OF WASHINGTON. 283 



ginous, with the middle and hind coxae black, the hind tibial spurs nearly 

 as long as the basal joint of tarsi. Abdomen as long as the head and 

 thorax united, elongate oval, depressed with pale colored ventral fold on 

 first three segments, the surface above granulated, the segments 2 and 3 

 subequal, wider than long, the following much shorter. 



Hab. Fort Collins, Colorado. 

 Type in Collection Ashmead. 



Described from i g specimen, received from Mr. Carl F. 

 Baker, and in honor of whom the species is named. 



(2) Elasmosoma schwarzi sp. n. 



9- Length 3 mm. Black, subopaque, shagreened, with the head less 

 distinctly sculptured than the preceding species, the vertex shining and 

 very delicately transversely aciculated. Ocelli white. Eyes large, strongly 

 convergent anteriorly. Two basal joints of antennae, trophi and legs, 

 white or yellowish-white, flagellum brown, the first joint being a little 

 shorter than the scape and pedicel united. Wings hyaline, the costa and 

 stigma dark brown. Abdomen subpetiolate, much elongated and twice as 

 long as the head and thorax united, with parallel sides, all the segments, 

 except the second and the last two, are longer than wide, the second is a 

 little wider than long, the last two very short; the upper surface is fiat, 

 finely shagreened black ; beneath there is a ventral fold which is more or 

 less tinged with piceous. 



Hab. Washington, D. 



Type in Collection Ashmead. 



Described from i 9 specimen and dedicated to Mr. E. A. 

 Schwarz, who captured it on the outskirts of Washington, July 

 15, 1889. 



(3) Elasmosoma pergandei sp. n. 



9- Length 2 mm. Black, subopaque, shagreened; clypeus and man 

 dibles, except teeth, brownish-yello,w; palpi, middle and anterior legs and 

 hind coxae, yellowish-white; hind legs, except tarsi, brownish-yellow, 

 their tarsi brown or fuscous Wings grayish-hyaline, the costa and stigma 

 dark brown, the internal veins lighter brown or brownish-yellow, the 

 radial cell closed and indistinctly separated by a faint cross-vein into two 

 cells, the veins, however, only distinctly seen by transmitted light. The 

 head is transverse, a little wider than the thorax, the frons and vertex 

 finely transversely shagreened, the eyes strongly facetted, bare, convergent 

 below and reaching almost to the base of the mandibles. Antennae 13- 

 jointed, filiform, tapering toward apex, black, with the scape and pedicel 

 brown; the scape is not longer than the first joint of flagellum, the joints 

 of the flagellum being a little longer than thick. Thorax ovate, finely 

 shagreened, the collar not visible from above, the metanotum with some 



