— 481 — 



thc tympanura. Abdomen evenly tapering, shorter thau tlie liiiid 

 femora: siipraaiial jjlate triangulär, without irregularities save near 

 ils base where there is a short, coarse, longitudinal groove, the rest 

 of its surface rugose. Cerci conical, not quite as long as the plate. 

 Valves of the o\ipositor short, blunt and without definite Serratien. 

 Himl femora rather long and slender, extending beyond the tip of 

 the abdomen by the length of the geniculae, their carmae nodulose, 

 especially the superior ones. Hind tibiae slender, seven-spined exter- 

 nally. Prosternai spine slender, acuminate, straight. 



General color above dark wood-brown witli an olivaceous tinge 

 to the legs and the apical jjortion of the abdomen, beneath paler. 

 Front and sides of the head below the eyes dirty testaceous with 

 the pits piceous. Occiput provided with two moderately wide diver- 

 ging pale unes which continue to the posterior edge of the prono- 

 tum and indicate the probable position of lateral carinae were any 

 présent; lower portion of the sides of the pronotum and oblique 

 patelles on the pleura in advance of the middle and bind coxae also 

 pallid. Hind tibiae dirty gray-brown, the spines a little paler with 

 black tips. The terminal flattened joints of the palpi ivory-white. 

 Antennae vinous on basai half becoming daik brown apically. 



Length of body, ?, 29 mm., of pronotum, 5,85 mm., of teg- 

 mina, 4,75 шт., of bind femora, 18 mm., of antennae, 17 mm. 



Hab. Peru, at a point about fifty-five miles east and a little 

 to the south of Cerro de Pasco. 



The tyjje alone bas been seen. 



Ommatoiampis eburnifrons, sp. n. 



The présent species is of medium size, almost apterous, mode- 

 rately robust, subcyhndrical in form, and has the front below 

 the ocellus and above the clypeus, the cheeks below the eyes 

 and the lower third or two-fifths of the sides of the pronotum 

 dirty ivory-white or pale flavous bordered above with piceous. 

 The entire body is glabrous in appearance although very coar- 

 sely punctate, and with but a sparse covering of paie, short 

 hairs. In gênerai color the insect is brunneo-ferruginous on the 

 occiput, pronotum and basai half of the abdomen — a little darker 

 on the abdomen — becoming olivaceous apically on the latter and 

 below. The legs are olivaceous, the hind tibiae becoming very pale 

 greenish-yellow on their apical third, the spines, of which the 



.Bl 



