— 488 — 



put rugose, provided anteriorly with a median carina that extends 

 forward tliroufjh the vertex almost to tlie front eilge of the eyes, 

 most api)areiit in tlie female. Pronotum evenly and gently divergent 

 posteriorly in the female, the anterior lobe with the sides parallel in the 

 maie, the hind lobe a little less than one-half the length of the front 

 one: the anterior edge gently undulate, the posterior niargin straight. 

 Abdomen with the first segment as large as the metathorax, very pro- 

 fusely, coarsely and profoundly pitted, the remaining segments 

 rapidly diminishing in size and much smoother. Auditory apparatus 

 large, nearly cii'cular. Posterior femora uioderately robust and sur- 

 passing the abdomen in both sexes, in the maie nearly one-half, in 

 the female about one-third of their length, theu- carinae more or 

 less strongly toothed or serrated, especially in the maies where the 

 lower outer one is provided with three or more long, strong spines; 

 hind tibiae provided with seven spines externally and nine internally. 

 Maie abdomen strongly upturned at the apex, the last ventral seg- 

 ment short and conical; the supraanal plate plain, large, triangulär; 

 preceding segment simple, without granulär appendages; cerci heavj'; 

 curved inward, furcate, the anterior prong largest and likewise for- 

 ked. Prosternai spine robust at base, with an anteriorly projecting 

 rather acute apex. 



Length of body, cf, 15 mm., $, -22 mm.; of pronotum, </, 

 4 mm., ç, 5.8 nim.; of bind femora, cf, 12 mm-, ç, 14.5 mm. 



Hab. The collection contains four mature and four imma- 

 ture spécimens that were taken at a point in Peru located about 

 fiity miles to the south and a little east of Cerro de Pasco and 

 1800 meters above sea-level. 



The présent species belongs to S t â Г s section a und approaches 

 his B. pilosa in some respects, but differs quite decidedly in others. 



