358 Mi\ J. O. Westwood's Illuatrations 



This curious species is about the size of Cacostomus 

 squamosus, agreeing with it in the small scales with which 

 it is everjAvhere covered ; the mandibles, eyes (having only 

 a slight incision in front), and especially the remarkable 

 mandibles, however, entirely separate it from that genus. 

 The head is smaller than the prothorax, transverse, with the 

 sides nearly straight and parallel ; the eyes are not promi- 

 nent, and the sides of the head in fi-ont of the eyes form 

 an obtuse angle ; the fi-ont of the head is deeply emarginate 

 and the middle of the disk of the head between the eyes 

 is marked by two raised spaces. The antennas are of 

 moderate length, the three terminal joints comparatively 

 small, the preceding (seventh) joint not being larger than 

 the sixth ; the mandibles are about the length of the head, 

 they are flat above, the basal half being dilated into a large 

 triangular tooth, of "svhlch the anterior margin is slightly 

 produced in the middle ; the inner basal angle is produced 

 inwardly into an acute point, and the outer base extends 

 outwardly, forming a right angle ; beyond the middle they 

 are suddenly angulated inwardly, terminating in an acute 

 point; their upper surface is punctured and setose; the 

 mentum is transverse, deeply punctured, with the anterior 

 lateral angles rounded, the extremity of the labial palpi 

 being alone visible beyond its fore margin. The maxillae 

 have the outer lobe very setose, the inner lobe minute and 

 simple. The prothorax is wider than long, the lateral 

 margin rounded and seiTated, the posterior half of the 

 lateral margin being obliquely truncate ; the middle of the 

 disk in front has a slight longitudinal depression ; the 

 scutellum is minute and semicircular. The elytra are 

 rather narrower at the base than the prothorax, and have 

 the anterior lateral angles angulated ; the disk is opake, 

 being covered with minute punctures, each emitting a 

 luteous squamula ; on each may also be perceived four ill- 

 defined, slender, longitudinal, slightly-raised carina. The 

 body beneath is covered with coarser setigerous punctures, 

 except on the abdomen, where they are very fine and small. 

 The prostemum Is simple, gradually narrowed between the 

 bases of the fore legs, behind which it does not form a 

 produced raised angle. The anterior tibla3 are moderately 

 long and slender, the apex externaEy being prolonged and 

 terminated by two spines. The four posterior tibijfi are 

 externally unarmed, and the tarsi are clothed on the under- 

 side with lono; fulvous hairs. 



