6 PROCEEDINGS OF THE NATIONAL MUSEUM voi,. 71 



broad, beneath basally sulcate longitudinally and laterally bicarinate 

 anteriorly, apically furnished with a pair of obscurely segmented 

 styles about five times as long as broad, the posterior margin of the 

 plate between the styles nearly straight; subgenital plate of the 

 female transverse, posteriorly broadly triangularly notched; cerci of 

 both sexes short, about twice as long as basally thick, in the female 

 cylindrical and simple, tapering to a rather sharp and gently incurved 

 point, in the male more abruptly tapering apically to a sharp and 

 abruptly incurved tooth and armed with a small triangular point 

 near the base of the apical tooth on the dorsal flange formed by the 

 flattened inner surface of the cercus; ovipositor longer than the body 

 and curving gently downwards, the tip rather abruptly tapering, 

 more on the dorsal margin, to a sharp point. 



Legs rather slender; plantula of posterior tarsi no longer thau 

 broad, less than one-half as long as the basal tarsal segment; ante- 

 rior tibiae with three dorsal spines on the outer margin, one apical, 

 one mesial and one at the apex of the conchate foramen, and with a 

 single apical spine on the inner margin, beneath armed with six long 

 spines on each margin; middle tibiae with four spines on each dorsal 

 margin and six or seven on each ventral margin; posterior tibiae 

 armed above and below on both margins, above armed nearly to the 

 base, the apical pair of spines much the longest, and beneath armed 

 for a lesser distance with smaller spines, the apical ventral calcars 

 four in number, the inner pair about one-half as long as the outer 

 pair; anterior and intermediate femora unarmed above, beneath 

 unarmed or armed with from one to three small teeth on the caudal 

 margin; posterior femora long, greatly swollen in the basal third, 

 beyond more slender and armed beneath on each margin with sev- 

 eral short, sharp black teeth. 



Tegmina short and broad in both sexes, not or but little longer 

 than the pronotum, apically broadh^ rounded, in the female but 

 little overlaping above, in the male strongly so; stridulating tympa- 

 num of the male well developed; wings narrow, slightly more than 

 one-half as long as the tegmina. 



Measurements. — Length, pronotum, male 7mm., female 7.25 mm.; 

 tegmina, male 11 mm., female 8 mm.; posterior femora, male 25 mm., 

 female 26 mm. ; ovipositor, 28 mm. ; width, pronotum posteriorly, male 

 4.5 mm., female 5 mm. ; posterior femora at widest point, male 4 mm., 

 female 4.5 mm. 



Type locality. — Kongaus, Siberia. 



Described from one male and three females, all adults, taken by 

 T. D. A. Cockerell in August, 1923. 



Type, male; allotype, female; paratypes A and B, females. 



Type.— Cat. No. 29214, U.S.N.M. 



