^m"'] PROCEEDINGS OF THE NATIONAL MUSEUM. 395 



ing joint, the following joiuts gradually become shorter and shorter, to 

 the last joint, the six or seven apical joiuts not being longer than wide, 

 the last being fusiform and about twice as long as the penultimate. 

 Thorax with parapsidal grooves indicated anteriorly, the collar with 

 raised lines on the sides, the scutellum high, convex; metathorax ob- 

 liquely truncate posteriorly, distinctly areolated, the upper surface very 

 short, the lateral posterior angles rather prominent, spiracles very 

 large and round. Abdomen rather long, pointed fusiform, the venter 

 not retracted but convex, the whole surface, except the petiole, smooth 

 and highly polished, the petiole gradually bent with large round spira- 

 cles between the middle and the apex ; on the disk is a central, longitu- 

 dinal groove abbreviated before attaining the apex, and on both sides 

 of the groove are some raised longitudinal lines. Wings hyaline, stig- 

 ma and veins brown-black, the areolet pentagonal, the upper side the 

 shortest. 



Habitat. — Kansas. 



Described from one specimen. The large round metathoracic spiracles 

 and the high convex scutellum will enable this species to be at once 

 recognized. 



NEMATOMICRUS Wesmael. 

 Nematomicrus coloradensis sp. no v. 



Female. — Length, 6 mm . Black, smooth, highly polished; palpi, legs 

 and abdomen, ferruginous. Antenna? short, rather stout with close set 

 joints, three or four basal joints of flagelluin submoniliform, the first 

 joint being not much longer than thick; the scape very stout, oval. 

 Head subquadrate; thorax without parapsidal grooves, the disk flat- 

 tened; scutellum flat; metathorax distinctly areolated, punctate, the 

 spiracles round; legs rather short, stout, the femora especially so, par- 

 ticularly the posterior pair, posterior coxa? and first joint of trochanters, 

 black, the middle and posterior tibiae armed at apex with two divergent 

 spines, and the apices of all the tibia? are surrounded by numerous 

 short, stout spines. Abdomen pointed, fusiform, highly polished and 

 sparsely pubescent, the ovipositor very slightly exserted; the petiole 

 is black, broadened posteriorly, and with some longitudinal stria? before 

 the apex. Wings hyaline; stigma and veins brown-black, the areolet 

 pentagonal, all the sides equal. 



Habitat.— Custer County, Colo. 



Described from one specimen, received from Mr. T. D. A. Cockerell. 



COLPOGNATHUS Wesmael. 

 Colpognathus euryptychiae sp. nov. 



Female. — Length, S 11 "". Dark ferruginous, shining, the apex of abdo- 

 men only slightly dusky, similar in stature to C. helvus Cr., but slightly 

 more robust. The antenna? are 26-jointed, involuted, dusky towards 

 apex, with the joiuts 10 to 13 more or less distinctly yellow, the second, 



