THE FLIES THAT CAUSE MYIASIS IX MAX 



71 



This is the most important sheep maggot in South Africa. It also 

 occasionally infests wounds in cattle and in man. There is on record 

 one case of intestinal myiasis in man which appears authentic, al- 

 though determinations were made from the larvae alone. 



Literature. — Smit (l^S) gives an account of the life history and 

 immature stages of this fly. 



CHRYSOMYA RUFIFACIES (Macquart) 



Synonyms. — Achoetandrus rufifacies (Macquart) ; Liuilia tasmcmiensis Mac- 

 quart. This species has been confused with Chrysomya albiceps (Wied.), and 

 the literature on that species from the Australian Region and for the most part 

 from the Oriental Region refers to C. rufifacies. 



Recognition Characters. — Adult : Sufficiently characterized in the key. 

 Larva: The larva is one of the hairy maggots of the C. albiceps type: that is. 

 the body possesses a median row of fleshy tubercles on each segment, which gives 

 the maggot a hairy appearance. The mature larva is about 14 mm. in length 



Figure 33. — Chrysomya chloropyga: A. Larva; B. posterior spiracles of larva. 

 (After Smit (14$, p. 369).) 



and dirty yellowish. The peritreme of the posterior spiracle is very wide, its 

 gap narrow, and the edges of the gap forked ; the slits are short and wide, and 

 almost fill the plate. 



Geographical Distribution. — Palaearctic Region: Japan. Oriental Region: 

 Baluchistan. India, Ceylon, Federated Malay States, Sumatra. Java. Celebes. 

 Australian Region: Western Australia. North Australia. South Australia, 

 Queensland, Canberra, New South Wales, Victoria, Tasmania, New Zealand, 

 New Caledonia, New Hebrides (Espiritu Santo Island). Saipan, Solomon Islands. 

 Samoa, Fiji. Society Islands, Marquesas Islands. Tonga (Friendly Island), 

 Hawaiian Islands. 



Biology and Pathogenesis. — This is a sheep maggot fly in Aus- 

 tralia but is purely secondary; in fact, there is evidence that in the 

 second and third instars it is a predator upon primary parasites, and 

 may therefore be considered beneficial. This species has been used 

 successfully in the treatment of osteomyelitis, and. if it does invade 

 human tissue, probably does so only as a scavenger. 



Literature. — The status of this species, which has been confused 

 with ( . putoria and C. albiceps^ was clarified bv Holdaway (59, ]/.* 

 o-W). 



