150 NEW YORK STATE MUSEUM 



living larvae very much as though they might be employed as pre" 

 hensile organs in somewhat the same way as described for the larvae 

 of Cecidomyia viticola O. S. 



Female. Length 2 mm. Antennae as long as the body, sparsely 

 haired, light brown; 14 segments, the fifth with a stem one-fourth 

 the length of the cylindric basal enlargement, which latter has a 

 length three times its diameter; terminal segment produced, the 

 cylindric basal portion with a length five times its diameter and 

 apically bearing a long, slender, fingerlike process. Palpi; the first 

 segment stout, with a length one-half greater than its diameter, 

 the second twice the length of the first, swollen distally, the third 

 longer and more slender than the second, the fourth about as long 

 as the third. Mesonotum light yellowish brown, the submedian 

 lines yellowish. Scutellum and postscutellum pale yellowish. Abdo- 

 men rather sparsely clothed with long, yellowish hairs, yellowish 

 brown; first segment yellowish basally. Wings hyaline, costa light 

 brown; halteres whitish transparent basally, slightly fuscous apically. 

 Legs long, slender, a light fuscous yellowish, the distal tarsal seg- 

 ments darker; claws stout, strongly curved, pulvilli shorter than the 

 claws. Ovipositor short, the lobes large, roundly quadrate. Type 

 Cecid. 875. 



Youngomyia producta n. sp. 



This singular form was taken at Kamer, N. Y., July 5, 1906 on 



bush honeysuckle, Diervilla lonicera. 



Female. Length 1.5 mm. Antennae as long as the body, sparsely 

 haired, light brown; 14 segments, the fifth with a stem about one- 

 fourth the length of the cylindric basal enlargement, which latter 

 has a length four times its diameter; terminal segment produced, 

 cylindric, with a length five times its diameter and apically a long, 

 fingerlike process swollen basally and separated from the preceding 

 by a distinct constriction. Palpi; first segment roundly subquad- 

 rate, the second with a length about two and one-half times its diam- 

 eter, the third and fourth subequal, each nearly as long as the second. 

 Face fuscous yellowish. Mesonotum dark brown, the submedian 

 lines yellowish. Scutellum deep orange, sparsely setose apically; 

 postscutellum light orange. Abdomen yellowish orange. Wings 

 hyaline, costa light brown; halteres yellowish basally, fuscous trans- 

 parent apically. Legs light brown; claws long, stout, evenly ctuved, 

 the pulvilli about half the length of the claws. Ovipositor short, 

 the lobes large, broadly oval, almost circular. Type Cecid. 474. 

 (See plate 7, fig. 3) 



THOMASiA Riibs. 



1910 Rubsaamen, E. H. Zeitsch. Wissenschaft. Insektenbiol., 15:288; 

 16:168 



191 1 Felt, E. P. N. Y. Ent. Soc. Jour., 19:53 



19 13 Kieffer, J. J. Gen. Insect., fasc. 152, p. 236 



The claws are all toothed, the teeth standing out prominently, the 

 pulvilli nearly as long as the claws. The dorsal plate is short, the 



