134 NE W YORK STATE MUSEUM 



the first segment short, stout, subquadrate, the second one-half 

 longer, stouter, the third a little longer, more slender, though 

 swollen distally, the fourth about one-half longer than the third, 

 strongly flattened. Face sparsely clothed with silvery white scales, 

 the mouth-parts fuscous yellowish, the eyes rather large, faintly 

 margined posteriorly with silvery white. Mesonotum dark brown, 

 rather broadly margined laterally and anteriorly with silvery white, 

 the submedian lines sparsely haired. Scutellum fuscous yellowish, 

 postscutellum a little darker. Abdomen dark brown, the basal 

 segment silvery white dor sally, the third and fourth segments rather 

 broadly margined along the median third posteriorly with silvery 

 white, the second segment with an elongate, median silvery white 

 dot on the posterior margin; ovipositor pale yellowish; venter 

 sparsely clothed with silvery white scales. Wings hyaline, costa 

 dark brown, the silvery white discal spot just before the basal half, 

 the third vein uniting with the anterior margin just before the 

 basal half. Halteres pale yellowish, apically a light salmon. Coxae 

 fuscous basally, yellowish apically; femora and tibiae dark brown, 

 irregularly and broadly banded at the extremities with silvery 

 white, tarsi dark brown; claws long, slender, strongly curved, the 

 pulvilli a little shorter than the claws. Ovipositor about two- 

 thirds the length of the abdomen, the terminal lobes slender, narrowly 

 rounded. Type Cecid. a 1469a. 



Lasioptera farinosa Beutm. 



1862 Osten Sacken, C. R. Dipt. N. Am. Mon., 1:204 



1891 Riley, C. V. & Howard, L. O. Ins. Life, 4:126 (Polygnotus 

 r u b i Ashm. reared) 



1892 Beutenmueller, William. Am. Mus. Nat. Hist. Bui., 4:273 

 1894 Brodie, William. Biol. Rev. Ont., 1:110 (Diplosis) 



1907 Beutenmueller, William. Amer. Mus. Nat. Hist. Bui., 23:397-98 



1908 Felt, E. P. N. Y. State Mus. Bui. 124, p. 325 



1908 Jarvis, T. D. Ent. Soc. Ont., 38th Rep't, p. 88 



1909 Ent. Soc. Ont., 39th Rep't, p. 78 



1910 Stebbins, F. A. Springf. Mus. Nat. Hist. Bui. 2, p. 35 



This gall is a very characteristic, warty, usually pruinose, woody 

 swelling at the base of the leaflets or midrib of the common blackberry. 

 It was recognized by Osten Sacken as early as 1862. Messrs Riley 

 and Howard in 1891 record rearing therefrom a parasite (Polyg- 

 notus rubi Ashm.) and it has been subsequently noticed by 

 Beutenmueller and Brodie, the former obtaining the adult and 

 describing the same in connection with the larva in 1907. The 

 species is rather common in the vicinity of Albany and New York. 

 It is evidently widely distributed, as there are specimens in the 

 collections of the United States National Museum from Virginia, 

 and Kirkwood, Mo., while Beutenmueller records it from North 

 Carolina and Brodie from Toronto. The larvae winter in the galls 



