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In the shallow weed-grown gutters along the sides of many of the streets of 
Belize. In the marsh land at Yarborough, and in shallow pools generally in 
waste places. In cattle ponds. Absent from the water receptacles of the houses. 
2. Culicina and Aedeomyina.— Species breeding in dirty water, in odd 
receptacles, and barrels in the yards and in some of the gutters. The Deinocerite s 
cancer, as just mentioned, in the innumerable crab-holes which infest the grounds 
beneath and around the houses 
3. Culicina. — The Stegomyia fasciata , or Yeilow Fever Mosquito, appears 
to be the most abundant species of mosquito in Belize. As in other towns 
where it has been studied it is found to be essentially a house mosquito, 
breeding in the cisterns in the yards and living in the houses. It prefers the 
still, clean water, and therefore seeks out the cisterns, where it flourishes to the 
exclusion of other species. 
In the accompanying Plan II. I have indicated the Stegomyia and Anopheles 
distribution in Belize. The dots indicate the blocks where the Stegomyia 
fasciata has been found either by myself or my colleagues. It will be seen that 
they are distributed throughout the inhabited blocks ; they are very abundant 
on the swamp side (West) of the canal, which is the poor district, and contains 
the very large number of barrels. No area of the town examined by us has been 
found free. The foci appear on the plan to be less numerous in the North 
portion of the town, but this is entirely owing to the fact that not so many 
blocks in this district were examined by us as in the South part. Immediately 
in and around Government House we have not found the Stegomyia , due to 
the careful screening of all the cisterns on the grounds ; but it is present, however, 
in the yards of some of the adjacent houses. The dots on Plan 2 indicate the 
Anopheles distribution. Unlike New Orleans where the Anopheles is confined 
to the swampy outskirts, in Belize the Anopheles penetrates into the town 
along the side drains ; it is, however, more especially abundant at the North 
and South extremities of the town. 
Owing to the very selective distribution of the Stegomyia and the Anopheles, 
the measures which must be taken in order to free the town of these pests is 
at once made clear, and the problem becomes a very practicable one to deal with. 
6. Relationship of the Stegomyia Distribution in Belize to the 
Cases of Yellow Fever. 
In the spot plan accompanying Chapter I. the cases of Yellow fever are 
scattered here and there both in the North and South portions of the town. 
There is no special feature in their distribution beyond the fact that we know 
the Stegomyia was uniformly distributed throughout the town. I here was 
therefore nothing to hinder the spread of the disease. 
1 Dr. Heusner regards this latter species as the chief malarial carrier in Belize. 
Note. — Upon some of the Culicida: identified in Belize by Dr. Heusner the following 
species have been recorded : — 
Culex albitarsis, restuans, serratus, taeniorhynchus, atratus, senatus, alboannulatus 
scholasticus, Jamaicensis, marinus, fatigans, pipiens, and confinnis ; Stegomyia fasciata, 
scutellaris and notoscripta ; Deinocerites cancer in the crab-holes 
Panoplites titillans. 
Anopheles niggerimus and sinensis (very doubtful), Cellia albipes. 
The natural enemies are the minnows, tadpoles and the dragon fly : the sun has also a 
powerful effect on small quantities of water directly exposed to its rays. 
