OF WASHINGTON. 139 
Lcelaps macro pilis n. sp. 
Pale yellowish. Body elliptical, rather bluntly rounded behind, not 
narrowed in front. Dorsum irregularly pitted and roughened; provided 
in the cephalic part with 'about twelve bristles, short, and not very con- 
spicuous, four in a sub-m^fcan row each side; behind with ten very 
large and long bristles, as long as half the width of body, four pairs of 
them sub-marginal, the other pair sub-central. Legs rather slender, 
the hind pair longer than the body, the fore pair nearly as long, the tarsi 
very slender; all legs provided with quite long fine hairs. Ventral shield 
of male almost covering entire venter, much broadened behind hind coxae. 
Length .4 mm. 
On water hyacinth, Bustis, Florida (Webber) . It is figured 
on page 59 of the "Treatise." 
Dinychus americanus n. sp. 
Color yellowish, legs paler. Body sub-pyriform. Dorsum densely 
strewn with sub-circular pits, those in the median area smaller than the 
others, those on the sides plainly larger than in the European D. inermis. 
Epistoma rather broader at tip than at base, and broadly rounded. Seen 
from above there is on each side a slight projection between legs i and 
ii. The peritreme at first runs nearly straight, then bends back on 
inner side, then curves forward some distance parallel to coxae ii. Legs 
slender, short, tarsi long, and ending in a long caroncle. The nymph 
has a slender sternum, even more slender than in D. inermis. 
Length .5 mm. 
College Station, Texas, in cotton-seed meal. It is figured 
on page 63 of the "Treatise." 
Pigmephorus americanus n. sp. 
Pale yellowish. Body sub-oval, almost truncate behind. Dorsum 
smooth; about 8 long stiff bristles on each side margin, somewhat imbri- 
cated; posterior part of dorsum with a sub-marginal row of three long 
bristles on each side, also a dorso-humeral bristle, and a pair in front, 
rather widely separate. Segmentation of abdomen quite distinct in 
middle, not seen on margins. Legs rather slender, but short; with many 
hairs. The claws of leg i sunken under an apical projection of the tarsus 
other claws exserted. 
Length .25 mm. 
Several specimens taken from a fly (Platycnemis imperfecta) 
in the District of Columbia (No. 6984). It is figured on page 
77 of the "Treatise." 
Disparipes americanus n. sp. 
Pale yellowish, anterior border of body hyaline. Anterior part of 
body semi-circular, posterior part rather more elongate but broadly 
rounded behind. A long, stout humeral bristle, and four on each posterior 
side-margin. Legs short and stout, pair iv stouter than others, the 
