INSECUTOR INSCITI^ MENSTRUUS 29 



tubercle, separated from the fastigium of the vertex by a 

 rounded notch ; antennas with the basal segment armed with an 

 apical well-developed but blunt spine on the inner dorsolateral 

 margin. Pronotum slightly rugose on the disk, more so on the 

 metazona ; mesozona with a large rounded tubercle on each side 

 of the median line ; lateral carinse present on the metanotum 

 only and there broadly rounded but well elevated, anteriorly 

 forming a rounded shoulder ; transverse sulci broad and con- 

 spicuous, especially the posterior one, which is situated at the 

 middle of the prothorax, curves frontward below and is inter- 

 sected at the middle on the dorsal line by a short longitudinal 

 sulcus ; prozona with a rounded tubercle on the middle of the 

 anterior margin ; posterior margin of pronotal disk broadly 

 rounded, the edge smooth and somewhat thickened ; lateral 

 lobes considerably longer than high, the lower margins straight 

 and horizontal, the anterior angles rectangular ; humeral sinus 

 deep, rounded-rectangular ; prosternum armed with a pair of 

 moderately long spines ; meso- and metasternum transverse, 

 rhe lobes rounded and lateral, not at all prolonged posteriorly ; 

 mesosternal pits considerably farther separated from each 

 other than the distance from them to the lateral margins of the 

 sternum and separated by a transverse furrow, those of the 

 metasternum separated scarcely farther than the distance to the 

 edge of the sternum. Legs moderately long and stout, the an- 

 terior femora but one-third longer than the pronotum ; anterior 

 tibiae flat and unarmed above, beneath on each margin armed 

 with several small spines, the foramina shell shaped and very 

 moderately expanded ; middle tibiae flat above and unarmed on 

 the cephalic margin, the opposite margin armed with a single 

 short subbasal spine, beneath armed on both margins with sev- 

 eral short stout spines ; posterior tibiae armed above and below 

 on both margins with moderately stout spines, the inner ventral 

 margin spined only on about the apical half, no apical spine on 

 the outer dorsal margin ; all femora rounded and unarmed 

 above, beneath sulcate and armed on the cephalic margin only, 

 three or four spines on the anterior femora, four larger flat- 

 tened ones on the middle ones and seven still larger ones on the 

 posterior femora, those toward the apex larger and all curved 



