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1072 
INSECTS AFFECTING DOMESTIC ANIMALS. 
Aside from fleas, in the case of dogs and cats, and a species of louse 
(Lipoptera=Mallophaga) of the carabao, our domestic animals are com- 
paratively free from parasitic insects. ‘True, the various species of 
horseflies (Tabanide) and Stomoxys calcitrans Linn., are rather abun- 
dant at certain seasons, but they are not as annoying to animals as 
similar species in the United States, and flies like the horn fly (Haema- . 
tobia serrata Desy.), the horse bot (Gastrophilus equi Fabr.), and the 
_ ox warble (//ypoderma lineata Villers) are, so far, unobserved here. 
MYIASIS AND HUMAN PARASITISM. 
During my work here one or two very severe cases of human myiasis 
have come under my observation. In one case the flies were identified as 
Lucilia dua Esch. 
The ordinary house insects, such as the bedbug (Cimea lectularius 
Linn.), the house fly (Musca domestica Linn.), (Musca spp.), the head 
louse (Pediculus capitis De Geer), the crab louse (Phthirius inguinalis 
Leach), and the flesh flies (Sarcophaga spp.) are all abundant, but the 
natives usually have their remedies for those which give them bodily 
discomfit, while they completely disregard flies of all kinds, even mosqui- 
toes, as a necessary and therefore bearable evil. 
MOSQUITOES. 
No one single problem in economic entomology, in so far as its relation 
to human well-being is concerned, develops such large features as that 
of the limiting of mosquitoes. 
Up to the present time there have been recorded from the Philippine 
Islands 83 species * belonging to this family. 
Work on yellow fever and malaria in the United States and on the 
latter disease in India, Italy, Africa, and elsewhere has shown, more or 
less accurately, the species of mosquitoes which play a réle in the trans- 
mission of these diseases. No work has as yet been done in the Philip- 
pines showing which of the 17 species belonging to Anopheline are the 
carriers of malaria. This field of research, which has been unexplored 
here because of pressure of other and routine work, will be entered into 
as soon as a way is seen whereby some of the ordinary routine can be 
given over to others, and it is not too much to suppose that some 
interesting developments will be had. 
Filaria have been already demonstrated in at least one species of 
mosquito in the Philippines, namely, Culex fatigans Wied., but as this 
work is to be published at no late date, nothing further in regard to it 
will be included here. 
* Banks: A list of Philippine Culicide, ete., Phil. Jowrn. Sci. (1906) 1, 977 
et seq. 
