18 rs.] 43 



I had also good fortuiio in my breedings of Ap/iidce, the sohtary egg I had ob, 

 taiued from the apterous female oi Pemphigus spirothecce in January last, at IS^iee, 

 gave me on the 20th of April, the young louse forming the first phase of the new- 

 colony. I have followed the formation of the gall. 



The eggs, which I had found under the bark of the elm and which I suspected 

 to be those of Tetraneura ulmi, gave me also their produce as a little louse, which 

 proved to be the very insect I expected. I saw it form its galls, and I could follow 

 the first and second phases, as they are now taking wing. . . . But now here is 

 the difficulty, where do they go in summer ? 



I find now at the roots of grass {Broimis) a little louse which I suppose is Kirby's 

 Aphis radicum or Koch's Amt/cla fuscicornis, but the winged form (unknown to the 

 authors) is very curious, as it carries its wings, like Phylloxera, horizontally and 

 crossed on the back. The neuration of the wings is that of Aploneura, Passei'ini, of 

 which one species only (A. lentisci) is mentioned by the author. The new one ought 

 to receive the name of A. radicum, and the forms known to me are the third and 

 fourth phases, this last as winged Pseudogyne, carrying the sexuated pupse, and the 

 sexuated S and ? without rostrum. It is a curious fact that in the other Saploneura 

 only the gall-maker (the fundator) and the second phase (the emigrant) are known 

 and described (this last winged), but producing young ones with rostrum and not 

 sexuated. — J. LiCHTENSTEiN, La Lironde, near Montpellier : June, 1878. 



Stridulation in Insects and the Microphone — a suggestion.— A.a the microscope 

 reveals to the eye of man all the most insignificant of Nature's works, why may not 

 the microphone disclose to our hearing the most inaudible sound F Through Pro- 

 fessor Hughes' discovery we may hope to have great light thrown upon the somewhat 

 obscure subject of " Stridulation in Insects." As soon as the microphone is practically 

 developed, what can possibly hinder us from adding it to our long and able list of 

 entomological apparatus. We shall then be able to hear our Thecla rubi at work in 

 the wood-borders, and possibly a female Saturnia carpitii may be distinctly (nay 

 loudly) heard to call her loving mate from a distant spot, and this in a language of 

 her own.— S. D. Baiestow, Woodland Mount, Huddersfield : 3Iai/ 29tk, 1878. 



Luminous Insects, especially Diptera. — This subject having been alluded to in 

 the notice on " Luminous Lepidopterous larvae" (vide vol. xiv, p. 260, ante), I may 

 be allowed to complete the references there given. 



In the " Entomol. Monatsbliitter," by Dr. Ivraatz (1876, p. 41), there is a very 

 interesting observation on luminous Chironomi, by Brischke. They were observed 

 on a warm summer evening in 1860 : the light seemed to proceed from the thorax 

 and abdomen. Dr. Loew determined the species as Chir. tendens. In the same 

 article, the previous observations on the same phenomenon, by Pallas (his Culex was 

 a Chironomus), and by Alenitzin, Member of the Aralo-Caspian Expedition, are 

 referred to; an account of the latter, given in the "Deutsche Entom. Zeitschr. (1875, 

 p. 432), is quoted. 



Another case of ])liosphorescence among Diptera deserves to be investigated. 



The head of the mre and remarkable tly Thyreophora cynophila is said \.o be 



