198 COLEOPTERA OF NORTH AMERICA. 



seated in Mexico, other species may be expected to occur in 

 Texas.* 



Third joiut of tarsi truncate ; hind tarsi with the fii'st joint elongated. 



Chrysobothris. 



Third joint of tarsi much prolonged at the side ; hind tarsi with the lirst 



and second joints equal ; scutellum small. Actenodes. 



Tribe II.— SCHIZOPIIVI. 



riiis tribe consists of two genera of stout convex form, occur- 

 ring in tlie Pacific district. It is easily distinguished by the 

 very wide metathoracic side pieces, and the deeply bilobed fourth 

 tarsal joint, which is cleft nearly to the base. The claws are 

 armed with an acute tooth. In Dystaxia no sexual characters 

 have been observed ; in Schizopus the 5th ventral segment of 

 the % is broadly, and the 6th deeply emarginate. 



Antennae slender, nearly filiform. Dystaxia. 



Autennse with joints 5-10 triangular. Schizopus. 



Tribe III.— THRIjVCOPYGII\I. 



This tribe contains but a single genus, Thrincopyge Lee, with 

 two species from New Mexico; the general form is elongate and 

 depressed. 



The front is not contracted by the insertion of the antennas; 

 the mandibles are short, thick, and obtuse; the mentum is en- 

 tirely corneous; the antennal pores are situated in small marginal 

 fovea;. The scutellum is distinct. The prosternum is broad, with 

 the sutures oblique; the sides are not angulated behind the coxa?, 

 and the tip is obtusely rounded, fitting into the emarginate meso- 

 sternum; the mesosternal suture is distinct. The hind coxaj are 

 just as in the preceding tribe, dilated inwards, with the anterior 

 margin straight, the posterior oblique; the epiniera of the meia- 

 thorax are triangular, not covered at all by the abdomen. The 

 last ventral segment has a deep groove running around the sides 

 and tip. The tarsi are broad; the ungues simple and distant. 



* Motschulsky (Bull. Mosc, 1859, II, 184) has described Belionota rali- 

 fornica. The other species of the genus known inhalnt the East Indies and 

 Madagascar. It is distinguished from Actenodes by the scutellum being 

 large, and the metasternum deeply emarginate. 



