612 Wisconsin Academy of Sciences, Arts, and Letters. 
There are neither tubercles nor depressions. The falces pro¬ 
ject forward, but are not horizontal. They are rather short, 
and are convex above, with small fangs. There are two teeth 
on the upper and one bifid tooth on the lower margin. The 
sternum is nearly as wide as long, cordate, and widely trun¬ 
cated in front. The front coxse are separated by fully the 
width of the labium, which is about as wide as long. 
In fuscus, the type species, of which we have only the fe¬ 
male, the relative length of the legs is 4312. The first and 
second legs have three pairs of spines under the tibia and two 
under the metatarsus, besides lateral spines. The third and 
fourth legs have many strong spines, there being two circles 
on the metatarsus of the third and three on the metatarsus of 
the fourth. 
The width of the sternum and labium brings this genus close 
to Microhasarius E. S., but it differs in the spinal armature 
and in the shape of the cephalothorax. 
Maileus fuscus sp. nov. 
$. Length 5.5 mm. Legs 4312, first pair a little the stoutest. 
The ground color of the cephalothorax is dark on the sides 
and brown in the middle. The sides are covered with yellow¬ 
ish-red hairs and have a white line around the lower margin. 
A central longitudinal white band extends from the middle of 
the cephalic to the middle of the thoracic part. Around the 
eyes the hairs are bright red. The clypeus is low with a few 
white hairs. The abdomen has a central longitudinal scalloped 
white band, in the middle of which is a dark line, ending, be¬ 
hind, in two chevrons. The upper sides are mottled brown, 
and the lower sides are white, spotted with brown and black. 
The palpi are pale, and the legs pale with dark rings. The 
falces are yellowish. 
One female, from Sarawak. 
Ptocasius gratiosus sp. nov. 
$. Length 8.2 mm. Legs 1342, first and second pairs stoutest. 
The cephalothorax is high with a very rounded upper sur- 
