586 PROCESDINOS of the national museum. vol.45. 



severed by all three transverse sulci, tlie last plainly in advance of 

 the middle, hind border gently obtusangulate, the apex rounded. 

 Tegmina ample, tapering but little apically, extending beyond the 

 tip of the abdomen and apex of the hind femora nearly double their 

 width; wings broad. Anterior and middle legs rather slender, the 

 hind femora short, robust at base, slender apically, the external 

 carinse prominent; hind tibiae noticeably sinuose and also provided 

 with prominent external carinas, 9-spined externally, 11-spined 

 internally, the inner ones decidedly larger than the outer. Pros- 

 ternal spine moderately coarse, decidedly transverse, the sides 

 parallel, the apex broadly rounded, gently directed caudad but not 

 curved. 



General color brunneo-cinereous, strongly maculate, mottled, 

 streaked and flecked with fuscous. Tegmina coarsely maculate on 

 disk, the maculae on the apical half tending to form obliquely trans- 

 verse bands, anterior and posterior areas also distinctly mottled 

 with the same color. Pronotum plainly marked with alternate 

 longitudinal pallid and fuscous bands, the middle of the lateral 

 lobes provided with a quadrate pallid macula. Vertex and occiput 

 showing traces of lateral fuscous lines, between and below these lines 

 cinereous except for an inconspicuous fuscous line extending partly 

 across the cheeks below each eye. Hind femora with a pallid external 

 disk; upper margin showing traces of two transverse fuscous bands, 

 lunules and base of tibiae black, the genicular lobes dirty white, the 

 carinae very conspicuously black mottled; the tibiae cinereo-purple, 

 the spines pale, black-tipped. Hind margin of abdominal segments 

 prominently dotted with fuscous. Wings pellucid, becoming yel- 

 lowish basally, the principal veins and the transverse ones on apical 

 portion infuscated. 



Length of body, female, 42 mm.; of pronotum, 9.5 mm.; of 

 tegmina, 43 mm.; of hind femora, 23.5 mm. 



Habitat. — The only specimen at hand was taken at Chuquibamba, 

 Peru, during October, 1911. The label bears the note "10,000 feet 

 (Yale Peru expedition)." 



Type.—Csit. No. 15598, U.S.N.M. 



This insect is rather closely related to both S. columlina Thunberg 

 and S. interrita Scudder, the former species coming from Colombia 

 and the latter from Peru. It is also related to an insect found in 

 the windward of the West India Islands and Trinidad, and that has 

 been referred erroneously to Thunberg's species. It is likewise 

 related to 8. maculipennis Bruner, which latter locust wUl shortly be 

 described in a forthcoming paper soon to be published in the current 

 volume of the Annals of the Carnegie Museum. 



