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(in some species) be free from striations. In other 
species the appearance is rather that of a white striated 
rim. In all species of Anopheline ova pet described, a 
striated frill or rim is present. The width and extent 
of the frill vary in different species. 
Type i.—Ova have the upper surface very narrow, 
with the lateral floats not touching the margin (Fig. 
62 : 1). 
The species with ova of this type are— 
M. barbirostris M. culicifacies 
M. nigerrimus M. listoni 
A. bifurcatus 
Type 2.—Ova having a more or less broad upper 
surface, with the lateral floats touching the margin 
(Fig. 62 : 2, 3, 4, and 6). 
Species having ova of this type are— 
M. rossi N. fuliginosus 
Ce. pulcherrima N. stephensi 
A. maculipennis A. algeriensis 
Type 3.—Ova with no floats, and with upper 
surface rudimentary (Fig. 62 : 5). 
M. turkhudi 
M. azriki 
Species having ova of the first type have in all 
cases been species breeding in either open natural 
waters or running streams. 
Species with ova of the second type are in general 
found breeding in pools. 
The only ova as yet systematically described are 
those of the Indian Anophelines. Further observations 
will probably add further types to the above. 
