110 Journal New York Entomological Society. [Vol. xvi. 



"Revision of the Nematinse of N. Am." It maybe known from 

 that species by the narrower head, third antennal joint not much 

 longer than fourth, middle tibire and tarsi ferruginous, etc. From 

 the habitat it would seem to be the male of daivsoni, but it differs so 

 much that I do not think it can belong to this species. 



ii. Emphytus leucostoma, new species. 



Male. — Length 6 mm.; length of anterior wing 5 mm. Slender; head about 

 as wide as thorax, smooth, shining ; vertex without furrows; ocellar region somewhat 

 raised ; third antennal joint a little longer than fourth, apical four joints equal, some- 

 what rounded beneath ; malar space very narrow ; clypeus broadly, deeply emarginate, 

 lobes somewhat truncated ; labrum rounded at apex. Thorax shining. Claws sim- 

 ple. Transverse radial near third transverse cubitus ; transverse median in about 

 middle of cell ; cross-nervure of lanceolate cell but slightly oblique ; hind wings 

 without discal cells; lanceolate cell shortly petiolate at apex. Abdomen as usual. 

 Color black ; clypeus, labrum, mandibles (apex rufous), posterior angles of pronotum, 

 tegulae, spot on pleurae before intermediate coxae, four anterior legs, posterior legs to 

 tibiae, venter (the apex is yellowish) white ; four anterior tarsi and posterior femora 

 somewhat infuscated ; posterior tibiae and tarsi strongly infuscated ; tergal segments 

 two and following with a ferruginous spot in middle of apical margin and narrow 

 apical margin. Wings dusky hyaline, iridescent ; nervures, costa and stigma except 

 base which is pallid dark brown. 



Habitat. — Ute Creek, Costilla Co., Colo., 9000 ft., July 4, 

 1907 (R. W. Dawson). Type in the entomological collection of the 

 University of Nebraska. 



This pretty little species may be separated from its allies as 

 follows : 



1. Abdomen black, not marked; clypeus black inornatm Say. 



Abdomen marked with yellowish-brown ; clypeus white 2 



2. Basal joint of antennae white; clypeus slightly emarginate angustus Kincaid. 



Basal joint of antennae black ; clypeus deeply emarginate 3 



3. Claws with a large inner tooth ; sinus behind ocelli ; venter black at base ; an- 



tennae ferruginous beneath (east to 111.) apertus Nort. 



Claws simple ; no sinus behind ocelli ; venter entirely pale ; antennae not pale 

 beneath (Colo.) leucostomus, new species. 



12. Taxonus lenis, new species. 



Male. — Length 6.5-7 mm. Head finely, moderately densely punctured, 

 covered with short black hair ; ocellar basin triangular, lower wall not very 

 well defined, side walls well defined ; middle fovea broad, shallow ; antennal foveae 

 quite distinct, broader below the antennae ; antennae rather stout, third and fourth 

 joints equal, fifth a little shorter ; clypeus deeply, squarely emarginate, lobes narrow, 

 sharply pointed ; labrum rounded at the apex ; front well produced between the an- 

 tennae. Thorax not as densely punctured as the head ; post-scutellum pointed pos- 

 teriorly ; inner spur of anterior tibiae thicker than outer one. Claws apparently 



