192 Mr. W. S. Dallas's Notice 



longer than the first ; fourth as long as the first. Thorax inclined 

 anteriorly ; the anterior margin strongly emarginate, almost in a 

 semicircle, for the reception of the head ; the lateral angles very 

 prominent, acute, and curved forwards, their points reaching 

 beyond the line of the anterior angles ; the antero-lateral margins 

 are strongly serrated, and there is a distinct tooth behind each 

 lateral angle. Scutellmn long, passing the centre of the abdomen, 

 the apex narrowed and rounded. Mcmhyme of elytra reaching 

 beyond the apex of the abdomen, with eight longitudinal nervures, 

 of which the third, fourth and fifth from the inner margin spring 

 from a basal cell ; the sixth and seventh are united at the base, 

 and the eighth is very short. Abdomen extending a little beyond the 

 elytra on each side ; beneath strongly keeled, with a strong basal 

 spine, which extends forwards as far as the middle of the space 

 between the intermediate and anterior pairs of legs. Vulvar appa- 

 ratus as in Rhaphigaster, &c. Mesosternum with a slight keel in 

 the centre. Legs rather slender, the posterior longest. Tih'ice 

 channelled on the outside, and fringed with small stiff hairs, espe- 

 cially towards the apex. Tarsi (fig. 5 c) pilose, 3-jointed, basal 

 and terminal joints equal ; second very short. Claws and p)ulvilli 

 moderate. 



The name Prionochilus refers to the serrated margin of the pro- 

 thorax. 



Sp. 6. Rh. {Prionochilus), 8 pu7iclatus. (PI. XIX. fig. 5.) 



R. (P.) fusco-testaceus, nigro-punctatus ; thoracis disco, scu- 

 tellique basi, punctis 4 majoribus nigris, his in linea trans- 

 versa dispositis. $ . 



Long. lin. 10| ; lat. thor. lin. 6. 



Ovate, testaceous brown, opaque, beneath paler. Above thickly 

 and finely punctured with black. Prothorax strongly rugose- 

 punctate, with four black dots arranged in a transverse line across 

 the disc, from the base of one lateral angle to the other ; the 

 marginal serrations yellowish. Scutellum less closely punctured 

 than the thorax, distinctly rugose, with four black dots at the 

 base, placed two close to the posterior margin of the prothorax, 

 about the same distance from each other as from the lateral angles 

 of the scutellum, and two behind these, forming with them a small 

 square. On each side of the tip of the scutellum is a small yellow 

 impunctate spot. Elytra with the punctures arranged somewhat 

 nebularly ; a small impunctate spot on the disc, a little behind 

 the middle. Membrane transparent, with a brownish tinge. 



