274 



16. Hyphidrus maculatus. Short, ovate, gibbous, coarsely punc- 

 tate : head and antennae testaceous : prothorax fuscous : elytra fus- 

 cous, with the humeral angle, the anterior half of the lateral margin, 

 a longitudinal abbreviated line near the centre of the suture, one on 

 the middle of the disk connected with a triangular transverse spot on 

 the margin, and two small triangular spots within the apex, testace- 

 ous: body beneath and legs fuscous. Length 2 lines, breadth l^-line, 

 St. Jago. (Id. 12.) 



17. Hydroporus Darwinii. Thickly punctured : head pale testa- 

 ceous, narrowly black behind : prothorax pale testaceous, narrowly 

 margined with fuscous and having two small fuscous spots towards 

 its middle : elytra black, the anterior margin, two angular marginal 

 spots, a line interrupted in the middle next the suture, and about four 

 very slender and much interrupted lines on each, testaceous. Length 

 2 lines, breadth 1 line. King George's Sound, Australia. (Id. 13.) 



18. Hydroporus W-lineatus. Thickly punctured : head and pro- 

 thorax nearly as in the last : elytra yellow, with the suture and five 

 regular lines on each, black : body beneath and legs yellow. Length 

 2 lines, breadth I line. Tierra del Fuego. (Id. 13.) 



19. Hydroporus ohscurus. Opaque, fuscous, with the antennge, pro- 

 thorax and legs yellow. Length f line, breadth f line. Rio de Ja- 

 neiro. (Id. 14). 



20. Hydroporus niiidus. Shining, coarsely punctured ; fuscous, 

 with the head, prothorax (except in the middle), antennae and legs, 

 yellow. Length f line, breadth f line. Rio de Janeiro. (Id. 14.) 



21. Hydroporomorpha parallela. This new genus differs from Hy- 

 droporus in the structure of the internal maxillary and labipalpi, and 

 the presence of a scutellum : the species is obtuse anteriorly, acute 

 posteriorly, rufous, with the anterior and posterior margins of the pro- 

 thorax and the elytra (with the exception of the apex and margins) 

 fuscous. Length 2 lines, breadth f line. Rio de Janeiro. (Id. 15, 

 tab. 1, fig. 3). 



22. Anodocheilus maculatus. This new genus differs from Hydro- 

 porus in the structure of its palpi and in the want of a tooth in the 

 centre of its mentum : the species is coarsely punctured : yellow; ely- 

 tra fuscous, with the external margin, two transverse patches and the 

 apex yellow ; beneath fuscous. Length f line, breadth f line. Rio 

 de Janeiro. (Id. 16, tab. 1, fig. 4). 



23. Desmopachria nitlda. This new genus is closely allied to Hy- 

 grotus of Stephens, but is distinguished by its antennae and palpi ; 

 the former are somewhat moniliform and incrassated externally : the 



