602 



THE ANIMAL PARASITES OF MAN 



and (2) the Tabanince ; the former have spurs on the hind tibict and usually ocelli ; 

 the latter have neither tibial spurs nor ocelli. 



[The PangoniTice contain two main genera, Fangonia and Chrysops. In the 

 former the proboscis is much elongated, and the third antennal segment is composed 

 of eight rings, and is never angulated or ungulated at the base. The proboscis 

 is often very long. 



[In Chrysops, the so-called blinding storm flies, all the three segments of the 

 antennas are long, the third having only five annulations, and the proboscis short 

 but very strong. 



[There are many genera in the Tabanince, which are found in all parts of the 

 world, of which two only are shown here viz., Tabanus and Haematopota. The 

 former has the first two segments of the antennae short, the third angulated 

 at the base, sometimes spurred and composed of five annulations ; the second 

 has the second segment short, and the third composed of four annulations 

 never angulated nor spurred at the base and the wings are adorned with grey or 

 brown markings. These latter are usually called "brimps" and "clegs" in Britain, 

 the former gad or horse flies, the seruts and mangrove flies of tropical countries. 



FIG. 416. The brimp (Hceinatopotaphivialis, Linn.). 



Family. Asilidae (Wolf Flies). 



[These flies are of little importance in regard to the subject dealt with in this 

 book ; but I have notes sent concerning the biting habits of one or more species 

 belonging to this family from the Malay States and Africa. 



[Asilidce, or wolf tfies, are easily told by the following characters : Large or 

 moderate-sized flies, thickly hairy ; head separated from thorax by a narrow neck ; 

 eyes separated in both sexes; proboscis firm and horny, adapted for piercing; 

 abdomen long, pointed, and composed of eight segments. Legs strong and bristly, 

 of moderate length. Wings sometimes mottled, lying parallel over the abdomen 

 when at rest. There are nearly 3,000 species. They live mostly upon insects, but 

 some are said to bite animals and man. They are, however, of little importance in 

 this respect. 



