CHAPTER XXX 



OTHER INSECTS AFFECTING MAN AND DOMESTIC 

 ANIMALS 



Besides the mosquitoes, house-flies and fleas, there are 

 several other insects that affect man and his domestic animals 

 more or less seriously. The habits of some of these make it 

 quite possible for them to carry infection from one host to 

 another under favorable conditions. So aside from the annoy- 

 ance and suffering they may 

 cause they must always be re- 

 garded as potential sources of 

 greater danger. 



Flies. Among such trouble- 

 some and dangerous insects 



FIG. 172. A black-fly, 

 Simulium sp. (About 6 

 times natural size.) 



FIG. 173. Horse-fly, Tabanns 

 punctifer. (A little larger than 

 natural size.) 



various kinds of flies are perhaps most important. The little 

 "punkies, " or " no-see- urns," Ceratopogon spp., that often 

 occur in great swarms in certain regions, bite very severely and 

 are extremely annoying to man and beast. The black-flies, or 

 buffalo-gnats, Simulium spp., also fly in great swarms and 

 inflict very painful bites. The lancet-shaped stylets of the 



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