22,2 Woodworth and Ashcraft: Booponus intonsus 149 



The full-grown larvse leave the flesh and drop to the ground, 

 where they bury themselves and pupate. The great variation 

 in size of pupae seems to be a direct result of the amount of 

 available larval food. The pupal period is approximately ten 

 days. The imago escapes from the pupa case by splitting the 

 operculum, or cap, on the median line, and pushing the two 

 halves aside as flaps. 



Adult. — The adult flies have not previously been observed. 

 The genus and species were described from specimens reared 

 from infested animals on the campus of the College of Agri- 

 culture at Los Banos, Laguna Province. Since the first breeding 

 was made, a few adults have been observed depositing eggs on 

 the feet of a carabao kept at the Forest School at Los Banos. 

 No further records of its occurrence or abundance are extant, 

 nor were specimens of the fly present in the collections of the 

 College of Agriculture, the Bureau of Science, or the private col- 

 lection of Prof. C. F. Baker, previous to its discovery. From 

 the fact that the region around Los Banos is perhaps better 

 known entomologically than any other in the Islands, it would 

 appear that the fly is comparatively rare. Cases of myiasis 

 produced by the maggots, however, tend to show that such is 

 by no means the case. 



Larva. — Twenty cases of myiasis caused by this fly subsequent 

 to its recognition, have been recorded in the clinic of the College 

 of Veterinary Science at Los Banos. Previous to that time there 

 were undoubtedly other cases, but they were probably confused 

 with myiasis produced by the screw worm, Compsomyia dux 

 Eschscholtz, a very common and harmful pest of stock in the 

 Philippines. The effects of infestations of the foot maggot are 

 quite definite and distinctive. From these effects it has been 

 possible to gather some data on the relative abundance of infes- 

 tations. The college herds were examined, with the results 

 indicated in Table 1. 



1 - 



Hosts. 



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