Coleoptera of Japan. 69 



EUGNAMPTUS. 



This genus has been distinguished from Rhynchites 

 hitherto by no very good character, the best being the 

 greater elongation of the basal joint of the posterior 

 tarsi ; this is however variable in both of the genera, 

 and cannot be relied on to define the two genera 

 satisfactorily. Eugnamptus is, however, a valid genus, 

 and can be distinguished by other more important 

 characters. The centro-sternal piece of the prosternum 

 is very peculiar in form ; it is triangular, with the sides 

 a little curvate, and is acuminate behind ; it is inter- 

 posed between the epimera, with which it is soldered by 

 a very oblique suture on each side ; the epimera do not 

 meet behind it, though they project farther back than it, 

 and the space separating their apices is of variable 

 width according to the species, being very broad in 

 E. aurifrons, quite narrow in E. flavipes. 



In Eugnamptus the first ventral suture is nearly or 

 quite obliterated, and the pygidium is quite covered by 

 the wing-cases, except that it may be distinguished 

 between their rounded and somewhat divergent apices ; 

 the eyes are large, the club of the antennae elongate, 

 slender, and laxly articulated, and the basal joint of the 

 tarsi is elongate. 



The genus will probably prove numerous in species in 

 the tropics of both hemispheres, but I do not think the 

 Eastern species will ultimately be associated in the same 

 genus with those of the New World. 



Eugnamptus fragilis, n. s. 



Subdepressus, leete cyaneus, nitidus, parce longius setosus, an- 

 tennis rostro pedibusque nigris ; elytris seriatim punctatis, inter- 

 stitiis fere laevigatis, primo ad basin punctis adjectis circiter sex. 

 Long, cum rostro, 5 — 5| mm. 



Antennae very slender, club extremely elongate and loosely 

 articulated. Rostrum broad, expanded towards the tip, and nearly 

 as long as the thorax in the female ; in the male more slender, only 

 about as long as the head ; eyes very large, larger in the male than 

 in the female. Thorax slender, conico-cylindrical, shining, rather 

 sparingly and not coarsely punctate. Elytra elongate, with regular 

 sei'ies of punctures, and shining, flat, not punctate interstices. 

 Legs hairy ; basal joint of hind tarsus scarcely so long as the three 

 following together. 



