DOUVSTHEXES. O 



St/nopsis of Genera. 



A. Mandibles long, curving- downwards ami 



backwards, narrowing towards apex. 



a. Antenua3 subinibricate ; lobes of third 



tarsal joint narrowed, usually spined at 

 apex. 

 a'. Marginal teetli of prothorax short ; 

 prosternuni witli strong anterior pro- 

 cess in J . 

 a'-. Only one distinct marginal tooth to 

 prothorax ; prosternal process of c? 



simple DORYSTHKNES. p. o. 



U-. Tliree distinct marginal teeth to pro- 

 thorax ; prosternal process of S 



bifid DissosTERNus p. 7. 



h' , Marginal teeth of prothorax long and 

 sharp ; prosternuni without anterior 

 process Baladeva, p 8 



b. Antennae serrate but not imbricate ; lobes 



of third tarsal joint rounded at apex. 

 «'. Pronotum strongly convex : marginal 



teeth rather short Lophosternus, p. 9. 



//. Pronotum feebly convex ; marginal 



teeth long and spiniform Paraphrus, p. 13. 



B. Mandibles vertical or oblique, not recurved, 

 a-. Mandibles of moderate length and never 



falciform; third tarsal joint incompletely 



bilobed or simply emarginate. 



a' . Marginal teeth of prothorax short ; 



tibife not cariuate ; autennre of S 



usually either imbricate, pectinate or 



tlabellate Prioxus, p. 14. 



V . Marginal teeth of prothorax lojig and 

 spiniform ; tibife cariuate and sulcate ; 

 antennae serrate or subserrate 

 «-, Epipleures of elytra gradually and 

 only slightly widened towards base. 

 a^. Antennal supports depressed : pro- 

 notum not tuberculate Prionomma, p. IG. 



b^. Antennal supports raised; pro- 

 notum bituberculate Axcyloprotus, p. 18. 



h-. Epipleures cf elytra strongly widenea 



out below shoulders Log-^eus, p. 19. 



b. Mandibles long, very long and falciform in 

 fully developed males; third tarsal joint 

 Completely bilobed Priotybannus, p. 21. 



Genus DORYSTHENES. 



Dorvsthenes, Vir/ors, Zool. Joiinr. ii, p. 514 (1820) ; Lacord. Geu. 



Culeopt. viii, p. 53 (18(39). 

 Cvrtognathus, Casteln. Hid. Xaf. An. Art. ii, p. 389 (1840). 



Type, D. rostrataa, Fab. 

 Ramie. India, Burma and Siam. 



(5 . Mandibles long, curved backwards below, gradually narrowed 

 and only slightly incurved towards t!ie tip. Antenuiferous tubers 



