Genera of the Cossonidce. 583 



veloped prothorax and elongate feet, as also in the fact 

 of its first and second abdominal segments being divided 

 from each other by a conspicuous line, that I think it will 

 be more natural to place it in.the present position than else- 

 where. Its coxae are all of them very widely separated, 

 though each successive pair is more remote than the one 

 which precedes it ; its eyes are exceedingly large and 

 prominent; and its prothorax is slightly concave on the 

 underside. The single species on which the genus is 

 established is from the Malayan archipelago, it having 

 been captured by Mr. Wallace in the island of Batchian, 

 as well as at Dorey in New Guinea. 



109. PACHYSTYLUS (nov. genJ). Two examples of the 

 remarkable species for which the present genus is estab- 

 lished have been communicated by Mr. Fry as having been 

 received from Chili ; and their position in a natural system 

 of arrangement is not altogether very apparent, though, 

 on the whole, I believe that it will be best to place them at 

 no great distance from Rliyncolus. Nevertheless I must 

 admit that in the minuteness of their scutellum they stand 

 perfectly alone amongst those immediate groups, and make 

 a far nearer approach to Phlceophagus and Caulotrupis. 

 Still, the scutellum is not quite obsolete; and the other 

 details of their structure (particularly as regards their in- 

 crassated limbs, and their short first tarsal and second 

 funiculus joints) are so much more in accordance with the 

 corresponding ones of the Rhyncoli that I cannot persuade 

 myself to remove the genus into the Phlceophagus neigh- 

 bourhood ; though, at the same time, I am far from think- 

 ing that the situation which I have selected for it is quite 

 satisfactory. Be the position, however, of Pacliy stylus 

 what it may, it is, as a genus, very distinct from every- 

 thing else with which lam acquainted, the smallness of its 

 scutellum and its extremely prominent eyes (which in the 

 male sex are abruptly terminated posteriorly, but gradually 

 sloped-off in front), in conjunction with its somewhat 

 lengthened rostrum (as compared with that of the Rhyn- 

 coli), which is very much broader in the males than in 

 the females, and its elongate, thickened scape (which, on 

 account of its robustness throughout, is but little clavated 

 towards the apex), giving it a character which is essen- 

 tially its own. Although not wider than the elytra, its 

 prothorax (which is almost free from an anterior constric- 

 tion) is very largely developed, and elongate ; and there 



