26 



of pronotum, d 18.5, 9 28 mm.; of tegmina, c? 35, ? 42 mm.; of 

 wings, d" 29.5, ? 38.5 mm. ; breadth of wing, cf 28, ? 33 mm. ; length 

 of hind tibiae, d" 28.5 ? 37 mm. 1 d". Eastern slope of the Peruvian 

 Andes. 2 ? , Peruvian Maranon . 

 25. Ommatolampis leucoptera nov. sp. 

 Female. Ferruginous brown; a dull pale yellowish streak passes 

 from the upper border of each eye to the base of the tegmina of the 

 same side, generally very indistinct upon the head ; tip of the hind 

 femora and base of hind tibise strongly infuscated, the rest of the 

 hind tibiae and hind tarsi dull luteous. Tubercle of the vertex with 

 a shallow longitudinal median sulcation ; the eyes separated above by 

 the width of the first antennal joint ; last palpal joint conspicuously 

 flattened, ovate; apical half of antennse infuscated. Pronotum with- 

 out lateral carinae, and a barely perceptible dorsal carina, the front 

 border very slightly notched in the middle, the hind margin straight ; 

 the whole surface, as well as that of the abdomen, rugose, with rather 

 deep, large, roundish pits having sharply defined though rounded 

 walls. Tegmina oblong obovate, rounded at the tip, about four times 

 as long as broad, pale yellowish white with deep large punctures and 

 stabs. Wings not half as long as the tegmina. Distal half of spines 

 of hind legs black ; claws and pads black. 



Male. In general color the male is mu(rh paler, being dull brown- 

 ish-yellow, without any trace of the lateral stripe on head and prono- 

 tum; the apical two-thirds of the antennae are infuscated, but only the 

 apical half of tiie claws, while the pads are scarcely darker than the 

 tibiae. In addition to these colorational distinctions the tubercle of 

 the vertex is deeply sulcate above, the space between the eyes is dis- 

 tinctly less than the width of the basal antennal joint, the pronotum 

 and abdomen are far less rugose, pitted profusely with comparatively 

 small and shallow indentations without shar[)ly defined walls, the 

 pronotum has no trace of a dorsal carina, and the tegmina are broadly 

 obovate, scarcely twice as long as broad. 1 should have considered 

 the sexes distinct species, did not precisely similar distinctions hold 

 in the one next to be described. 



Cerci short, stout, trigono-pyramidal, the middle of the inner sur- 

 face with a flattened, pyriform, laminate tooth, directed inward, the 

 produced apex rounded, the plane of the whole vertical. 



Length of body cT 20.5, ? 31 mm.; of antennae, <S 17, ? 15 mm.; 

 of tegmina. d" ? 5 mm.; of hind tibiae, <J 14, ? 18 mm. 1 d', 

 Peruvian Maraiion; 3 ?, Eastern slope of the Peruvian Andes. 



