XXXv1| @, CIES) 
describe it, a third compared it to primrose, the fourth com- 
pared it first to gorse, then to faint ‘ Syringa’ (meaning 
Philadelphus coronarius). Personally after more experience I 
hesitate between Freesia and ‘Syringa.’ Altogether up to 
March 31st, when it was getting over, I examined nineteen male 
G. cleopatra and found the scent quite distinct in all save one. 
“Though not as abundant in Algeria as G. cleopatra, our 
more familiar G. rhamni, L., is sufficiently common, and 
naturally I examined that species, or form, for scent. To 
my great surprise out of ten specimens examined not one had 
a scent at all like that of cleopatra, indeed in most of them I 
could detect no scent whatever! One day in the hotel garden 
at Hammam R’ihra, I caught within a space a few yards in 
extent, and within a quarter of an hour, five butterflies in the 
following order :—1 ¢ rhamni, 3 3 cleopatra, 1 3 rhamnt; 
all the three cleopatra had the scent, but neither of the rhamnt. 
“The one specimen of cleopatra in which no scent was 
detected was tested on a day when my nasal mucous membrane 
was somewhat inflamed, moreover a neighbouring pig-stye 
was distinctly a disturbing element. For these reasons I do 
not include in the above numbers 2 3 rhamni examined 
under the same conditions with negative results. 
“The living Gonepteryx can be easily held by the thumb 
below and the forefinger above the thorax, the wings being 
expanded, and so examined without appreciable injury to the 
specimen, in a way that the more delicate structure of most 
butterflies renders impossible. 
“These surprising results struck me so much at the time 
that I took care to assure myself that I was not deceived, but 
{ trust other entomologists will repeat the observations when 
opportunity offers. Such a difference in the scent of the two 
forms must imply a physiological difference that would point 
to a specific distinction. 
‘‘In North Devon on the 29th of last month I examined a 
3 G. rhamni but could detect no scent.” 
Dr. F. A. Drxey exhibited specimens of sorbet forms of 
Gonepteryx occurring in the Palearctic region, and commenting 
upon Dr. Longstafi’s observations, said :— 
“The facts relating to the scent of Gonepteryx cleopatra 
