18S BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
clavately enlarging half nearly smooth, (Plate 4, fig. 1). Tarsus I 
with five segments; II with six articles of which three are in the second 
division; III with six which are clothed ventrally with numerous fine 
hairs and none of which is specially enlarged, but the metatarsus is 
greatly enlarged toward its distal end which is abruptly narrowed 
and resembles a tarsal article in form and pubescence, while from the 
ventral surface toward proximal end arises a very large, abruptly 
curved branch or process, (Plate 3, fig. 8). 
Length of type 7.8 mm.; greatest width of carapace 6.1 mm. 
Length of leg I cir. 9 mm.; of leg Il, 16 mm.; of leg III, 12+ mm.; 
of leg IV cir. 17 mm. 
Locahty.— Lucma, 7,000 feet, August 7. (Type, M. C. Z. 129, 
one male; paratypes, 130, two males). 
PACHYLUS ORINUS,! sp. nov. 
Plate 5, fig. 1-3. 
Body strongly narrowed cephalad; conspicuously constricted both 
laterally and dorsally along first furrow just back of eye-region and 
nearly in line with coxae of third legs; widest a little back of con- 
striction where the sides are convexly rounded and from where the 
body narrows caudad to end of abdomen with no constriction be- 
tween cephalothorax and abdomen; abdomen caudally semicircularly 
rounded. 
Carapace with five transverse sulci of which the most anterior lies 
in the previously mentioned constriction and at its middle is bent 
caudad at a distinct angle; the second one forms a slight angle at 
middle with apex cephalad, while the other sulci are straight; no 
connecting longitudinal median suleus excepting a very weak one 
between the first and second. LEvye-tubercle sharply set off, about 
equal in length and breadth; the cone between eyes high and acute; 
eye-tubercle separated by a transverse furrow or depression from the 
conspicuously elevated frontal border. Lower frontal margin deeply 
notched or excavated for insertion of mandibles and betweerthe two 
notches extending ventrad in a spiniform process, otherwise unarmed; 
unarmed above. Carapace with lateral borders strongly elevated, 
the marginal ridge over its middle, ectally curving portion conspicu- 
1opecvos, a Mountaineer. 
