56 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 52. 



The flagellum is testaceous above and segments 6-10 are slightly 

 carinate on the posterior surface. The ultimate flagellar segment 

 is curved and obliquely truncate at the apex. The wings are hyaline 

 and the second cubital cell is decidedly narrower on the radial vein 

 than it is on the cubitus. The anterior tarsus is somewhat flattened 

 but scarcely as much so as in the case of femorata, and like that species 

 it has a distinct black spot below on anterior tarsal segments. The 

 middle femora are emarginate and the middle tibia apically on the 

 posterior side bears a short spine, which in conjunction with flattened 

 and slightly curved base of the metatarsus forms a structure some- 

 what similar to the antenna cleaner of the first pair of legs. The 

 posterior femora are slightly curved below and distally incrassate, 

 but they are not emarginate. The second sternite bears a pair of 

 short, pointed, closely approximated tubercles, and there is a smaller, 

 inconspicuous pair on each of the third and fourth sternites more 

 widely separated than those on the second. The pubescence is 

 white, short, and sparse, except on the seventh sternite, where it is 

 relatively long, dense, and brown. The eighth sternite lacks a discal 

 spine, but there is a longitudinal prominence at the base of the 

 middle spine. The genital stipes is distinct in pattern. 



Length. — 12-14 mm. 



This species stands very close to femorata Fox, but it differs from 

 that species in its more extensive maculations, its richer yellow color, 

 and especially in the form of the genital stipes. The species is 

 described from two male specimens taken by Mr. F. X. Williams. 



Habitat. — Kansas. 



Type. — Male and paratype in the collection of the University of 



Kansas. 



Genus BICYRTES Lepeletier. 



Bembex Olivier (part), Encycl. Meth., vol. 4, 1789, p. 288. 

 Monedula Dahlbom (part), Hym. Eur., vol. 1, 1845, p. 492. 

 Bicyrtes Lepeletier, Hist. Nat., vol. 3, 1845, p. 53. 



Type: Bicyrtes (servillii Lepeletier) ventralis Say. Monobasic 

 Bembidula Burmeister, Bol. Acad. Cordova, vol. 1, 1874, p. 122. 



Type: Monedula discisa Taschenberg. (Present designation.) 

 Bembidula Handlirsch, Sitz. Akad. Wissensch. Wien, Math. -Nat. CI., vol. 98, 



1889, p. 473. 

 Bembidula Kohl, Die Gatt. d. Spheg., 1896, p. 442. 



The head seen from in front is wider than long. The compound 

 eyes are large and stongly arched; their inner borders are somewhat 

 divergent at the vertex, and their lower borders reach the mandibles. 

 The frons is relatively flat, variable in width, and bears a slight carina 

 between the antennae. The anterior ocellar cicatrice is situated on a 

 slight prominence. It is linear, arcuate, and transversely placed. 

 The posterior cicatrices are also linear but not so narrow as the ante- 

 rior one, semicircular, and almost longitudinally placed. The 



