150 Dr. G. A. K.Marshall on 



Faust lias tlesoribed a fow insects under this name from 

 Madagascar. Of these I have seen E. rustiraniis, E. longi- 

 cornis, E. cristicolUs, and E. humi/is, all of which differ from 

 the Coutiiieiital forms in the following particulars : the 

 mentum hears two setje on the disk ; the metopisternal 

 suture is complete ; and the epi<;tome is developed into a 

 large even plate occupying the whole apex of the rostrum, 

 not delimitated laterally, reaching the front margin of the 

 scrobes and ])roduced between them into an angular pro- 

 jection, which is separated from the rest of the rostrum 

 by an incision. On the other hand, in true Eremnns the 

 mentum is devoid of setae on the disk : the metepisternal 

 suture is incomplete ; and the epistome is small, of normal 

 form, and distant from the scrobes. For the Madagascar 

 species the name Neseremnus, gen. nov., is proposed, with 

 IJ. rusticanus, Fst., as the genotype. 



The genotype of Eremnus has not hitherto been fixed, for 

 Schonherr divided the genus into two sections and cited 

 E. exaratm. Boh., as the type of the first and E. setulosus. 

 Boh., as that of the second. E. exaratus is therefore now 

 definitely selected as the genotype. 



Subfamily Rjiytirbhinin^. 

 Gronops postdentatus, sp. n. 



(J ? . Integument black, covered with dense rough earth- 

 brown scaling, the head, pronotum, and the posterior half 

 of the dorsum of the elytra sometimes black. 



Head with a very high broad ridge above each eye, being 

 a continuation of the rostral ridge, and ending abruptly and 

 perpendicularly at the posterior margin of the eye ; the 

 vertex flattened and the forehead between the ridges 

 deeply depressed below the level of the rostrum ; the whole 

 covered with overlapping concave scales, and with a few 

 short, thick, dark, recumbent setge on the ridges. Rosirwn 

 with the dorsal outline evenly curved ; the dorsal area 

 elevated, paralled-sided, and with its lateral margins slightly 

 and obtusely raised, the sides of the rostrum sloping and not 

 vertical ; the clothing as on the head. Prothorax a little 

 longer than broad, almost parallel-sided from the base to 

 beyond the middle, and then obtusely angulated ; the apex 

 rather narrower than the base, wliich is rounded ; the 

 dorsum with three broad, deep, longitudinal furrov, s, 

 separated by two strong costae which are very broad in their 

 posterior two-thirds and much narrower in front, each 



