STATE MUSEUM 



twice its diameter, the third one-third longer than the second, more 

 slender, the fourth a httle longer than the third, somewhat dilated; 

 face fuscous yellowish. Mesonotum dark brown, the submedian 

 lines thickly haired. Scutellum and postscutellum dark brown. 

 Abdomen a light olive brown, rather thickly clothed with fuscous 

 hairs. Wings subhyaline, spotted with fuscous, with fuscous mark- 

 ings at the basal third on costa and at the posterior margin and near 

 the middle of the third vein and at the fork of the fifth vein and a 

 less distinct fuscous spot at the apical third on the third vein; costa 

 pale straw; halteres yellowish transparent. Legs a light yellowish 

 brown, except the posterior tibiae and tarsi which are light yellowish 

 with a long, fuscous annulation on the tib^'ae distally, the three 

 distal tarsal segments slightly fuscous; claws long, slender, strongly 

 curved, the pulvilli a little shorter than the claws. Genitaha; dorsal 

 plate long, broad, deeply and triangularly emarginate, the lobes 

 narrowly rounded. Type Cecid. 599. 



Contarinia negundifolia Felt 



1908 Felt, E. P. N. Y. State Mus. Bui. 124, p. 394 



1909 Ent. Soc. Ont. 39th Rep't, p. 43 



The species, received through the courtesy of the United States 

 National Museum, was reared April 21, 1885 from leaves of box 

 elder, Negtmdo aceroides, collected by Theodore Pergande 

 May 12, 1884 in Virginia. Mr Pergande states that the larv^ae 

 deserted the gall May 15th and entered the ground, remaining there 

 until the following spring. Apparently the same form was received 

 June 20, 1908 from the late Dr James Fletcher, Ottawa, Can., and 

 again July 8, 1916 from Winnipeg, Manitoba, through J. M. Swaine, 

 assistant entomologist of the entomological branch of the Canadian 

 Department of Agriculture. It may possibly be identical with 

 Cecidomyia negundinis Gill. 



Gall. Irregular, globose, pocket-shaped, separate or confluent, 

 midrib or vein swellings, usually with a slight enlargement on the lower 

 surface and a marked elevation on the upper surface. The color 

 may vary from a light bluish green to a yellowish or even deep red ; 

 diameter 2 to 4 mm, the opening on the under surface. Badly infested 

 leaves may be crumpled and yellowish. 



Larva. Moderately stout, whitish, distinctly segmented, the 

 extremities rounded; length 2 mm; head small, broadly rounded 

 anteriorly, the antennae moderately long, biarticulate, the terminal 

 segment narrowly rounded apically; breastbone bidentate, narrowly 

 triangular, the anterior margin expanded and the shaft tapering 

 from the base of this to a subacute apex posteriorly; skin rather 

 coarsely shagreened, posterior extremity broadly rounded and with 

 a dorsal pair of submedian short, broadly triangular, chitinous 

 processes. 



