CALLICHEOMIKI. 



189 



prothorax in both sexes, and in the elytra of the males, which are 

 without spots posteriorly. The males appear to be much less 

 numerous in collections than the females, and those described 

 above are considered to belong to the species because they have 

 coine from the same localities as some in the same collections. 



Group CALLICHROMINI. 



Head more or less distinctly raised between the antenna? ; 

 the clypeus rather large, prolonged anteriorly some distance 

 beyond the base of the mandibles ; eyes finely facetted, deeply 

 emarginate, the lower lobes generally large, extending to the front; 

 outer lobe of maxilla? long, with brush of hairs at the end ; 

 maxillary palpi usually longer than the labial. Prothorax gener- 

 ally tuberculate at the sides. Scutellum usually rather large, 

 triangular in form, the sides straight or slightly curved, the apex 

 acute. Front coxa? globular, not prominent ; their acetabula 

 rounded on the outer side, closed, or very nearly closed, poste- 

 riorly. Acetabula of middle coxae extended to the epimera. Legs 

 long or moderately long ; their tibia? compressed. Metasternum 

 provided with scent-pores. "Wings with vein Cu 1 simple, Cu 2 

 absent. Male with six, visible ventral segments to the abdomen. 



This group is well represented in the African and Oriental 

 Eegions, less well in Tropical America and by a few species only 

 in the Holarctic and Australian Eegions. The species as a rule 

 are characterized by a metallic coloration, varied in some cases by 

 yellow or fulvous bands or spots on the elytra. 



Synopsis of the Genera. 



A. Last four or five joints of antennae narrower 

 as a rule than those preceding them, some- 

 times slightly thicker ; hind femora gra- 

 dually thickened. 



a. Antennae robust, as a rule not longer than 



body in c? , usually in part yellow or 

 fulvous. 



a'. Head not narrowed and elongated 

 below ; antenna? much shorter than 

 body in J . 



a 2 . Prothorax either unarmed or feebly 

 tuberculate at sides; hind femora 



much shorter than abdomen ZONOPTERUS, p. 190. 



b-. Prothorax strongly tuberculate at 

 sides ; hind femora almost as long as 



abdomen NIKJEUS, p. 193. 



V. Head narrowed and elongated below ; 

 antenna? subequal in length to body 

 in 3 PACHYTEUIA, p. 194. 



b. Antenna? less robust, generally rather slen- 



der, longer as a rule than body in <f, 

 usually black or metallic. 



