ath. 
ie OD etek ae Ne ve eel aN Bie 2) ee a, 4 oe >. all 
aN Sopa SE alle VRS ai ko ec aly Ser 
a 4, > . 
' : = x 
ahs 
5 Heetan ee 
Reece ho pO 
“ . = 
Ixxili 
than the Anthidium. Further, the fact that the Anthadium 
took no further interest in the vanquished Bombus does not 
suggest that its action was due to sexual instinct. The con- 
clusion arrived at is that the Anthidiwm wished to preserve 
this particular, patch of flowers for the benefit of itself and its 
congeners, and resented the intrusion of outsiders. 
Brivish SPECIES or ZyGAENA.—Mr. T. H. L. GrosvENoR 
exhibited the following :— 
(1) A small race of Zygaena trifolii from Sussex, compared 
with a large race from Kent; it was found that these two races 
were unable to pair although readily attracted to one another. 
(2) A black form from Sussex; it was found that these 
would only pair inter se with the greatest reluctance, and when 
finally obtained the resulting ova were infertile; it was also 
noted that a normal male preferred a black female and would 
not pair with a normal individual if a black one was present. 
Microscopic examination of the scaling showed this form to 
be normal. 
(3) With a white female it was found impossible to obtain 
a pairing, as it did not seem to exhibit any sexual attraction, 
and males that readily paired with normal individuals showed 
not the slightest attraction. The scaling was found to be very 
sparse, and such scales as were present were curled. 
(4) A male with spot 4 missing from the left primary. 
(5) Teratological examples, including a male with wings 
small and almost circular, and a black male with wings fully 
developed but those on the left smaller than on the right. 
(6) Two males with a number of white scales mixed with 
the red of the maculae; these were found to be different 
to exhibit No. 3, as these white scales were quite normal. 
(7) A male Z. tutti and a female of Z. trifoliv taken in coitt. 
Six imagines, the result of this pairing, were shown, altogether 
19 were bred with the following results :— 
All the females resembled the female parent. 
50 °% of the males resembled the female parent. 
50 % of the males had a well-defined but small sixth spot. 
A pairing between these was found to be infertile. 
(8) Two males found in cop., one Z. tutti and one Z. trifolia ; 
they remained together at least 12 hours; the genitalia, 
