504 bulletin: museuai 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 sulcus. 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 {d"). 



Length between 190 and 200 mm. Greatest width of body 4 mm. 

 Width of widest tergite, 3 mm. 



Locality.— Haiti: Grand Riviere (\V. M. Mann). Type, M. C. Z. 

 1732, one male. 



