484 SERR1C0ENIA. 



17. longicornis, and perhaps an extreme form of that species, but differing from it in 

 its less elongate shape, the shorter and stouter antennae in the male, and the less 

 parallel thorax in this sex. From H. candezei it may be separated by the long and 

 strongly divergent hind angles of the thorax ; from H. parvulus by the much larger 

 size and the more parallel thorax ; and from H. amitinus by the less elongate thorax, 

 with more produced hind angles. 



10. Hemicrepidius patruelis. (Tab. XXI. fig. 11, 2 .) 



Elongate, narrow, slightly shining; black or pitchy-black, the hind angles of the prothorax in the male obscure 

 ferruginous ; the prothorax in the female rufo-testaceous, with an oval black patch on the disc, extending 

 to the base but not to the apex and with a reddish line or mark in the centre ; the antennae black, the 

 legs fusco-testaceous or piceous ; the under surface piceous, the epipleurse, the propleurae behind in the 

 male, and the abdomen in part obscure ferruginous, the presternum in front and the propleurae entirely 

 rufo-testaceous in the female ; above and beneath rather sparsely pubescent, the pubescence fuscous or 

 fusco-cinereous, paler on the head and under surface and on the lateral portions of the prothorax. Head 

 thickly, finely punctate, depressed in the middle between the eyes ; antennae about reaching the hind 

 angles of the prothorax in the female, longer in the male, joint 3 a little longer than 2. Prothorax much 

 longer than broad, very gradually narrowing from the middle forwards and slightly sinuate at the sides 

 behind ; the hind angles long and divergent, not or very obsoletely ( § ) carinate ; the surface closely and 

 finely punctate and also canaliculate. Scutellum rather convex, and with indications of a smooth raised 

 median line. Elytra wider than the prothorax, and about three times its length, gradually narrowing 

 from the middle, the apices truncate, the sutural angles finely mucronate ; deeply punctate-atriate, the 

 interstices convex and strongly transversely rugose, granulate on the basal declivity. Beneath sparsely, 

 finely punctate. 



Length 8|-9|, breadth 2l-2§ millim. ( tf $ .) 



Hab. Mexico, Oaxaca (Edge). 



Three examples. Allied to H. longicollis, but differing from it in the very rugose 

 elytral interstices, the relatively narrower thorax, the hind angles of which are not or 

 very obsoletely carinate, the finer pubescence, &c. The sexes differ in the colour of 

 the thorax. 



11. Hemicrepidius parvulus. (Tab. XXL fig. 12, $ .) 



Elongate, narrow, shining ; black, the prothorax with the hind angles ferruginous ( J ) — ferruginous, with a 

 broad, posteriorly narrowed, black median vitta ( $ ), the propleurae and the underside of the basal joint 

 of the antennae also ferruginous in the female ; the legs testaceous, the femora and tarsi sometimes 

 infuscate ; above and beneath sparsely and finely pubescent, the pubescence on the upper surface fusco- 

 cinereous, that on the lower surface cinereous. Head thickly punctured, flattened in front ; antennas 

 extending considerably beyond the hind angles of the prothorax in the male, shorter in the female, joints 

 2 and 3 short, equal in length. Prothorax a little longer than wide, slightly narrowed in front, the sides 

 feebly rounded in the female, subparallel in the male, and sinuate behind ; the hind angles greatly 

 produced, strongly divergent, and acute, not carinate; the surface rather sparsely, finely punctate. 

 Scutellum convex in front, thickly punctured, with indications of a smooth median line. Elytra about 

 two and three-fourths longer than the prothorax, and wider than it, narrowing from the basal third, the 

 apices subtruncate ; punctate-striate, the interstices rather convex and rugosely punctured. Beneath 

 sparsely punctate. 



Length 5-5 J, breadth 1|-1| millim. ( d 1 $ .) 



Hab. Guatemala, Purula in Vera Paz (Champion). 



