498 bulletin: museum of comparative zoology. 



Antennae chestnut like the head, paler, yellowish, distad. Presternum 

 and prehensors and last ventral plate bright chestnut. Rest of venter 

 light olivaceous, most plates showing a pair of circular dark spots on 

 anterior border and an elongate one on anterior portion of episterna, 

 each consisting of many fine dots. The pleural region also mottled 

 with similar dark spots and streaks. Legs yellowish or ochraceous; 

 the last pair darker, more or less chestnut; penult legs with prefemur, 

 femur, and tibia ventrally whitish, the whitish area embracing an 

 irregular mottling of fine dark dots. 



Head densely finely punctate. Paired sulci represented merely 

 by very short weak traces on the caudal border. Caudal margin 

 widely convex. 



Antennae short; consisting of the usual seventeen articles. Most 

 articles densely clothed with the usual fine and very short hairs but 

 these on proximal few articles becoming less and less dense and 

 interspersed with longer, coarser hairs. 



Prosternum with dental plates very wide but very short, their 

 anterior margins forming a straight or nearly straight transverse line. 



First dorsal plate with the cervical sulcus strictly semicircular and 

 entirely free from the head. Paired sulci diverging cephalad and 

 terminating at the cervical sulcus. Sulci of the second plate converg- 

 ing cephalad; those of the succeeding ones parallel. Most plates 

 clearly longitudinally furrowed or depressed each side of the middle 

 line and setting off a low keel-like elevation. Last dorsal plate 

 mesally rather abruptly broadly produced caudad, the produced 

 portion truncate; not sulcate. 



Ventral plates, excepting the first and the last three, with a distinct 

 median longitudinal sulcus which does not cross either the anterior or 

 the posterior border. Last ventral plate with sides only very slightly 

 convex, strongly converging caudad; caudal margin widely, sub- 

 angularly incurved. 



Coxopleural process long and slenderly conical, ending in a single 

 spine; otherwise the process and coxopleura wholly unarmed. 



Tarsi of all legs biarticulate. No tarsal spine present. 



Tibia of anterior legs with a ventral spine at distal end but with no 

 lateral one. No spinules on proximal joints of anterior legs. 



Penult legs without spinules. 



Anal legs with prefei^iur bearing ventrally a series of four long, 

 distally curved spines which are shorter than the diameter of the joint; 

 otherwise unarmed. Femur armed ventrally toward mesal side at 

 proximal end with one shorter spine (and in one specimen on one leg 

 with a second spine toward middle of length); otherwise unarmed. 

 Tibia of uniform diameter throughout; more slender than, but equal 

 in length to the femur; unarmed. First article of the tarsus more 

 slender than the tibia though not greatly so; and a little more than 



