Sa = 
mestic cattle, both in this country and Europe, throw considerable 
doubt on this supposition, and also leave the question of its original habi- 
tat in doubt. Two flies referable to this species, a male and a female, 
were bred by Dr. Cooper Curtice, April 16, 1891, from larve extracted 
from the back of an animal. I have also a specimen from Prof. Her- 
bert Osborn, reared from a bot collected in Hlinois. Careful examina- 
tion of these specimens, together with the balance of the material in 
the National Collection, comprising in all some 33 specimens, shows that 
they all belong to lineata. Of this material 16 specimens were re- 
eelived from correspondents as the Heel Fly from various points in 
Texas; two by the same name from New Jersey. one of which was re- 
ported to have been ovipositing just above the hoof of a cow; five speci- 
mens were collected in Colorado, of which one differs from the normal 
type in haying a scantier pubescence on the face; one specimen is from 
southern Georgia and three are without any locality label. In addi- 
tion to the bred specimen from Prof. Osborn, he sent for comparison 
three collected specimens taken at Ames, lowa, and one in Colorado. 
An examination of the larve in the National Collection also shows a 
full agreement with the larve of lineata. These are from Arkansas, 
Texas, Illinois, Nebraska (three of which were taken from a buffalo bull 
by Mr. L. Bruner), and others without date or locality. Dr. Salmon 
also has a large series of larve numbering above 500 specimens, all of 
which were examined by Dr. Curtice and by myself and Mr. C. L. Marlatt, 
and prove to belong to lineata. These were taken for the most part at 
the Washington abattoir and from cattle from Virginia, West Vir- 
ginia, Ohio, and Maryland. A large number of them were, however, 
taken in Texas, and others came from various localities. I have cor- 
responded also with Dr. Williston and a number of others who either 
have private collections or are in charge of public collections, and have 
been unable to secure from any source whatever either a larva or 
adult referable to bovis and collected in this country. My examina- 
tion of this material has been greatly facilitated and the results made 
more conclusive by the kindness of Dr. Brauer in sending, at my re- 
quest, authentic specimens of the larva, puparium and adult of H. bovis. 
LIFE-HISTORY OF HYPODERMA LINEATA. 
Chiefly through the investigations of Dr. Cooper Curtice, late of the 
Bureau of Animal Industry of this Department, some curious and anom- 
alous facts have been discovered, which have thrown a good deal of 
light on the actual life-history of this bot-fly,and have shown the pre- 
viously accepted views to be erroneous. A preliminary notice of these 
facts was given by Dr. Curticein INSEcT LIFE, Vol. 0 (pp. 207, 208), and 
a full account has since appeared in the Journal of Comparative Medi- 
cine and Veterinary Archives, Vol. X11, pp. 265-274, June, 1891. Dr. 
Curtice had not witnessed the actual mode of oviposition or the position 
of the eggs in a state of nature, nor has anyone recorded the facts up to 
