DESCRIPTION OF GENERA AND SPECIES. 275 
diameters or more; side eyes widely separated, the space between them being at least half 
greater than that which separates SF and MF (8b); the distance between SR and MR is 
scarcely as great as that between MR; the front row distinctly procuryed, the rear row 
much recurved. 
Leas: 1, 4, 2, 3; stout, especially at the femora of legs-I and IV; color yellow, with 
brown and blackish brown median and apical annuli; the femora almost completely dark- 
ened; the metatarsi long, and on the fourth leg (3d) curved and provided with a calamis- 
trum. The legs have short pubescence and fine bristlelike spines; tibia-I is thickened and 
has an apical brush, to which the species owes its name. The palps are colored and armed 
as the legs. 
Anpomen: An elongated oval, thickest at the base, which is bifid and overhangs the 
cephalothorax; it is there provided with two low shoulder humps; the dorsum is arched 
to the spinnerets, which are distal and provided with a cribellum (8e); the color is yellow 
or eretaceous, reticulated and marked with blackish brown median stripes with divergent 
branches to the sides, which are streaked with black and yellow. In some specimens 
(Fig. 4) the colors appear to be reversed and the field black, while the folial markings are 
yellow. The venter is a broad band of yellowish brown with an indented border of creta- 
ceous, which surrounds in a broken line the spinnerets, which are yellow flecked with 
brown; the epigynum (8c) shows two rounded conical projections from the atriolum of a 
light yellow color, overhanging and projecting beyond the genital cleft. ‘The male (Fig. 5) 
is colored and marked like young females (Fig. 4). 
Mate: Total length, 2.5 to 3 mm. The cephalothorax is more roundly ovate than the 
female. The eyes (Pl. XXVIII, 6a) differ little in arrangement, but the front row rather 
shorter relatively. The legs are yellow, femur-I being darker, and others with light 
median and apical annuli underneath. The tibia of the first pair bearing upon the 
upper surface a double row of spines on one side long and yellow, on the other shorter 
and blackish, and eight to nine in number; other joints with a few yellow spines. The 
two terminal joints are decidedly thinner than the others. The metatarsus is as long as 
the tibia; the fourth pair of legs without calamistrum. The abdomen is without humps, 
is an elongated oval, blackish in color, and the folium irregularly traced by long grayish 
yellow hairs; the entire surface is hairy. The color of the cephalothorax is dark brown, 
with a median line of yellowish marked by long gray hairs. The palps are short, the 
digital joint large, globular; the radial and cubital joints are of nearly equal length; a 
short blunt spur projects outwardly from the humeral joint (Pl. XXVIII, 6b); the eymbium 
covered with reddish yellow hairs. (Marx Collection.) 
Distripution: I have taken this spider in New England, Pennsylvania, and Ohio; 
Hentz described it from Alabama, and I have various specimens received from the Pacific 
Coast. It is probably distributed throughout the entire United States. 
Genus HYPTIOTES, Watcxenazr, 1833. 
But one American species of this remarkable genus is known, whose characteristics are 
so striking that it cannot be easily mistaken. The cephalothorax is an oval with steep 
sides, truncated at the base, which shelves sharply downward from the fosse. The corselet 
is overhung behind by the vaulted abdomen, and almost overshadowed in front by the 
peculiar structure of the face. The sternum is cordate, decidedly longer than wide, 
widest at the base, with distinct sternal cones. The labium is small as compared with the 
maxillx, compressed at the base and triangular at the tip, the length about half that of 
the maxillze, which are somewhat longer than wide, compressed at the stalk, and much 
widened at the squarely truncate tips. ‘‘he yes are arranged in two rows, of which the 
front is strongly procurved, and the rear row, at least 2.5 times as long as the front, is 
slightly procuryed. The two sidefront eyes are very small and placed close to the margin 
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