194 E. T. CRESSOX. 



black, quadrate, abrupt laterally and abruptly truncate at tip, above minutely 

 and transversely aeiculated, the disc with four or five approximate longi- 

 tudinal carinse, posterior face transversely aeiculated, the sides longitudinally 

 so; tegulse ferruginous; wings tinged with yellowish-fuscous; legs short, 

 robust, pale ferruginous, anterior coxse black, all the femora incrassate; abdo- 

 men elongate ovate, smooth and polished, black, immaculate, apex ferruginous. 

 Length .26 inch. 



One specimen. (Coll. G. W. Belfrage.) A very conspicuous 

 species, resembling rvfipes in general form, but much larger and 

 differently colored. 



Epyris rufipes. 



Bethylus yujipes, Say. Long's 2d Exped. ii., p. .129. 

 Two specimens. (Belfrage.) 



DOKYLIDiE. 



Lab id us Sayi. 



Labidm Sayi, Hald. Stansb. Salt Lake Exped. Append, p. 3G7, pi, 9, fig. 1—3. 

 Three % specimens. (Belfrage j Heiligbrodt.) 



Labidus mexicamss. 



Labidus mexicanus, Smith, Brit. Mus. Cat. vii. p. 7. 

 Eight % specimens. (Belfrage. ) 



Labidus Ilarrisii. 



Labidus harrisii, Hald. Stansb. Salt Lake Exped. Append, p. 367, pi. 9, tig. 4. 

 Eleven £ specimens. (Belfrage.) 



Labidus nigresceus, n. sp. 



% .—Black, clothed with a short appressed yellowish silky pubescence, 

 long on vertex and face; eyes smaller than usual, prominent; ocelli approxi- 

 mate, a broad space between them and the eyes; before anterior ocellus two 

 prominent longitudinal ridges; mandibles robust, reddish at tips; antennteNis 

 long as head and thorax, dark ferruginous; thorax above gibbous anteriorly 

 and posteriorly, rather closely and finely punctured; mesothorax with a cen- 

 tral longitudinal ridge extending from disc to anterior margin; wings uni- 

 formly pale fuliginous, stigma tolerably large and with the nervures black, 

 marginal cell elongate triangular, pointed at apex, second submarginal cell 

 irregularly elongate quadrangular, narrower at apex, receiving the recurrent 

 nervure about one-third from base; legs slender, rufo-pieeous, knees and tarsi 

 paler, tip of posterior tarsi not quite reaching to apex of abdomen : abdomen 

 strongly sericeous, densely and minutely punctured, apical margin of the seg- 

 ments slightly constricted and rufo-piceous, the peduncle very transverse, base 

 broadly not deeply concave with sides rounded, apex truncate, pubescent, an- 

 gles subobtuse, lateral margin not raised, apical segment rounded, not com- 

 pressed, except at the extreme apex which is acute and ferruginous, apical 

 ventral segment ferruginous, produced at tip into a bilobate, bicarinate, scale- 

 like process, the tip of each lobe acute and somewhat recurved. Length .45 

 inch. 



One specimen. (Coll. G. W. Belfrage.) 



