i88t;.] 63 



has been given above. In conclusion, I may mention the splendid collections of 

 British Lepidoptera, and of European Bhopalocera, made by the late Nicholas 

 Cooke : the British collection containing, in addition to his own, that of the late 

 Noah Greening, of Warrington, and a selection from that of the late Edwin 

 Birchall, of the Isle of Man. These collections were bequeathed by Mr. Cooke to 

 the citizens of Liverpool, and are deposited in the Liverpool Museum, where, though 

 far from being completely arranged, for their donor died while engaged in the 

 enormous task of re-arranging the entire collection, they may be seen by any one 

 interested on application to our courteous curator, Mr. Thomas J. Moore. 



3, Brougham Terrace, Liverpool : 

 July IQth, 1886. 



NOTES ON THE Q-ENERA CJEROSTEBNUS and IDOLIA {HISTERIBJE). 

 BY GEORGE LEWIS, F.L.S. 



In 1852, Leconte established the genus Ccerosternus in the Proc. 

 Acad. Phil., vi, p. 39, for the reception of two insects, G. americanus 

 and Icevissimus, but it is impossible to retain these two species in the 

 same genus, nor should they at any time have been placed together. 

 The antenna of C. americanus has a solid club, and in C. Icevissimus 

 the club is clearly 3-articulate, while the exoskeleton of the first is 

 essentially different from that of the second in form and sculpture. I 

 propose, therefore, to retain Leconte' s genus Cisrostenius for the first- 

 named species americanus, with this special emendation, that the club 

 of the antenna is solid. 



In 1885 I formed the genus IdoUa (Ann. Mag. Nat. Hist., p. 214) 

 to receive two insects, one, punctistei'num, from Blumenau, 8. Brazil, 

 the other, IcBvigata, from Honduras, and I find now that both of these 

 are congeneric with G. Icevissimus, Leconte, but what the specific 

 differences may be I cannot say. At present, it is well to consider 

 Leconte's " Icevissimus " as undescribed, for all he says regarding it 

 applies to four or five species of Idolia which are now before me. This 

 is Leconte's description : — " G. Icevissimus : upper surface very smooth 

 and shining, the epipleurae less suddenly inflexed than in G. americanus, 

 with only two very fine lateral strise ; the dorsal strise of the elytra 

 obsolete. The body is narrower and more elevated than in the pre- 

 ceding" {americanus). 



In 1811, Paykull published a description of Sister Icevigatus, 

 which Marseul, in his Monograph, 1855, considers to be the same 

 species as Leconte's Icevissimus, for until recently it was assumed 

 by authors that there was only one species of this curious form in 

 the fanjily, while now my opinion is that species allied to it are nu- 

 merous in Central America. 



