NATURAL ENEMIES 
73 
Other observers have studied this parasitic worm, 
which is now placed in the genus Habronema. Hewitt, 
in England, after dissecting many hundreds of flies, 
found only two specimens of this parasite. He feels 
certain that the one found in England is the same as 
the one found by Carter in India. 
The same species occurs in the United States and 
has received some attention from Dr. B. H. Ransom, 
of the Bureau of Animal Industry of the U. S. De¬ 
partment of Agriculture at Washington. Doctor Ran¬ 
som has very kindly given the writer the following 
note, hitherto unpublished, which is sufficiently interest¬ 
ing to print in full: 
“Referring to Habronema musccc, this parasite seems 
to be very common in the house fly. Out of thirty-four 
flies examined between June ioth and July nth, most 
of them caught in the laboratory of the Zoological Di¬ 
vision, the remainder bred from horse manure obtained 
at the Experiment Station of the Bureau of Animal 
Industry, Bethesda, Md., nine were infested. The 
number and distribution of the parasites in these nine 
flies were as follows: 
1. Five in the proboscis. 
2. Six in the head and proboscis, one in the thorax. 
3. One in the head. 
4. Two in the head. 
5. Five in the head. 
6. Two in the head. 
7. One in the head. 
8. One in the abdomen. 
9. Two in the thorax. 
