BIOLOGICAL PAPERS. 279 



Type: University of Kansas. Type locality: Morton county, Kansas, 3200 

 feet. One specimen. January, 1902, F. H. Snow. 



Brachistes nocturnus, n. sp. 



Male. — Length, 2.5 mm. Head with vertex, occiput and cheeks polished, 

 apparently impunctate; face elevated, dullish; clypeus smooth, sparsely punc- 

 tured with indistinct punctures; antennae about twenty-five jointed, scape nearly 

 as long as the first joint of the flagellum, pedicellum longer than wide. Dor- 

 sulum polished, with a central triangular lobe the apex of which almost attains 

 the posterior margin, the lobe bounded by the distinct parapeidal grooves which are 

 quite deep and crenulate; pleura shining, rugulose; scutellum shining, sparsely 

 punctured, a broad depression immediately in front of the scutellum with a longi- 

 tudinal raised line in it; metathorax moderately and uniformly rugulose, almost 

 distinctly reticulate; first abcissa of the radius almost obsolete, first diacoidal 

 cell almost sessile, recurrent nervure interstitial, transverse median nervure re- 

 ceived by the median nervure a little beyond the insertion of the basal nervure, 

 median nervure obsolescent between the basal nervure and the base of the wing; 

 wings pale, membrane colorless or nearly, nervures testaceous, stigma and an- 

 terior margin brownish. Abdomen with the first segment longitudinally striate, 

 the striiu not very closely arranged, the succeeding segments smooth and polished. 

 Thinly sericeous, the pubescence most abundant on the face between the clypeus 

 and antenniu. Black ; antenniu, except scape, and the clypeus brown ; scape, man- 

 dibles and legs testaceous, the apical joint of the tarsi brown. 



Type: University of Kansas. Type locality: Lawrence, Douglas county, 

 Kansas. One specimen. May; taken at night; E. S. Tucker. 



Ccenocelius politifrons, n. sp. 



Male. — Length, 6 mm. Head shining; face rather closely punctured, the 

 punctures one or two punctures apart, sparsest in the middle; clypeus not 

 clearly defined, longitudinally striate; vertex and cheeks polished, sparsely 

 punctured; scape about as long as the pedicellum and first joint of the flagellum 

 together, first joint of the flagellum a little longer than the second, the second 

 and succeeding segments subequal; antenna^ about twenty five jointed (tips 

 broken). Prothorax rugose; dorsulum polished, with distinct crenulate parap- 

 eidal grooves; scutellum polished, almost impunctate ; mesopleura with the su- 

 perior, anterior and posterior borders rugose, the disc polished and sparsely, 

 finely punctured, a crenulate furrow separating the pleura from the smooth 

 sternum; metathorax rugose; wings strongly brownish, the stigma and nervure? 

 very dark brown, petiole of the first discoidal nervure as long as the second trans- 

 verse cubitus, the first abcissa of the radius a little shorter than the second 

 transverse cubitus, the second abcissa a little shorter than the first transverse 

 cubitus, transverse median nervure interstitial, likewise the recurrent nervure. 

 Abdomen polished; the first segment rather grooved longitudinally in the mid- 

 dle. Thinly clothed with fine white pubescence. Black; metathorax ferrugi- 

 nous; posterior legs excepting tibias and tarsi a paler shade of ferruginous than 

 the metathorax; abdomen yellowish ferruginous; tibite and tarsi brownish. 



Type: University of Kansas. Type locality : Douglas county, Kansas. Col- 

 lected in timber along Kansas river, near Lawrence. June, 1892, E. S. Tucker. 



Zele crassicalcaratus, n. sp. 



Related to Zele mellens, from which it is at once distinguished by the thick- 

 ened spurs and difference in sculpture. 



Male. — Length, 5 mm. Head shining, rather irregularly punctured, the 

 punctures shallow, most distinct on the front; clypeus polished, almost impunc- 



