Genus Myzomyia. AD 
Myzomy1a Rossi. Giles. 
Anopheles Rossi. Giles. 
Anopheles vagus. Dénitz. 
(Mono. Culicid. I., p. 154, 1901 (Theobald) ; Beit. z. Kennt. d. Anop., p. 80 
(= vagus) (Dénitz.) . ) 
(Plates III. and VI.) 
Additional localities.—Mukerian, Hoshiarpur, India (Datta) ; 
Mozufferpur, Behar, Bengal (Green); Penang (Freer) ; Perak 
(Wright) ; Dacca (Macrae) ; Htawah, N.W.P.; Canara District, 
Goa Frontier (H. H. Aitken); Kuala Lumpur, Malay States 
(Durham) ; Sumatra, Padang (Dénitz). 
Time of capture.—October in rice-fields at Mukerian ; bred 
from larvae in February in Perak. 
Variation in cross-veins.—Captain James sends me the follow- 
ing note re the cross-veins: “The cross-veins in ossi are 
-now found to vary considerably. Four well-marked types may be 
noticed (i.) in which the mid cross-vein is nearly its own length 
away from the supernumerary ; this is the normal disposition ; 
(ii.) the supernumerary and mid join and form one line, the 
i Se ee a, aoa ar rates 
Bk es am, ae gad 
a. Re a 
ig abe : A poe PE 
‘aplliee sis 7 
Tp ib fh! 
Ma: A 
Hig, 23. 
Wing of Myzomyia Rosstt. Q. Giles. 
posterior more than twice its own length from the mid; also 
very abundant ; (iii.) the supernumerary and mid nearly join, and 
(iv.) the supernumerary and mid join, but form an angle.” I 
have been unable to note this myself in numbers of specimens 
examined, however. 
Captain Liston also writes regarding this subject as follows : 
‘‘T have examined many thousands of Anopheles in India, and 
especially many hundreds of Koss. In this latter species, I 
made a special study of the cross-veins and size of the fork-cells, 
and I found that these varied exactly as you have found in the 
sinensis group.” 
General Notes——The larva of this species, according to 
Mr. E. H. Aitken, when young is “brown, with a blackish head 
