578 Mr. T. Vernon Wollaston on the 



individuals as pertaining to the same sex, in which case 

 the outline of the rostrum may perhaps be only sexual. 

 But, be this as it may, I suspect that they are specifically 

 distinct from each other. 



99. EUTOKNUS (nov. gen.). The two insects which I 

 have described as members of the present genus are from 

 Ceylon and the Malayan archipelago, the one from the 

 former having been communicated by Mr. Janson (to 

 whom I have dedicated the species), whilst the other is 

 from the collection of Mr. Pascoe and was captured by 

 Mr. Wallace.* Indeed, judging from the many examples 

 now before me, the Malayan representative would appear 

 to be widely spread over those particular islands, and also 

 to be remarkably constant, or free from variation, the 

 types of it which I have examined having been obtained 

 in New Guinea, Morty, Tondano, Gilolo, and Makian. 



The characters of the genus are very similar to those 

 of Conarthrus, and yet I feel satisfied that the two groups 

 are essentially distinct, Eutornus receding from the latter 

 not only in the less parallel (or more fusiform) outline, 

 and more lightly sculptured surface, of the insects for which 

 it is established, and in the peculiarity of their colour, 

 which (instead of a uniform black) is rufo-ferruginous, 

 with the anterior and posterior portions more or less suf- 

 fused, or obscured; but likewise in their rostrum being 

 apparently always linear, in their prothorax being less 

 straightly truncated (or more subsinuated) at its base, in 

 their scutellum not being tilted (or sub-perpendicular), in 

 their elytra being (as in Heterarthrus] obscurely, and 

 minutely, rounded-off, separately, at the extreme apex, 

 and in the last joint of their feet being less conspicuously 

 conical. Their first and second abdominal segments, too, 

 are more convex, having scarcely any tendency to be 

 longitudinally hollowed-out, or concave. 



100. COPTUS (nov. gen.\ The two curious and closely- 

 allied little species on which the present genus is estab- 

 lished have been communicated by Mr. Pascoe, and were 

 taken by Mr. Wallace in the islands of New Guinea and 

 Sula, of the Malayan archipelago. Apart from their 

 rather small size, parallel outline, subdepressed surface, and 

 their rufo-piceous, or piceo-ferruginous hue, they may be 



The E. dubius, from New Zealand, is less typical, and may perhaps 

 be fonnd eventually to pertain to a new but cognate genus. 



