1 62 NEW YORK STATE MUSEUM 



stigma on the basal half, it and the base of costa thickly clothed 

 with dark brown scales. Halteres whitish transparent. Coxae 

 dark yellowish brown; femora pale yellowish, tibiae and tarsi slightly 

 variable dark brown; claws rather stout, strongly and evenly curved. 

 Ovipositor nearly as long as the body; basally, oval patches of 

 halberd-shaped scales; terminal lobes long, slender, rather broadly 

 rounded, with a group of pale, slightly curved rods and three heavy 

 hooks. Type Cecid. 280. 



Lasioptera tripsaci Felt 

 1910 Felt, E. P. Ent. News, 21:10 



This dark brown, white-banded species was reared at Piano, 

 Texas, August 12, 1909 from larvae occurring between the leaf 

 blades of Gama or Sesame grass, Tripsacum dactyloides 

 and transmitted to this office by Prof. F. M. Webster under the 

 number 601 1. 



Lasioptera cassiae Felt 

 1909 Felt, E. P. Econ. Ent. Jour., 2:287-88 



This species was reared May 8 and June 16, 1883 from stem galls 

 on the sensitive plant, Cassia nictitans, taken by H. K. 

 Morrison at Fort Huachua, Ariz. We are indebted to the courtesy 

 of Doctor Howard and the United States National Museum for 

 an opportunity to describe this interesting form. 



Gall. Length 3 cm, diameter 5 or 6 mm. This is an irregular, 

 elongate, fusiform stem gall, purplish brown in color and evidently 

 polythalamous, since circular exit holes occur here and there over 

 its surface (Pergande, Bureau Notes). 



The larva is described by Mr Pergande as bright orange with 

 a brown breastbone. 



Male. Length 1.5 mm. Antennae dark brown, 19 segments, 

 the fifth with a length about equal to its diameter, the terminal 

 segment slightly produced, broadly oval. Palpi presumably 

 quadriarticulate. Mesonotum dark brown, the submedian lines 

 thickly haired. Scutellum yellowish brown, rather thickly haired, 

 postscutellum darker. Abdomen dark reddish brown, the segments 

 rather narrowly margined posteriorly with silvery white. Wings 

 hyaline, costa probably dark brown, the third vein uniting with 

 the margin just beyond the basal half, the whitish stigmatal spot 

 small; halteres pale yellowish. Legs a nearly uniform yellowish 

 brown, the tibiae and the distal tarsal segment apically somewhat 

 darker; claws stout, the pulvilli about half the length of the claws. 

 Genitalia; basal clasp segment long, stout; terminal clasp segment 

 short, swollen at the base; dorsal plate short, broad, broadly 

 and roundly emarginate; ventral plate short, broad, deeply and 

 triangularly emarginate. Harpes long, stout. 





