526 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
Pairs of legs 47. 
Length 22 mm. 
Locauity.— Mexico: Hidalgo, Pachuca (W. M. Mann). Type, 
M. C. Z. 1729; one specimen. 
LESTOPHILUS HAITIENSIS, sp. nov. 
Ochraceous, clearer yellow caudad. Head darker, of somewhat 
chestnut cast. Antennae ochraceous. Prosternum and prehensors 
like head. Venter like dorsum or but little paler. Legs yellow. 
Body slender, a little narrowed cephalad; gradually and conspicu- 
ously narrowed caudad. 
Anterior margin of head nearly straight or a little arcuate; anterior 
corners oblique. Caudal margin straight. Head widest just back of 
frontal region. Sides nearly straight, converging caudad to the 
widely rounded caudal corners. Head a little constricted at frontal 
region; 1.4 times longer than wide. Basal plate largely overlapped 
by the head, the exposed portion between 5 and 5.5 times wider than 
long. 
Antennae nearly three times as long as the head plates; stout; 
moderately attenuated distad. Ultimate article not narrowed distad, 
apically rounded; about four fifths as long as the two preceding 
articles taken together. 
Claws of prehensors stout, finely serrulate within proximally; 
when closed reaching to between proximal and distal end of the second 
article; armed at base with a stout subconical black tooth which is 
slightly bent caudad at tip; first distad of the tooth a small dark — 
nodular eminence. Femuroid with a stout, subconical, distally 
blunt or truncate tooth as usual; also with a small dark protuberance 
immediately proximad of basal oblique suture. 
Anterior border of prosternum with two distinct nodule-like teeth 
about as far from each other as each is from the femuroid of the same 
side. Sides straight, a little converging caudad. Wider than long 
in ratio 32:29. 
Dorsal plates bisuleate as usual. The anterior ones, at least, also 
showing a distinct median longitudinal sulcus. A distinct transverse 
sulcus across plates a little in front of the caudal margin. 
All prescuta short, those of the anterior region especially so. 
First spiracle greatly exceeding the second one in size, subcircular 
or slightly vertically elongate. All others circular; gradually decreas- 
ing in size caudad and in the posterior region becoming very small. 
Ventral plates with the usual median longitudinal sulcus and the 
weaker transverse one. Last ventral plate narrow, longer than the 
