162 ENTOMOLOGY FOR MEDICAL OFFICERS 



on the lower border of the arista are more numerous, and the 

 3rd longitudinal vein is bare. 



Philcematomyia, Austen {(piXdifiaTO's = bloodthirsty ; fj.vta 

 = fly). From India, Ceylon, Tropical Africa, and Cyprus. 

 Resembles the common house-fly in general appearance, 

 having the arista feathered on both borders, the 4th longi- 

 tudinal vein bent at an angle (c/>. Fig. 5), and the proboscis 

 coarse and retractile. The maxillary palps, however, are 

 spatulate and are not much shorter than the proboscis. 

 Austen has described and figured the curious proboscis, 

 which, however, here (Fig. 62) is shown as seen by transmitted 



Tig. 62. — liuul'u-parls of Philwmatomyia. 



light after maceration in caustic potash. It consists of a 

 boat-shaped chitinous basal part and a shorter terminal soft 

 portion (with large labella and numerous pseudotracheae) 

 which, in repose, is bent back beneath the chitinous shaft. 

 Besides the powerful epipharynx and the hypopharynx there 

 is a pair of stout chitinous rods, to which is hinged a massive 

 chitinous terminal-piece crowned with large teeth. In action 

 the fleshy portion of the proboscis is erected and extended, 

 carrying the toothed terminal-piece with it. 



Pristirhynchomyia, Brunetti, from Calcutta, seems to be 

 identical with the earlier described Philamatomyia, the 

 supposed difference in the proboscis seeming to be a miscon- 

 ception. 



Genus Glossina, Wiedemann : Tsetse-flies. 



The genus Glossina is distinguished from all other Musdda: 

 by certain peculiarities of the antennae, of the wing venation, 

 and of the method of reproduction— peculiarities so decided 



