278 NEW YORK STATE MUSEUM 



tapering at both extremities and with a length one-half greater than 

 its diameter; terminal segment produced, tapering, narrowly rounded. 

 Palpi; consisting of one short, subglobose segment. Mesonotum 

 dark reddish brown. Scutellum reddish brown. Abdomen dark 

 brown. Halteres yellowish transparent. Legs light straw; claws 

 long, slender, strongly curved, the pulvilli as long as the claws. 

 Ovipositor about two-thirds the length of the body, the terminal 

 lobes short, stout, tapering, narrowly rounded. Type Cecid. 1029. 



Rhopalomyia castaneae Felt 



1909 Felt, E. P. Econ. Ent. Jour., 2: 291 



A fuscous orange female was reared June 13, 1908 from the leaf 

 petiole of chestnut, Castanea dentata, taken at Stowe, 

 Mass. 



Gall. The injury is primarily to the leaf petiole though the 

 affected area may embrace the entire tip of the twig and cause a 

 deformity similar to brussels sprouts. 



Female. Length 1.75 mm. Antennae hardly extending to the 

 base of the abdomen, sparsely haired, dark brown, the basal seg- 

 ments yellowish; 12 segments, the fifth with a length one-fourth 

 greater than its diameter, tapering distally; terminal segment 

 slightly produced, tapering to a narrowly rotmded apex. Palpi 

 biarticulate ; face yellowish. Mesonotum dark brown, the broad 

 submedian lines yellowish, sparsely haired. ScuteUum reddish 

 orange, postscutellum reddish brown. Abdomen a deep fuscous 

 orange, sparsely haired, the ovipositor yellowish. Wings almost 

 subhy aline, thickly haired, costa dark brown. Halteres pale orange. 

 Legs mostly dark brown; claws long, slender, evenly curved, the 

 pulvilli distinctly longer than the claws. Ovipositor nearly as long 

 as the abdomen, the terminal lobes long, slender, with a length about 

 five times their diameter. Type Cecid. ai7i6. 



Rhopalomyia chrysopsidis Lw. 



1862 Loew, Hermann. Mon. Dipt. N. Amer., 1:203-4 (Cecidomyia) 

 1893 Townsend, C. H. T. Ent. Soc. Wash. Proc, 2: 389 (Cecidomyia) 



The gall produced by this species on Chrysopsis mariana 

 is apical, light brown, irregular, woolly and about three-fourths of an 

 inch in diameter . The interior consists of many single galls which have 

 no compartments and coalesce here and there, each being conical 

 unless modified by pressure. The gall described by Townsend as 

 cited above, appears to be quite different and, judging from the 

 account, may have produced a species of Lasioptera. We have 

 provisionally referred the form described by Loew to Rhopalomyia. 



