r 
644 A TRIP TO PIPESTONE QUARRY. 
recommends the “use of the Persian Insect Destroyer, one 
package of which suffices for a good sized dog. The powder 
should be well rubbed in all over the skin, or the dog, if 
small, can be put into a bag previously dusted with the pow- 
der; in either case the dog should be washed soon after.” 
One of the most serious insect torments of the tropics of 
America is the Sarcopsylla penetrans, called by the natives 
the Jigger, Chigoe, Bicho, Chique, or Pique (PI. 13, fig. 8, en- 
larged ; a, gravid female, natural size). The female, during 
the dry season, bores into the feet of the natives, the opera- 
tion requiring but a quarter of an hour, usually penetrating 
under the nails, and lives there until her body becomes dis- 
_ tended with eggs, the hind-body swelling out to the size of — 
a pea; her presence often causes distressing sores. The 
Chigoe lays about sixty eggs, depositing them in a sort of sac 
on each side of the external opening of the oviduct. The 
young develop and feed upon the swollen body of the parent 
flea until they mature, when they leave the body of their 
host and escape to the ground. The best preventative is 
cleanliness and the constant wearing of shoes or slippers 
when in the house, and of boots when out of doors. 
Nore. — All the figures on Plate 13, except 8 a, are enlarged. 

A TRIP TO THE GREAT RED PIPESTONE QUARRY. 
BY C. A. WHITE, M. D. 

Tue Great Red Pipestone Quarry, from whence the In- 
dians occupying a large portion of the North American con- 
tinent have from time immemorial obtained the material for 
their pipes, has become almost as famous among those who 
speak the English language as among the aborigines them- 
selves, who, to some extent at least, regard it as a sacred 
place. This is largely due to the interest which has been 
prs 
