PARASITES OF FLIES 



239 



H. imisciB-doniesticcE in three dung-flies, Scatophaga bitaria F., 

 Neuronecta anilis Fallen., and Fannia sp. The larvae of these 

 species were also found to be infected, but it seems probable 

 that the infection of the adult was freshly acquired. 



Species have been described and named from several kinds 

 of flies by different observers. Swingle (191 1) and Swellengrebel 

 (1912) in blow-flies. Swingle (1911) and Patton (1909) in flesh- 

 flies, Patton (1908), Roubaud (1908) and Strickland (1912) in 

 greenbottles, and Chatton and Alilaire (1908) in fruit-flies. 



How far the forms described by these observers are different 

 species it is at present difficult to ascertain. Mackinnon (1910) 

 has suggested that there has been needless sub-division of this 

 genus without consideration of the adaptability of one species to 

 several hosts. This surmise is probably correct. 



The species of Herpetomonas hitherto described in non-biting 

 flies are sriven in the followinsf table. 



TABLE 31. 



Variety of 

 Herpetomonas 



H. iniisca-doniesticcB 



Species of Herpetomonas found in 

 no}i-biting flies. 



H. sai-cophaga 



H. lineata 

 H. calliphorce 



H, {Leptomonas) mesiiili 



H. Lucili(€ 



H. mirabilis 



H. [Leptomonas) drosophila 



Host 



M, doDiestica 



F. scalaris 



P. rudis 



Lticilia sp. 



P. putoritim 



S. ltd aria 



N". anilis 



Fannia sp. 



S. hcemort-hoidalis 



Sarcophaga sp. 



S. lineata 



C. coloradensis 



C. erythrocephala 

 Liicilia sp. 



P. piitoriuni 



D. confiisa 



Observer 



Leger (1903) 

 Roubaud (1908) 

 Mackinnon (1910) 



Prowazek (1904) 

 Patton (1909) 

 Swingle (191 1) 



Swellengrebel (191 2) 

 Roubaud (1908) 

 Strickland (19 12) 

 Roubaud (1908) 

 Chatton and Alilaire (190S) 



The presence of these parasites seems to have little effect on 

 the fly. 



