1947] 
Acarina from North Carolina 
129 
more narrow than the anal, and a little shorter, its sides 
nearly parallel, each cover with abont nine hairs as in 
figure ; the anal opening connected to the genital, the sides 
are curved outward, the covers not occupying available 
space, and each cover with a row of four barbed bristles. 
The legs are very short and stout, the front pairs 
heavier than others, the femora are narrowed at base, 
and the tibiae are concave on inner edge, there are some 
hairs chiefly on tarsus, some on the hind legs are barbed 
hairs, and also some on outer side of femora one and two 
are broadened scale-like and roughened; the single claw 
is very long, the curve mostly near tip ; a long hair at tip 
of tibiae. 
Length .28 mm. 
Several specimens from Duke XTniv. Forest, Durham, 
N. Car., 21 Oct., 4, 25, Nov. (Pearse). Type M.C.Z. 
Araclm. 3015. 
LABIDOSTOMMATIDNE 
Labidostomma mamillatus Say ( Erythrceus ) 
Figs. 4, 12, 18 
Say’s species lias not been recognized previously; Jacot 
suspected it might belong to Labidostomma, but none had 
been taken since Say’s time. In 1930 I took one in the 
Smoky Mts. of North Carolina, and Prof. Pearse sends 
several specimens taken at Duke Forest. 
The mandibles above are mostly covered with an ar- 
rangement of imbricated rounded scales (castanulate) ; 
the jaws are smooth, and slightly outcurved at tip. On 
the swollen part of mandible not far from base of the 
jaws is a sloping tubercle, tipped by a long, fine bristle. 
Each side of the front margin of the body ends in a sharp 
point, also tipped by a bristle. 
A short distance behind the front is a transverse, nearly 
parallel ridge, most prominent on the sides, between this 
and the front margin the surface is sculptured as on the 
mandibles and also in a median raised region behind the 
ridge, elsewhere the sculpturing is less perfect, tending 
to be reticulate or granulate. Each side of the median 
raised area is a fairly prominent clear spot with a hair, 
possibly corresponding to stigma and seta; a few smaller 
