48 INSECUTOR INSCITI^ MENSTRUUS 



( 9 ). Essentially similar to the male in color and structure 

 except that the cephalic geniculations of the intermediate fe- 

 mora are about as sharply spined as the caudal ones and the 

 penultimate segment of the abdomen is laterally piceous. The 

 ovipositor is long and heavy, over twice as long as the prono- 

 tum, the lower margin gently curved upward, and finely ser- 

 rated for two-thirds of the length, the upper margin nearly 

 straight only apically serrate and these scarcely discernibly so. 

 The ovipositor is blackish in the apical half, especially the mar- 

 gins. Cerci simple, rounded, tapering in the apical fourth to a 

 point. Subgenital plate subtriangular, a little longer than 

 broad, the apex broadly rounded and entire. Supraanal plate 

 blackish, triangular, and broadly sulcate dorsally. 



Measurements. — Length : pronotum, $ , G mm., 9 , 6.5 mm. ; 

 anterior femora, $ , 11 mm., $ , 12 mm. ; posterior femora, 

 S , 20 mm., 9 , 22 mm. ; tegmina, S , 30 mm., 9 , 33 mm. ; 

 subgenital plate, S , including apical flanges, 10 mm., 9 , 3 

 mm. ; cerci, $ , 5 mm., 9 , 4 mm. ; ovipositor, 18 mm. Width : 

 pronotum posteriorly, $ , 4 mm., 9 , 4.5 mm. ; tegmina at mid- 

 dle, $ , 7 mm., 9 , 8 mm. ; posterior femora at widest point, 

 $ , 3.50 mm., 9 , 2.75 mm. ; ovipositor at middle, 3 mm. 



Described from one S and one 9 . Type, S , January 12, 

 1906. Iconnicoff. Allotype, 9 , same date as the type. 



Type and allotype in the collection of the U. S. National 

 Museum. 



Cat. No. 21334, U. S. Nat. Mus. 



Arrhenotettix, new genus. 



This is a member of Brunner's group Cocconoti and in his 

 keys runs out to Homalaspis, from which it differs by having 

 the genicular lobes of the anterior femora unarmed, by having 

 the basal segment of the antenna apically tuberculate, by the 

 shorter and broader ovipositor and in the armature of the legs, 

 that of the ventral surface of the posterior femora of the male 

 being very remarkable. 



Description. — Head about as broad as the anterior part of 

 the pronotum ; face strongly retreating ; fastigium of the vertex 

 not attaining the tip of the antennal scrobse, elongate-triangular, 



