68 Annals of the Carnegie Museum. 



bb. Knees of hind femora black. Spines of hind tibiae testaceous, or yellow at 



base. [Ecuador.] minor Giglio-Tos. 



.1.1. Antennae ensiform. Fastigium of the vertex subhorizontal. [Panama.] 



festa Giglio-Tos. 



1 02. Hisychius brasiliensis sp. nov. 



Most closely related to //. nigrispinus Stal, from which it may 

 readily be recognized by its much smaller size and the absence of the 

 black patch at the tympanum, and by the less conspicuous alternating 

 teeth on the lower carina bordering the external pagina of the hind 

 femora. General color olivaceous brown. Antennae infuscated, with 

 orange-yellow tips. 



Rather robust, fusiform, strongly, coarsely, and rugosely punctured 

 on head and thorax; on the abdomen less strongly so. Entire insect 

 sparsely hirsute, more abundantly so on the hind tibise and tarsi. 

 Head fairly large, about as wide as the front edge of the pronotum, the 

 occiput somewhat punctulate; eyes a little prominent, elliptical, in 

 the female a trifle longer than the anterior edge of the cheeks imme- 

 diately beneath. Vertex somewhat wider than the diameter of the 

 first antennal joint, widely and profoundly sulcate, the sides being 

 bounded by rather coarse and prominent longitudinal carina?, which 

 project backwards upon the anterior portion of the occiput' as far 

 as does the deflexed fastigium anteriorly, the latter a little wider than 

 long and profoundly sulcate, the sulcation being continuous with 

 that of the upper portion of the frontal costa, the lateral walls very 

 gross and somewhat sinuose; frontal costa fairly prominent above 

 the ocellus and between the antennae, almost obliterated below; 

 lateral or facial carina? prominent, quite strongly divergent, and 

 reaching the base of the mandibles upon which they continue as 

 coarse angles. Antennae filiform, very slender, nearly as long as the 

 hind femora, their immediate two or three apical segments orange- 

 yellow. Pronotum evenly rounded above and free from carina?. 

 rather strongly divergent posteriorly; hind margin truncate, the 

 front margin gently sinuose; all three transverse sulci prominent, 

 and a fourth near front margin; hind lobe very short, not over one- 

 fourth the length of the pronotum; hind and front margins as well as 

 hind margin of mesothorax studded with fair-sized polished tuber- 

 cles. Auditory apparatus low down and inconspicuous, almost 

 covered by the base of hind femora. Hind femora robust, a very 

 little surpassing the apex of the abdomen, having all the carina? 



