from the Eastern Archipelago. 203 



aa. A pectoral canal passing behind the anterior coxa?. 



s. Pectoral canal gradually eflaced behind. 



t. Rostrum in repose extending to the abdomen TJiyestetha, Pasc. 



tt. Rostrum in repose not passing beyond the interme- 

 diate coxae Telaugia, n. g. 



ss. Pectoral canal limited behind. 



u. Intercoxal process very broad, the posterior coxse 

 close to the elytra. 



V. Metasternum of moderate length, intermediate and 

 posterior coxse on each side not approximate. 



w. Femora canaliculate beneath, receiving the tibite in 



repose Idotasia, n, g. 



WW. Femora not canaliculate beneath Semiathe, n. g. 



vv. Metasternum very short ; intermediate and posterior 

 coxse on each side nearly contiguous. 



./'. Pectoral canal not extending to intermediate coxso . Xychtisa, n. g. 



XX. Pectoral canal extending to the posterior border of 



the intermediate coxse Elichora, n. g. 



uu. Intercoxal process narrower; posterior coxse not 



near the elytra Nyphaibaj n. g. 



Mecopus. 



Schonherr, Disp. Meth. p. 304; Lacordaire, Gen. vii. p. 157. 



The new species of this genus described below are all very 

 distinct, and cannot possibly be confounded with any others. 

 This is not the case with M. bisjnnosus'^, Weber, on which 

 the genus is founded, and from which I cannot separate M. 

 Audineti^ Rid. Of the numerous examples in my collection, 

 from seventeen localities, extending from Java and Singapore 

 to New Guinea, I am unable satisfactorily to separate appa- 

 rently different forms which, if taken without the intermediate 

 individuals, would seem to represent good species. Here 

 " natural selection " may be said to have failed to strike out 

 connecting varieties, without which any such graduated series 

 of forms can be considered only to represent a single spe- 



but the foUovping species, not uncommon in Indian collections, brings it 

 into our table : — 



Sphadasmus hrahminus. 



S. breviter ovalis, fuscus, infra griseo-squamosus ; rostro prothorace bre- 

 vioi'e ; funiculi articulo primo secundo duplo longiore, tertio secundo 

 fere sequali ; prothorace transverso, subconico, regulariter convexo, 

 medio et utrinque griseo-squamoso ; elytris profunda striato-punctatis, 

 interstitiis latis, convexis, basi figura transversa triloba, plaga laterali 

 et maculis conjunctis in medio et pone medium sordide griseis notatis ; 

 pedibus squamis filiformibys vestitis. Long. 4j lin. 



Hub. Bengal. 



* RhynehcBnus hispinosus, Fab. (Syst. El. ii. 475), quoted in Schonherr, 

 is surely very different from this. Fabricius connects it with Cionus. 



