Acarina 
269 
and II of the male not unusually 
stout. T. americanus. 
qq. With other characters and habits. 
T. lintneri (fig. 150 f) the mushroom 
mite, and several other species, 
mm. Cephalothorax with but two long distinct 
bristles (besides the frontal pair), but some¬ 
times a very minute intermediate pair; 
tarsi I and II unusually short and not twice 
as long as the preceding segment, 
n. Tarsi with some stout spines. Rhizoglyphus Clap. 
The species of this genus are vegetable feed¬ 
ers. Several occur in the United States. 
R. parsiticus and R. spinitarsus have been 
recorded from the old world, attacking human 
beings who handle affected plants, 
nn. Tarsi with only fine hairs. . Monieziella Berl. 
The species of this genus, as far as known, 
are predaceous or feed on recently killed 
animal matter. Several species occur 
in the United States. M. (= Histiogaster) 
entomophaga (fig. 152) from the old 
world has been recorded as injurious 
to man. 
gg. Genital suckers absent; integument with fine parallel lines. 
Parasitic on birds and mammals, 
h. Possessing a specially developed apparatus for clinging to 
hairs of mammals. Listrophorid.e. 
hh. Without such apparatus. 
i. Living on the plumage of birds . Analgesid.-e. 
ii. In the living tissues of birds and mammals. 
j. Vulva longitudinal. In the skin and cellular tissues of 
birds. Cytoleichid.e. 
This family contains two species, both occurring in the 
United States on the common fowl. Laminosioples 
cysticola occurs on the skin and also bores into the 
subcutaneous tissue where it gives rise to a cal¬ 
careous cyst. Cytoleichus nudus is most commonly 
found in the air passages and air cells, 
jj. Vulva transverse. In the skin of mammals and birds 
. SARCOPTIDjE 
k. Anal opening on the dorsum. 
I . Third pair of legs in the male without apical suckers. 
On cats and rabbits . Notoedres Rail. 
The itch mite of the cat, N. cati (fig. 61) has been 
recorded on man. 
II . Third leg in the male with suckers. On bats. . . . 
. Prosopodectes Can. 
