40 Uniicrsily of Michigan 



Median sulcus of head interrupted at level of eyes. Cly- 

 peal foveolae 2-|-2. Antennae very short, with only four sen- 

 sory cones. Eyes small, subcircular. 



Collum rounded at each end, with a short margining sulcus 

 across the end on each side. Surface densely but very finely 

 punctate and punctolineate. Second tergite extending a little 

 below end of collum on each side. The typical segments of 

 body have the suture sharply impressed throughout, the seg- 

 ments a little constricted at its level ; suture bending angularly 

 a little away from pore at level of latter. Pores minute. Cov- 

 ered portion of prozonite smooth. Exposed portion of prozo- 

 nite anteriorly, with two fine transverse striae across dorsum. 

 The prozonite and metazonite in general with numerous 

 minute impressed points and short lines running out from 

 these points as frequent in Trigoniulus, these more marked 

 on the prozonite than on the metazonite. Segments longitudi- 

 nally sharply striate beneath. 



Last tergite smooth, with a subcylindrical cauda which is 

 rounded at the end and extends beyond the anal valves. (PI. 

 i6, Figs io6, 107.) Anal valves not margined, the mesal bor- 

 ders rounded, slightly compressed, but not set ofif. Caudal 

 margin of anal scale convex. 



For gonopods of male, see PI. 16, Fig. 108. 

 Number of segments: female, 45 to 46; male, 43. 

 Length, 42 mm. ; width, 4.7 mm, 



Colombia : San Lorenzo. Under leaves and logs at 2,500 

 feet; July 15, 1913. Four females. At 4,500 feet, in stumps; 

 July 5, 1913. Three females. 



Under log, 4,500 feet, July 2, 1913. One female. 

 Under log, 4,500 feet, July 3, 1913. One male. F. M. 

 Gaige. 



Holotypc, M. C. Z., 5,114. 



