36 



very readily recognisable by its author's description, — reasons 

 that seem to be on the whole conclusive, — and therefore 

 C. Adelaidce must be quoted, I think, as a synonym of obliquata. 



CYLCOTHORAX. 



C. peryphoides, Blackb. Mr. Sloane in a recent valuable paper 

 (P.L.S., N.S.W., 1899, p. 563) discusses the relation of this 

 insect to his new species C. cordicollis, and mentions my having 

 stated that the latter is distinct from it, proceeding to conjecture 

 the distinctive characters. I fear, from this, that I must have 

 answered his enquiries hurriedly and without giving my reasons 

 for considering the two distinct, — for which if it was so I 

 certainly owe him my apologies, — though it is possible he may 

 have mislaid remarks I may have written on the subject and only 

 remembered that I reported the two species as both valid. In 

 point of fact they are closely allied but (apart from the great 

 difference in the colour of the legs, — a character worthy of note 

 when accompanied by structural divergence) the form of the pro- 

 thorax furnishes a perfectly satisfactory distinction. In cordicollis 

 the lateral margins of that segment (the short sub-basal parallel- 

 sided part being disregarded) diverge for considerably more than 

 half their length so that the greatest width of the segment is in 

 front of the middle even of the part with curved sides, whereas 

 in peryphoides the corresponding part of the lateral margin is an 

 even curve, the greatest width of the prothorax being exactly at 

 the middle of the curve, with the result of a very different facies, 



the prothorax looking distinctly more transverse in peryphoides 



than in cordicollis, although careful measurement shows it to be 

 only very slightly so. The lateral outline of the prothorax of 

 peryphoides, if the short parallel sided basal piece be disregarded, 

 is exactly like the lateral outline of that segment in C. ambiguus, 

 Er. In peryphoides, moreover, the form of the whole insect is 

 wider and less convex, — more robust-looking. 



LAMELLICORNES. 



CEPHALODESMIUS. 



C. minor, sp. no v. Niger, an tennis palpisque pallidis; sat 

 opacus ; clypeo brevius 4-dentato, dentibus medianis quam 

 ceteri paullo longioribus ; prothorace transverso, sat crebre 

 minus fortiter punctulato, leviter canaliculato (canali antice 

 obsoleto), ad latera ampliato-depresso, parte ampliata ad 

 medium tuberculo parvo instructa, lateribus paullo ante 

 medium et sat longe pone medium perspicue angulatis (inter 

 an<mlos fere rectis sed retrorsum leviter convergentibus), 

 angulis anticis sat acutis posticis fere rectis ; elytris sub- 

 sulcatis (ut C. armigeri, Westw., sculpturatis), setis brevibus 

 crassis ferrugineis sparsim vestitis. 



