50 University of Michigan 



also with two rows of rounded tubercles, the fourth with an 

 irregular series of smaller tubercles between the other two, 

 two large, rounded tubercles on lateral margin of keel. A 

 typical metazonite of middle region of body has the dorsal 

 surface divided into large polygonal areas, which are more 

 distinct toward the sides, these forming two transverse rows 

 of mostly eight areas each ; these larger areas bear densely 

 arranged smaller tubercles. Lateral margins of poriferous 

 metazonites convex, each with a very large, rounded tubercle 

 through the ectal face of which the pore opens. Suture 

 between metazonite and prozonite longitudinally striate as in 

 constrictus. Prozonites finely granular above. (PI. 19, Figs. 

 126, 127.) 



Cauda triangularly narrowed caudad, narrowly truncate 

 at tip ; caudal surface bearing six setae ; two setae on each 

 side and a pair above, in front of a more widely separated 

 pair on basal portion of tergite. 



Sterna very wide, as usual, but narrower than the tergites 

 exclusive of keels; not granular or tuberculate. Sterna from 

 thirteenth to eighteenth bearing small spines in the usual posi- 

 tion adjacent to the posterior legs, the nineteenth segment with 

 a pair of very much larger curved spines. 



Sides of segments smooth, or nearly so. 



Legs not granular, or only very obscurely so, but other- 

 wise typical in form. 



Length, about 15 mm.; width, 2 mm. 



Colombia : San Lorenzo. One female under a log at about 

 6,200 feet, July 19, 1913. 



One broken female at 6,200 feet, July 19, 19 13, and two 

 females from a locality of which the number cannot longer 

 be deciphered. 



