8 PROCEEDINGS OF THE NATIONAL. MUSEUM tol. 68 



cubitus one-third shorter than the fourth abscissa; sheath straight 

 above, rounded apically, convex below. Black; clypeus (except 

 margin), scape, metaepisternura, narroAv margin of the first, fourth, 

 and fifth tergites, a median spot on the seventh, eighth, and ninth 

 tergites, two spots on scutellum, small anterior spot on tegulae, yel- 

 low; legs black, apices of the anterior femora beneath, the four 

 anterior tibiae beneath, and posterior tibiae (except apices), yel- 

 low ; wings subhyaline, radial, anterior margin of cubital and apical 

 part of first discoidal cells, brownish; venation black, costa and 

 stigma, reddish yellow ; thorax with short, gray hair. 



Type-locality. — Kongaus, Siberia. 



Described from a single female collected August, 1923, by T. D. A. 

 (>3ckerell. 



Type.—Q^i. No. 27619, U.S.N.M. 



TENTHREDO KONGAUANA. new species 



This species seems to be allied to Tenthredo ornatus (E. Andre) 

 but differs from the description of that sj)ecies in the absence of 

 many black markings. From Enslin's redescription of Tenthredella 

 microps (Konow) it differs in the absence of black spots from the 

 clypeus, the absence of a black line on the anterior legs, and the 

 more strongly convex scutellum. 



Female. — Length, 11 mm. Anterior margin of the labrum broadly 

 rounded anteriorly ; the clypeus with a broad, deep, arcuate emargi- 

 nation and narrow, obtuse lobes; head shining, practically without 

 sculpture; antennal furrows complete; no flange above the bases of 

 the antennae; postocellar furrow straight, well defined; postocellar 

 area narrowing anteriorly; third antennal joint nearly as long as 

 the two following; the flagellum short, of uniform width; oc- 

 cipital carina feeble; mesoscutum and prescutum with small, well- 

 separated punctures; scutellum smooth, strongly convex but hardly 

 pyramidal; mesepisternum very finely tessellated, the median 

 tubercle prominent; fourth abscissa of cubitus subequal with the 

 second intercubitus ; interradius strongly curved apically; third 

 intercubitus about five times as long as the second; sheath broadly 

 rounded apically, convex above and below. Pale-yellow (perhaps 

 green in life) ; pedicle, flagellum, a large spot on frons including 

 the ocelli and W-shaped dorsally, spots on lateral lobes, a large spot 

 on the prescutum, black; the second, third, and fourth tergites 

 brownish medianly; legs the color of the body; the apices of the 

 hind femora dorsally, the dorsal part of the posterior tibiae and all 

 of the posterior tarsi, black; wings hyaline; venation dark brown; 

 costa and stigma pale yellow. Body without long hair. 



Type-locality. — Kongaus, Siberia. 



