1930 ] Development of Dermatobia hominis 341 
few moments, when it again withdrew. Ten minutes later 
it again began to come out, and this time continued very 
slowly and steadily to emerge. The emergence covered a 
period of about one-half hour. The exact infestation peridd 
of this larva was 50 days and 15^4 hours. 
December 3. The last larva, No. 5, has been alternating 
between enlarging the hole of the lesion and protruding 
its posterior end during the past four days, until it 
emerged some time between 12 :30 and 6 o’clock this, morn- 
ing. It emerged and crawled outside the bandage without 
awakening me, and was found in the bed at 6 A. M. It 
was rather surprising to find that this larva was the small- 
est of the six. It was expected that since it had been 
located in an area with an abundance of muscular and 
adipose tissues together with its longer period in situ, 
about 54% days, that it would be the largest. 
A slight exudate continued from the lesions until from 
three to five days following the emergence of the larvae. 
Then as the discharge ceased and the swelling subsided 
the apertures soon healed. 
With the exception of No. 6 the scars left by the lesions 
were very slight ones. Eight months later well-colored 
purple and brown spots still mark the sites of the two 
openings of No. 6. 
The size and weight, taken within two hours after emer- 
gence of each of the larvae were as follows: 
Larva No. Length Diameter Weight 
1 22 mm. 10 mm. 0.692 gram. 
2 20 mm. 9 mm. 0.575 gram. 
3 25 mm. 11 mm. 0.725 gram. 
4 24 mm. 11 mm. 0.740 gram. 
5 20 mm. 7 mm. 0.480 gram. 
6 20 mm. 8 mm. 0.520 gram. 
Soon after each larva emerged it was placed in damp 
sand and sawdust to pupate. The pupation periods were 
from twenty-two to twenty-four days, at the end of which 
time the adult flies emerged. 
