1874.] 273 [Scudder. 



26. Ommatolampis aptera nov. sp. 



This species differs most conspicuously from the preceding in the 

 total absence of tegmina and wings, but also in the following particu- 

 lars : the females have no longitudinal stripe on the head and prono- 

 tum, the pronotum and abdomen are less heavily and less regularly 

 rugose, the pronotum has no trace of a dorsal carina, the upper sur- 

 face of the hind femora are deeply punctate, the whole outer surface 

 of the same femora are deeply infuscated, the tubercle of the vertex 

 is not sulcate, the space between the eyes is narrower than the first 

 antennal joint, and the last palpal joint is not so conspicuously 

 ovate. The male, so far as it can, differs similarly from the male of 

 0. leucoptera; the sides of the head, the pleura of the pro- and meso- 

 thorax and the lower third of the lateral lobes of the pronotum are 

 pale yellow ; the cerci are compressed laminate, rather long, bent in- 

 ward considerably in the middle, beyond the middle slenderer, a lit- 

 tle upturned, and furnished on the posterior edge, before the tip, with 

 a triangular laminate tooth lying in the plane of this part of the ap- 

 pendage. 



Length of body, <S 15, ? 23 mm.; of antenna?, cf 13.5, ? 9 mm.; 

 of hind tibia?, cf 10, ? 12 mm. 1 cf, 2 ?, Eastern slope of the Peru- 

 vian Andes. 



27. Ommatolampis nigroguttata nov. sp. 



Brownish ferruginous ; antenna? black, summit of head and whole o f 

 thorax punctured and rugose as the prcnotum is in 0. leucoptem ; the 

 tegmina black with ferruginous veins, eaving a clear, oval, black patch 

 at the extremity of the upper margin ; hind femora slightly infuscated 

 at tip. Tubercle of vertex with a shallow, but distinct sulcation; the 

 space between the eyes about equal to the width of the first antennal 

 joint, scarcely narrower in the male than in the female ; last palpal 

 joint ovate, but not so conspicuously as in 0. leucoptera. Pronotum 

 with a stout but slight median carina, and very slight but coarse 

 lateral carina^ the front border with a slight median notch. Teo-mina 

 oblong obovate, the upper border roundly arched in the middle, and 

 on this account only a little more than twice as long as broad. Cerci 

 of female simple, short, stout, conical ; those of male similar, but a 

 little produced at tip, and with a distinct superior perforation next 

 the base. The male resembles 'the female in all the peculiarities 

 of sculpture and marking, whether of the head, pronotum or teg- 

 mina. 



Length of body, ? 25 mm.; of antennas, cf 10, ? 11 mm.; of 



PROCEEDINGS B. S. N. H. — VOL. XVII. 18 MARCH, 1875. 



