21 
Eggs of Culicidae. 
ally at one end and more or less bluntly truncated at the other, 
the broad end terminating in a minute tine point in one species 
sent me by Dr. Daniels (Fig. 14, b). 
Stegromyia ova. —The only ova of Stegomyia that have 
been observed are those of S. fasciata and S. notoscripta. The 
former are laid singly, according to Dr. Daniels and Major Ronald 
Ross, on the water. In form they are ovoid, rather more pointed 
at one end than the other, and are surrounded by a series of 
little air-chambers (Fig. 14, d). Skuse describes those of 
S. notoscripta as being laid in boat-shaped masses. 
PanopliteS ova. —The only observation I have on the eggs 
of this genus is sent by Dr. Daniels, who kindly allowed me to 
reproduce a photo of the ova of the “ Filaria-bearing ” Panoplites 
of Central Africa. The eggs, unlike Culex, are laid singly and 
t 
are of different form, being sharply contracted at one end, which 
becomes narrowly pointed (Fig. 14, a). They drift together very 
much in the same way as the ova of Anopheles . We thus get a 
different method of oviposition in these previously called Gal ex , 
which adds another reason besides scale structure for separating 
them as a distinct genus. 
Anopheles ova.—With regard to the ova of Anopheles we 
knew but little until Professors Howard and Grassi worked out 
the life-history of A. maculipennis. Just recently Nuttall and 
Shipley * have issued a valuable paper on Anopheles maculipennis , 
in which the egg and larva are well figured and described. There 
is little doubt, I fancy, but that the ova are always deposited 
as others of the Culicidae on water. Meinert says nothing 
of them. Major Ross, I believe, states that in dndia he 
found the female Anopheles depositing their eggs not in 
water but on hard surfaces, but this, I think, was under 
unnatural conditions. Dr. St. George Gray, writing from 
Castries, St. Lucia, says that, “ On Monday, 27th of November, 
I found in the same pool neither larvae nor pupae, but only 
pupal skins. During this time there had been no rain. A few 
days later there were some heavy showers, and on Monday the 
4th of December I found in the same pool many larvae which 
had not yet changed. This appears to indicate that the eggs of 
Anopheles are not laid on the surface of the water, but near it, 
and are washed into the water by the rain.” This seems to bear 
* Journal of Hygiene, vol. i. no. 1, p. 45, &e. 
