INSECUTOR INSCITI^ MENSTRUUS ' 49 



dorsally sulcate and without distinct basal tubercles; eyes 

 prominent ; basal segment of the antennae furnished apically 

 on the inner side with a prominent acutely conical tubercle, 

 Pronotum smooth, the disk rounded into the sides without a 

 sign of lateral caringe, the anterior and posterior margins 

 broadly rounded ; transverse sulci moderately developed ; lateral 

 lobes slightly developed, more than twice as long as high, the 

 lower margins horizontal and a little turned outward ; humeral 

 sinus none ; prosternum unarmed ; meso- and metasternal lobes 

 not prolonged, rounded, the pits of the metasternum merged 

 into one almost circular hole. Tegmina short, a little more 

 than twice as long as the pronotum, the tympanum of the male 

 well developed but not very large, projecting somewhat beyond 

 the inner margin of the tegmina, the stridulating vein stout and 

 projected a little farther than the speculum as a rounded lobe 

 similar to the type figured under the following genus (PI. II, 

 fig. 19) ; wings broad and slightly fuliginous, when closed just 

 reaching the tips of the tegmina. Legs moderately slender, the 

 anterior femora but little longer than the pronotum ; all femora 

 unarmed above, beneath armed with one to three spines on the 

 cephalic margin only in the fore and middle legs and four on 

 the posterior ones, the last two of which are much larger than 

 the basal two, in the male the penultimate one being of unusual 

 length, almost twice as long as the femoral depth at the point 

 of attachment (PI. II, fig. 18) ; genicular arcs of the posterior 

 femora and the caudal one of the intermediate femora spined, 

 the others rounded ; all tibise armed beneath on both margins 

 with several spines ; anterior tibiae flat and unarmed above, the 

 foramina shell-shaped, moderately expanded ; middle tibia 

 armed above on the caudal margin only with several small 

 spines ; posterior tibiae armed above on both margins for nearly 

 the entire length, an apical spine on the caudal margin only. 

 Abdomen plump and slightly compressed ; subgenital plate of 

 both sexes moderately narrowed apically and broadly notched, 

 in the male each side bearing a cylindrical pointed style five or 

 six times as long as broad ; supraanal plate irregular, dorsally 

 dimpled, or longitudinally sulcate ; cerci of male stout, cylin- 

 drical, about twice as long as broad, apically broadly rounded 



