12 INSECUTOR INSCITI^ MENSTRUUS 



just posterior of this pair of expansions is a pair of very 

 large stout spines with serrated edges, and in front, between 

 the antennae, are two groups of a few more elongate tuber- 

 cles, the longest almost a blunt spine ; antennae with the basal 

 two segments considerably enlarged, the basal one with a 

 large double pointed tubercle on the upper apical margin ; 

 eyes slightly oval and very prominent, projecting more than 

 half their depth beyond the surface of the head. Pronotum 

 quadrate, armed above with a pair of very large acute tri- 

 angular processes, or spines, and other smaller spinelike 

 tubercles and rugosities ; mesonotum armed laterally with 

 several long stout simple spines and above with two pairs 

 of acutely pointed elongate triangular plates or broad based 

 spines with serrated edges ; metanotum armed above near 

 the cephalic margin with a pair of very large double pointed, 

 tliick based spines and on each side over the posterior coxae 

 with a flat flange terminated in three stout spines ; median 

 segment about two-thirds as long as the metanotum and 

 moderately distinct, armed above near the cephalic margin 

 with a single stout median spine. Abdomen triangular in cross 

 section except the sixth and seventh segments which are flat- 

 tened above ; the seventh and eighth segments are much broad- 

 ened and the ninth is small, narrow, and turned up to a nearly 

 vertical position, its narrowness due to lateral folding; the 

 whole abdomen is covered with small tubercles and the basal 

 three segments are each armed with a pair of large simple dor- 

 solaterally located spines ; operculum broad, compressed vent- 

 rally and reaching the tip of the abdomen, the surface rough. 

 Legs moderately stout ; femora and tibiae all unarmed mesi- 

 ally beneath, but the femora are armed laterally with a few 

 short blunt ventral spines on both sides ; above the femora 

 and tibiae are armed with very broad based spines, those on 

 the tibiae small, but mere lamellations, being without pointed 

 apices, but two or three in number and in a single row, but 

 those of the femora are larger, acutely pointed and in two 

 rows of two to four pairs ; anterior femora scarcely at all 

 curved basally ; metatarsi about half as long as the combined 



