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ig times, or in 11 per cent, of the lots. W hen it is remembered that not 
all of the numerous samples which we brought to the laboratory ever 
developed into the complete mosquito, I think I am safe in concluding that 
the Stegomyia was present at least in 50 per cent, of the lots in the town. 
In the very numerous series of receptacles which were examined, in no instance 
were the larvae of the Anopheles found. 
3. — Examination of the Gutters and Pools. 
Having ascertained that the clear-water receptacles in the town of Belize 
contained the Stegomyia fasciata in very large numbers, I next examined the 
shallow weed-grown gutters and the deeper canals along the streets, together 
with the pools in the waste places and the swamps. (See plates VII. and VIII.) 
As will be shown in a later portion of this report, the gutters contained 
with few exceptions clear or only muddy water, not to any large extent the 
sewage commonly -net with in other towns. I hey contain, on the other 
hand, abundant aquatic weeds, and support immense numbers of tadpoles and 
minute fish. The canals by the side of the roadways are lined with “sour 
grass ” and other weeds, and extend into the mangrove swamps ; they, in fact, 
constitute prolongations of the swamp into the town. There is a sluggish 
circulation in them which is increased at the time of high tides. I hey receive 
a very large proportion of the night soil, but as they are fortunately so well 
stocked with the scavenger cat-fish, other specimens of fish, tadpoles and crabs, 
everything in the nature of animal offal is usually readily consumed. 
In none of these places were either my colleague or myself able to find 
the larvae of Stegomyia, whilst larva; of Culicidae were rare. The larva; which 
usually were to be found to the exclusion of all others were those of the 
Anopheles. These larvae were, however, more abundant in the clear, com- 
paratively shallow, weed-grown pools or gutters than along the sides of the 
canals and the fringe of the mangrove swamps. 
4. — Examination of the Crab- Holes. 
A feature of the low lying parts of the Colony are the innumerable crabs 
which everywhere are to be found burrowing in the sandy soil of the streets, 
yards and gardens, and beneath the houses. The holes are comparatively 
shallow, but, nevertheless, are deep enough to reach the water level. These 
holes harbour the crab-hole mosquito or Deinocerites cancer in large numbers, 
occasionally other species are present, but I did not find Stegomyia nor 
Anopheles. After heavy rains they become troublesome, as the water fills 
their holes and they take shelter in the houses. Apart from the discomfort 
which they may give rise to, they are harmless. 
5. — Summary of the Mosquito Distribution in Belize. 
The mosquitoes found in the town of Belize may from the habitats of the 
larvte be divided into three groups. 
1. Anophelina. — Ccllia albipes and another undetermined species breeding in 
large numbers in and around the town. Especially abundant at the north end in 
the marsh land around the Barracks, in private residences and at Quarantine 
Station. Along the fringe of the mangrove swamp surrounding the town to the back 
