BY E. W. FKRGUSON, 429 



species; in the most typical examples of the fjenus, the prothorax 

 is strongly and evenly rounded on the sides, whereas in others 

 it is strongly dentate, this form reaching its highest develop- 

 ment in (J. spinicoUis, which has been regarded by some author- 

 ities as being generically distinct. With this, I do not agree, 

 as the transition between the various species of Cubicoirhi/iichus 

 is too gradual to admit of a violent separation of this species; 

 moreover, in the females of the species with rounder prothorax, 

 the sides are distinctly ridged as in the dentate species. The 

 pz'esence of a subapical and a basal, transverse impression is 

 constant, while the median line is, as a rule, impressed. The 

 elytra are, as a rule, subovate, with the humeral angles strongly 

 rounded, and strongly declivous posteriorly. The disc is regu- 

 larly striate, the punctures open, and rather indefinite, never 

 very large; the interstices are, as a rule, granulate, though the 

 granules may be obsolescent on the disc; they are situate rather 

 to one side of the interstice, in some cases simulating intrastrial 

 granules. Some of the species, in addition, present extraordinary 

 features, in the development of spines or tubercles. The under- 

 surface is, in the male, gently concave over the metasternum 

 and basal, ventral segments, whereas, in the female, the under- 

 surface is convex. The front coxse are, in a few species, sepa- 

 rated; in the others, they are contiguous. The legs, and in 

 particular the posterior tibiae, show exti*aordinary features of 

 specific importance. These are present in the male only, and it 

 is impossible, in many cases, to distinguish the females from 

 each other, although the males may be readily identified. 



Of the Amycterides described previouslv to the institution of 

 the genus, only three can be referred to it. 



C. Bohemani Bohem., (Schonh., Gen. Cure, vii. (1), 1843) is a 

 well known Western Australian species; while C. crenicollis 

 Waterh., (Trans. Ent. Soc, 1854), and C. Dohrni Waterh., {I.e.) 

 are also Western Australian species, and readily identified from 

 their descriptions. 



The name C. niorosus has been in use for a species of Cuhi- 

 corrhynchus, but incorrectly so. I have seen the type of Ainyc- 

 terus THorosus, and it is a Sclerorinus; although the species which 



