504 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
similar one on the anterior portion; 1.37+ times wider than long 
in type. ; 
Basal plate very short, as wide as or slightly wider than the cephalic 
- plate at its widest level; sides converging cephalad. Nine times as 
wide as median length. 
Antennae moderate in length. First article broadest, the antenna 
being somewhat constricted at third article and then again widening 
to the fifth or sixth from where it narrows gradually to the distal end. — 
Ultimate article shorter than the two preceding ones taken together 
(ratio 10:12 or 13). 
Claws of prehensors when closed reaching anterior margin of head; 
slender. Other joints of prehensors very short. 
Prosternum with a distinct median longitudinal sulcus over the 
caudal half of length; 2.4 times wider than the greatest length of 
the exposed portion. Margin between prehensors widely concave, 
smooth. ‘Two, or a little more, times longer than the greatest length 
of femuroid. 
First dorsal plate 1.5 times longer than the basal plate and consid- 
erably wider, its ends strongly depressed. Second plate longer but 
much narrower than the first. Dorsal plates of most of the body 
with two very sharply impressed longitudinal sulci close to middle 
of plate and a less sharply impressed median one between them, 
these sulci being faint or obscure on the most anterior plates and also 
faint on the last few. Plates otherwise unmarked; obscurely finely 
roughened. 
Anal tergite broad, its caudal half strictly semicircular; 1.5 times. 
wider than long. 
Prescuta very short or quite concealed. 
Most ventral plates a little concavely depressed from edges toward — 
middle; some showing a vague longitudinal median suleus.- Under a 
lens the surface is seen to be very finely, somewhat obscurely, sha- 
greened or tubercular. Last ventral plate short and very broad. 
Anterior and caudal margins straight; lateral margins straight, con- 
verging caudad; three times wider than long. 
Anal legs in the male short, but longer than the penult and much 
stouter, being strongly crassate. Last four articles of about equal 
thickness and the ultimate and penult nearly of the same length. 
Hairs very short, rather sparse. Coxopleurae small, poreless. 
Gonopods of male biarticulate, as a whole conical, the proximal 
article being very broad. 
Pairs of legs 169 (o7). 
Length between 190 and 200 mm. Greatest width of body 4 mm. 
Width of widest tergite, 3 mm. 
Locatiry.— Haiti: Grand Riviere (W. M. Mann). Typ, M. C. Z. 
1732, one male. 
