284 
Psyche 
[September 
by J. Miller. Riley and Howard 3 record Cuterebra larvse 
from a mouse — Sitomys calif ornicus at West Creek, Cali- 
fornia. Larvse of this genus have also been found in the 
Meadow Mouse at Provincetown, Mass. I remember that 
while living in Florida I obtained Cuterebra larvse from 
the large wood rat. 
The life history of the Cuterebrinse is quite different 
from the other subcutaneous bots. The flies appear from 
May to July and deposit their eggs, the larvse maturing 
quite rapidly, leaving their hosts in August and September, 
and passing the winter in the ground as pupse. 
The abundance of bots on the Barren-ground Caribou 
( Rangifer caribou Gmelin) in Labrador is well illustrated 
by a skin recently tanned for Mr. Francis Richardson. A 
piece 7 x 10 inches presented to the Museum shows over 
200 perforations, the number in the entire skin far exceed- 
ing 1000. About one-third of these entirely perforated 
the skin, the others represented scars of older perforations 
that had healed. Judging from the antlers the caribou was 
probably about eight years old. The bot fly in all proba- 
bility is Oedemagena tarandi Linn., although a similar 
species O. terrsenovx Knab, is found in Newfoundland in- 
festing Rangifer terrxnovse Bangs. 
3 Insect Life, vol. 6, p. 47, 1893. 
