204 THE ENTOMOLOGIST. 



I have seen only a single example, a male (kindly commu- 

 nicated from the Brussels Museum by the kindness of M. G. 

 Severin), from which the apex of the abdomen (fig. 19) is 

 figured ; the corresponding parts of the other sex (fig. 20) are 

 copied from Schummel. It is the Cimex lacustris of several 

 early authors, but does not accord with the original description 

 of Linnaeus. 



(To be continued.) 



NOMENCLATURE OF LEPIDOPTERA. 



(Concluded from p. 185.) 



3. Are the Genera of Hubner's ' Tentamen ' to be 

 accepted or not ? &c. 



Sir George F. Hampson writes : — 



"That the genera of Hubner's 'Tentamen' be excluded for the 

 following reasons : — 



" That it has no possible claims to be considered a scientific work, 

 or more than a tentative list of names. 



" That its genera are entirely undefined, and therefore excluded by 

 the British Association rules. 



" That there is no evidence it has ever been published, and tbat if 

 published no even approximate date can be assigned to it. Tbe first 

 mention of tbe ' Tentamen ' known to me is by Ochsenheimer in the 

 preface to bis volume iv. (writing in 1816). He gives its full title, 

 and says tbat it was distributed by Hubner, and that be received it 

 long after the publication of his third volume in 1810. 



"We know from Geyer's account of Hubner in Thon's ' Entom. 

 Archiv,' 1, 2, p. 28, 1827, that Hubner's metbod was to print off a few 

 sheets of his various works and send them off to bis correspondents 

 whenever it suited him, and tbat his works were never regularly 

 published till Geyer issued them after Hubner's death, so that his 

 statement accords with what we know from other sources, and the 

 passage was thus interpreted by Hagenwbo assigns to the 'Tentamen' 

 the date ' before 1816, possibly before 1810,' quoting tbe passage in 

 Ochsenheimer. 



" In the preface to the ' Verzeichniss,' dated 1816, Hubner says 

 that he attempted a system of classification ten years before, and 

 immediately made it known. This may refer to tbe ' Tentamen,' but 

 cannot be clearly shown to do so, and in opposition to the theory that 

 the ' Tentamen ' was distributed in 1806 we have the fact that it 

 includes the Fabrician genus Glaucopis, published in 1807." 



Lord Walsingham writes : — 



" The genera of Hubner's ' Tentamen ' are all recognisable, as the 

 type is cited in each instance ; they are more satisfactory than any 

 genera in the Lepidoptera which had preceded them. They were 



