OF WASHINGTON. 
41 
There seemed no doubt to Dr. de Haan that it was a genuine 
case of endoparasitism. An acarologist familiar with the al- 
leged habitats of various Tyroglyphids cannot suppress his sus- 
picions in the case. Yet, as it is stated that mites were found 
in every passage of urine, it seems impossible to account for 
FIG 7, Cctrpog lyphus alienus; a, genital openings, Cj and 
$ > b, mandible. 
FIG. 8. Carpoglyphus alienus, legs I and IV. 
their adventitious occurrence. Were the mite of some other 
family it would not be so strange, but that a Tyroglyphid could 
get to the internal organs, other than the alimentary tract, 
seems beyond belief. Yet there cannot be the slightest doubt 
as to the systematic position of the mite as can readily be seen 
from the figures. The nature of the genital openings and the 
position of the long bristle on tibia I seems to place the speci- 
mens in the genus Carpoglyphus. The caroncles are not as dis- 
tinct as in the one known species of this genus, but the position 
of the bristle on tibia I is unique. I shall therefore simply de- 
scribe the species leaving the question of its occurrence to the 
future. 
