326 PROCEEDINGS OF THE ACADEMY OF [May, 



caudad by an obtuse-angulate series of tubercles, passing cephalad 

 into the frontal costa without interruption; frontal costa when seen 

 from the side arcuate subrostrate between the antennae, obsolete 

 ventrad, dorsad with a V-sectioned sulcation; eyes subglobose, their 

 length contained about one and one-third times in the length of the 

 infra-ocular gense; antennae incomplete, Pronotum with the median 

 carina indicated only on the prozona and there by a tuberculate 

 ridge, slightly arcuate in profile; lateral angles indicated on the 

 metazona and there only by bluntly rounded, low-tuberculate shoul- 



Fig. 12. — Pachyossa signata n. gen. and sp. Lateral view of type. (X 3.) 



ders, on the prozona no trace of the angles exists; transyerse sulci 

 weak, indications of four present, only the caudal at all distinctly 

 marked; lateral lobes with the greatest depth contained about one 

 and one-third times in the greatest length of the same, caudal margin 

 oblique subtruncate, the ventro-caudal angle yery broadly rounded 

 and extending considerably yentrad of the yentro-cephalic angle, 

 which is obtuse. Tegmina nearly two and one-half times as long as 

 the pronotum, the greatest width at the proximal fourth and con- 

 tained oyer three times in the length, thence rather eyenly tapering 

 to the rather narrowly rounded apex; marginal field broad at the 

 proximal fourth, there slightly more than a third the total width of 

 the tegmen; sutural margin yery slightly but regularly arcuate; the 

 transyerse yein-groups which form subnodose eleyations are formed 

 by a number of yery short transyerse yeinlets coalescing and filling 

 up the intervening cells, the contrast between these groups and the 

 distinctly outlined cells between the elevations bringing them into 

 greater prominence. AVings with their length subequal to that of 

 the tegmina when both are in repose, the greatest width contained 



