588 Mr. T. Yernon Wollaston on the 



Apart from these eccentricities of tibias and abdomen, 

 Xenocnema is remarkable for its rather short and thick, 

 but somewhat parallel and depressed, body, which is 

 densely and sharply sculptured, and of a piceo-ferruginous 

 hue ; for its rostrum (which is robust, but not particularly 

 abbreviated) being divided by a distinct line (above and 

 below) from the forehead ; for its antennas being almost 

 medial as regards their insertion ; for its eyes being pro- 

 minent ; for its prothorax being large, elongate, and sub- 

 quadrangular ; and for the very unusual sculpture of its 

 elytra, the interstices of which are costiform, each costa 

 however being as it were divided into two by a densely 

 punctulated central stria. 



115. STEREOCORYNES (nov. gen.\ It is the European 

 Rhyncolus truncorum, Germ., which has afforded the 

 details for the present genus ; and it is surprising to me 

 how that remarkably-constructed insect could ever have 

 been associated with the E. ater, and the various other 

 species on the true Rhyncolus-ij^Q. Thus, not only is it 

 more strictly cylindrical and obtusely rounded behind, but 

 its rostrum and antennas are on a totally different pattern, 

 the former being short and subparallel in the males, but 

 still shorter and subtriangular in the females ; whilst the 

 latter (which are inserted considerably behind the middle) 

 are, as compared with those of the Rhyncoli, exceedingly 

 abbreviated and glabrous, the scape particularly being 

 reduced in length, the funiculus-joints closely compacted 

 together, and the club solid, compressed, and ob-triangular 

 (being straightly truncated at its apex). In other respects 

 Stereocorynes is conspicuous for its eyes being extremely 

 sunken or depressed (instead of prominent as in Rhyn- 

 colus] ; for its prothorax being very convex, and quite 

 unconstricted in front; for its femora, particularly the 

 front pair, being considerably thickened, and with a faint 

 appearance beneath of an obtuse anguliform tooth; and 

 for its four anterior coxas being (as in Hexarthrum) so 

 manifestly more approximated as to be well nigh con- 

 tiguous. 



116. HEXARTHRUM (Wollaston, Ann. Nat. Hist. v. 448. 

 1860). The genus Hexarthrum was established by myself 

 thirteen years ago for the reception of a Rhyncolus-\^Q 

 insect, with a 6-jointed funiculus and subasperated elytra, 

 which had been captured in various houses, and outhouses, 



