M3 
innumerable puddles and road-side gutters were near at hand, so 
that the insects may in all probability have bred in some of these. 
Stegomyia calo-pus, (Meigen) 
Stegomyia fasciata (Fab.) 
This mosquito is present all the year round ; there seems to be no 
marked seasonal prevalence. As already stated (ante, p. 17), the 
larvae occur everywhere, in any receptacle which will hold water for 
a few days. Great numbers, however, were found in large puddles 
in the open, in association with Anophelines and other mosquito 
larvae, although there were houses with suitable receptacles within 
50 feet of these habitats. They occurred also in two large deep 
collections of terrestrial water averaging 3 feet in depth, situate at 
the upper reaches of two Igarapes within the limits of the city (No. 9 
on map). On one occasion, swarms of larvae were found in a barrel 
of water containing the macerated and putrid remains of a number of 
frogs upon whose carcases they seemed to have been thriv ing. 
The females bite freely both by day as well as at night, though 
they are naturally much more noticeable in the day time, and they 
are most persistent in following man from place to place whether in 
sunlight or shadow. 
Being desirous of confirming the experiment conducted by 
Mr. Theobald* regarding the viability of the ova of this mosquito 
after long exposure to dry atmospheric conditions, two small consign¬ 
ments of eggs were forwarded to Liverpool in the year 1906. The 
first batch was laid on moist white filter paper; these were drie in 
the air and subsequently placed in a desiccator with chlori e o 
calcium for 24 hours, and finally transmitted to England in glass tu 
tightly corked. The following data gives the results of this experi¬ 
ment : 
September 9-11. 
October 26. 
>. 28. 
3 °- 
November 4. 
8 . 
Eggs laid at Manfios, Amazon. , f ..or 
, cached England. Placed in water a. a ten,pe 1 hoL 
12 larvae batched during the previous night and alte 
immersion. 
Larvae began moulting. 
All larvae completed first moult. 
SCtale, batched. This e^ P .e lived for 6 days. 
A male and female hatched. _ 
’ Mono. Culitid., Vol. Ill, p. b. 
