62 University of Michigan 



paler at distal end. The legs thus have a more or less banded 

 appearance. 



Dorsum but weakly arched, with the keels high and form- 

 ing an obtuse angle with adjacent part of metazonites. All 

 keels from second caudad wnth posterior angles acutely and 

 strongly produced, the processes becoming longer and also 

 curved distally, more curved caudad, though the curvature is 

 never strong. Lateral margins of keels nearly smooth, show- 

 ing, however, a weak and often vague serration behind the 

 anterior corner and usually two similar ones caudad of this 

 at points of insertion of setae. Caudal margin of keels not 

 dentate. (C/. PI. 24, Fig. 164.) 



Surface of metazonites with transverse sulcus distinct. 

 Both in front and caudad of sulcus the surface is entirely 

 divided by deep impressions into tubercle-like elevations which 

 are mostly longer than wide and each of which bears a seta ; 

 there are two series of these areas behind the sulcus and 

 three somewhat irregular ones in front, the tubercles of the 

 latter more weakly developed in the middle region. General 

 •dorsal surface of keels convexly elevated, the tubercles over 

 this elevation small. (C/. PI. 24, Fig. 164.) 



Anal scale as shown in PI. 23, Fig. 159. 



In the male the tarsal pads of legs cease abruptly at the 

 tenth pair. Femur of seventh legs curved, apppearing exca- 

 \-ated below, the proximal end below bulging roundly but with 

 no true process. (PI. 24, Fig. 163.) 



Gonopods of male as shown in PI. 23, Figs. 161-162. 



Length of male. 20 mm. ; width, 2.4 mm. 



Colombia : San Lorenzo. A male and female taken in 

 forest at 4,000 feet ; July 14, 1913 ; F. M. Gaige. 



