54 Annals of the Carnegie Museum. 



disc rounded or convex, and bearing a longitudinal sulcus throughout; 

 the frontal costa prominent, a little ampliated above the antennae, 

 profoundly sulcata throughout, and continuous to the clypeus. 

 Mesosternal lobes with their inner edges touching for a considerable 

 portion of their length. Prosternal spine of moderate robustness, 

 cylindrical, straight, its apex blunt. Tegmina acuminate, extending 

 about one-fifth of their length beyond the tip of the abdomen. Ab- 

 domen gently tapering, the supra-anal plate scutellate, its apical 

 third narrower, triangular, flat, and with its apex rounded. Cerci of 

 moderate size, strongly curved upwards, the apex black. Hind tibiae 

 strongly dilated, their lateral edges acute, seven- to eight-spined 

 externally. 



Length of body, cf, 27 mm.; of pronotum, 6 mm.; of tegmina, 23 

 mm.; of hind femora, 14.5 mm. 



Habitat: Upper Mamore River in the Department of Santa Cruz, 

 Bolivia, December, 1913. The type and a second male were collected 

 at an altitude of 200 meters above sea-level by J. Steinbach. C. M. 

 Ace. No. 5061. 



98. Tucayaca normalis sp. no v. 



Very similar in general appearance to the preceding, but differing 

 from it in its slightly larger size, the somewhat longer and differently 

 shaped fastigium of the vertex, and in the broader and apically rounded 

 last ventral segment of the male abdomen. 



Head large, elongate, somewhat ascending, the front strongly 

 retreating, viewed in profile nearly straight; the fastigium of the vertex 

 moderately large, about two-thirds the length of the longest diameter 

 of the eyes; its sides parallel at the base for a little less than one-half 

 of its length, beyond this nearly straight and somewhat convergent 

 to the narrowly rounded apex, the lateral edges heavily carinated; 

 the disc viewed from the side strongly and arcuately convex, its 

 middle longitudinally, evenly, and roundly sulcate. Frontal costa 

 prominent, with the lateral walls bowed, and forming a rather wide 

 ovate loop above between the antennae, from this point very gently 

 and evenly divergent below, reaching the clypeus, profoundly sulcate 

 throughout. Antennae rather heavy, slightly ensiform, somewhat 

 longer than the head and pronotum combined, the basal joint rather 

 robust, scarcely as long as wide, concolorous. Vertex as wide as the 

 basal antennal joint, depressed in front, separated from the fastigium 



