- 
(tw?) 
Also sticks of Salix capraea containing larvae of Trochiliwm 
bembeciforme, one of these showing the cap formed over the hole 
prepared for emergence. This species is not usually supposed 
to form a cap. The larvae were not, as is generally thought, 
confined to living wood, some of those exhibited being in 
dead twigs. Also a living specimen of A, culiciformis, a 
species which the exhibitor remarked was easily forced. 
The Hon, N.C. Rorascuitp remarked on the special interest 
of the exhibit of 7. bembeciforme, observing that he was 
unaware of the formation of a cap by this species. 
TERATOLOGICAL SpecrmENs.—Mr. G. T. Brraune-BakErR 
showed a specimen of Hrebia ceto which had been swept from 
the herbage without its head, which was probably held fast 
by a spider; nine hours after capture this insect had still 
been capable of fluttering strongly. He also exhibited a 
specimen of Hrebia var. adyte, with a half-developed right 
hindwing; a specimen of EF. eriphyle with no left hindwing, 
and a Melitaea varia with no right hindwing; in the two 
latter there was no trace of the wing having ever been 
developed. 
Frea Eacs.—Mr. A, Bacot communicated the following 
note :-—At our meeting on the 16th Nov., 1910, the Hon. 
N. C. Roruscuixp pointed out the distinction between Cteno- 
cephalus canis and C. felis. I had a few days previously 
examined the ova of fleas taken from a dog’s, and also from a 
cat’s bed, and found that they differed in size and shape. 
Imagines have now been reared from these eggs, and I find 
I have both the species exhibited by the Hon. N. C. Roths- 
child. Measurements are as follows—(C. felis: length ‘5 mm, 
to 510 mm., width about ‘310 to ‘320 mm.; nearly but not 
quite circular in cross section. C. canis has a larger egg 
ranging from about 540 to ‘6 mm. in length, and from °365 
to 375 in width. The difference is sufficient to be easily 
appreciable to the naked eye, when the eggs are close together 
ona slide. The egg of C. fasciatus (one of the rat fleas) is 
smaller and more slender, a very regular oval as a rule, ‘560 
to ‘6 mm. in length, by °3 mm. in width. It has a more shiny 
surface than that of (’. canis which is dulled in comparison. 
The ova of Pulex writans are larger again and vary consider- 
