Ixv, Ixxv] Crit) 
this way I got enough material diffusing the pleasant lemon- 
verbena scent of G. napi to make a small sachet. Unfortun- 
ately, however, the scent in this form does not seem to be 
lasting ; at any rate, I have not as yet been very successful in 
preventing its evanescence. It soon disappears, as might be 
expected, from butterflies being dried for the cabinet, though 
I have found it still strong in a specimen of G. napi, J, that 
had been eleven days in a cyanide bottle. 
“‘I have here specimens of some of the common Pierine 
odours preserved in both ways—G. brassicx, G. rape and G. 
napt in rectified spirit, G. rape and G. napi in starch powder, 
There are also, in similar bottles to the scents, samples of the 
spirit and starch used, in order to help in distinguishing any 
odour attaching to these substances from that due to the 
butterfly scales. I produce these specimens with some hesita- 
tion, because I am well aware that the perfumes are faint, and 
indeed are probably quite imperceptible to many people. That 
the bottles still retain sufficient odour to be easily discriminated 
by some persons, at any rate, I had proof this morning before 
bringing them here, and also this evening since entering the 
room.” 
Prof. R. Menpoua, F.R.S., mentioned that he had already 
detected the scent of Zanclognatha tarsipennalis. The Rev. F. 
D. Morice said the scent of some species of Hymenoptera 
was characteristic and well known. Mr. J. E. Connin said 
that some Diptera emitted a musky scent, and Col. BincHam 
instanced the case of certain Eastern Hupleine. Mr. J. W. 
Turt, Mr. M. Jacony, the Presipen’ and other Fellows joined 
in the discussion. 
October 19th, 1904. 
Professor E. B. Pounron, F.R.S., exhibited a number of 
specimens of the genus Sphecodes, five species in all, and 
of their mimetic Tachinid fly, Ocyptera brevicornis, Loew, 
illustrating his remarks on Mr. Edward Saunders’ paper 
on the Aculeate Hymenoptera from the Balearic Islands 
and Spain, published in the Transactions, 1904, pp. 644— 
649. 
