178 M. JACOBY 



cate at the apex, elytra opaque, punctured in closely approached, 

 not very regular rows, the interstices at the base slightly wrinkled, 

 the suturai portion at the apex, impunctate, the humeral portion 

 in shape of an elongate subquadrate patch, extending to the 

 middle, white, with a slight fulvous tint, this is preceded by a 

 black band, which extends from the middle of the base down- 

 wards, but curves at right angles to the sides, the suture and 

 the apex remain of the white ground colour, forming another 

 regular narrow band which curves round at the apex, limiting 

 the black band posteriorly and laterally, the under side and the 

 anterior femora black, sides of the abdomen and the posterior 

 femora as well as the sides of the pygidium white, tibiae and 

 tarsi more or less tiavous, streaked with black above, the poste- 

 rior femora have also a black spot placed at their outer side. 



This handsomely marked species has perhaps for its nearest 

 ally S. Montezuma, Suff. in which however there is no fulvous 

 patch or band at the shoulders, the female varies much in the 

 coloration of the head and thorax from the male, and the eyes, 

 are much more widely separated, the head is black with a large 

 subquadrate fulvous patch at the middle, the black bands of the 

 thorax are greatly reduced, being replaced by fulvous at the 

 sides, the lateral margins are narrowly yellowish with a black 

 spot within the fulvous portion and the humeral patch of the 

 elytra is of a decided fulvous, not whitish colour, lastly the 

 intermediate femora have likewise a white spot at the apex, 

 while the black spot placed within the white colour of the po- 

 sterior femora is much larger. 



"2. Pachybrachys paraguayensis , sp. n. Pale tiavous or te- 

 staceous, the breast blackish, head closely punctured, the vertex 

 and a triangular spot at the middle, black, thorax very closely 

 punctured, with three more or less distinct brown bands and 

 numerous tiavous spots, elytra with dark irregular rows of 

 punctures, partly united forming black spots, one on the shoulder, 

 one near the suture anteriorly and several others near the apex, 

 legs spotted with piceous. 



Length 4 mill. 



