CERAMBYCID^E 251 



eyes separated by very nearly their own width, the antennae ( 9 ) 

 slender, extending barely beyond basal fourth of the elytra, 20- 

 jointed; prothorax very large, much more than twice as wide as 

 long, convex, finely, sparsely punctate, coarsely and irregularly 

 toward the sides, the latter parallel, but very slightly angulated 

 well before the middle, the angle even obtusely subprominent and 

 not spiniform, the anterior right, not rounded, moderately pro- 

 jecting, the basal angles right, rather blunt, not prominent; 

 elytra parallel, narrowing slightly behind the middle, but little 

 more than one-half longer than wide, only about a fifth wider than 

 the prothorax, the raised lines very feeble; abdomen concolorous, 

 black or nearly so; tarsi slender though less so than in parviceps. 

 Length (9 ) 32.0 mm.; width 13.0 mm. Texas. 



transversus n. subsp. 



In this group the eyes seem to be much more widely separated 

 in the female than in the male, a feature not particularly evident in 

 the other groups. The difference in form of the head and pro- 

 thorax of parviceps and transversus is extreme, and I have but little 

 doubt that they are specifically different. The female above at- 

 tached to the male representative of fissicornis is probably different 

 at least subspecifically. In the type of transversus the twelfth and 

 thirteenth joints of both antennae are completely amalgamated on 

 the upper surface, without trace of suture, a singular malformation. 

 In the male of fissicornis the longitudinal impression of the elytra 

 at outer third is very pronounced but it is shallow or obsolete in the 

 three females described. 



The Japanese insularis Mots., resembles somewhat our species 

 of the pocularis type, but the antennae of the male are longer, extend- 

 ing almost to the end of the elytra; they are only very moderately 

 stout, feebly tapering and not imbricate though serrate; my two 

 males represent two subspecies, one with very short prothorax and 

 eyes separated by but little more than a fourth their width, and the 

 other with larger head, less transverse prothorax and eyes separated 

 by three-fifths their width; there are also other very evident dif- 

 ferences. 



Prionina n. gen. 



The few species constituting this genus differ from Prionus in 

 two essential characters affecting the antennae and tarsi. The outer 

 joints of the antennae, presumably in both sexes but certainly in 

 the male, are less compressed and have their dull and chagrined 

 surfaces even and wholly devoid of the longitudinal anastomosing 



