3296 Society of British Entomologists. 



collected, thus resembling Nicellii, and the hinder marginal line is much more distinct 

 and darker than in Frolichiella, where it is barely perceptible. 



" From Nicellii, fine specimens of Dunningiella may be readily distinguished by 

 their dark colour ; worn specimens are less easily separated, but the longer and nar- 

 rower anterior wings, less brilliant markings, and the clouded appearance of the ground 

 colour, are sufficient characters to enable one eventually to separate them. 



" Dunningiella was the species T described in the ' Zoologist' (2088), under the 

 name of Frolichiella, and is in most collections under that name. It probably is at- 

 tached to hazel or oak. 



" Of the true Frolichiella I have a specimen taken * among alders on Ockham 

 Bog, near York, May 31, 1849,' (Zool. 2897)." 



Mr. Stainton read a translation from the Silesian ' Bericht uber die Arbeiten der 

 Entomologischen Sektion' for 1850, of Professor Siebold's "Kemarks on the Psychidse." 

 In this paper, Siebold alludes to a former suspicion of his that " alternation of genera- 

 tion " did not occur among the Aphides only ; and affirms that he is now certain the 

 same phenomenon occurs among the Psychidae, he having discovered it in the Talepo- 

 riae. He had particularly investigated the history of T. Lichenella, Zell., and found 

 that for several generations fertile eggs were produced by the females (or nurses as un- 

 der these circumstances they are called), without male intercourse. 



It had also been observed that from some spiral cases found in Germany and Italy, 

 apparently belonging to a Psyche, nothing but vermiform females were produced, 

 which again laid fertile eggs without male intercourse ; and indeed the male of this 

 species was not hitherto known. 



Mr. J. E. Gray expressed his dissent from the theory of " alternation of genera- 

 tion,'' and cautioned young entomologists against believing in such a doctrine because 

 it was advocated by a physiologist of so great a reputation as Siebold. 



The President observed that M. Guerin had known an example of a female Bom- 

 byx Mori having produced fertile eggs without male intercourse ; and it was recorded 

 that a similar circumstance had occurred among the Sphingidae. — /. W. D. 



Proceedings of the Society of British Entomologists. 



October 7, 1851. — Mr. Harding, President, in the chair. 



The only novelties exhibited as having been taken during the past month were 

 Hadena lutulenta and Aplecta occulta, taken by sugar at Darenth ; Hadena jEthiops 

 from the Fens, exhibited by Mr Harding ; Aglossa cuprealis, taken on a house-top in 

 the City. 



It was remarked in the course of a conversation, that out of a hundred specimens 

 of Colias Edusa taken during the present season, not more than nine were females, or 

 in the proportion of ten males to one of the other sex. The remarkable number of 

 Vanessa Cardui was noticed by several members, as well as the variety of places in 

 which they were seen. Two specimens were observed flying in the enclosure in Lin- 

 coln's Inn Fields, and great numbers in the fields near Highgate ; and at the latter 

 place the larva) were most abundant. — /. T. Norman. 



