6o University of Michigan 



Sterna not granular. Spines of sternites of nineteenth 

 segment as stout at base as the adjacent joint of the leg, nar- 

 rowing distad, curving dorsad, as long as the two first joints 

 of leg taken together. The other spines abruptly smaller, 

 present forward to the tenth segment inclusive. (See PI. 22, 

 Fig. 151.) 



Cauda short and broad, distally truncate or incurved 

 between the two lateral tubercles. Anal scale shown in PL 

 22, Fig. 152. 



Legs of same general structure as in Trachelodesmus, with 

 claw reduced, etc. Xot granular. (PI. 22, Fig. 153.) 



Width, 3.2 mm. 



Colombia : San Lorenzo. One specimen, unfortunately 

 lacking the head and first seven segments, taken in a log at 

 about 6,200 feet. July 19. 1913, along with the type of Tra- 

 chclodcsimts ancyloplior, sp. nov. Holo'^ype, ]\L C. Z., 5,151. 



Trichomorpha tuberculosa, sp. nov. 

 PI. 22, Figs. 154-156; PI. 23. Figs. 157-15^ 



Dorsum black with the keels yellow. . Lower border of 

 clypeus yellow. Antennae brown. Legs brownish yellow. 



Dorsum onlv slightly arched, nearly flat, the keels being 

 at a high level. All keels in the male well developed, with 

 angles on all from the second caudad acutely and strongly 

 produced, becoming particularly long in the caudal region, 

 those of the seventeenth to nineteenth segments with distal 

 ends distinctly curving mesocaudad. Anterior corners of 

 keels rounded, with the usual tooth at lower end of corner, 

 and back of this the ectal edge weakly serrate or serratocrenu- 

 late, the serrations absent on most caudal keels. Caudal mar- 

 gin not truly toothed, bearing usually, however, two setiger- 

 ous tubercles. Dorsal surface of prozonites smooth ; dorsal 



