Occasional Papers of the Museum of Zoology 43 



nounced toward the keels, with their surface more convex 

 and the tubercles correspondingly more distinct. 



In the last tergite the cauda has the caudal margin convex 

 and crenate, while the lateral margins are essentially straight 

 and smooth, excepting a single setigerous notch. 



Sternite of fourth segment anteriorly, between fourth legs, 

 with two straight conical processes, and with two smaller con- 

 ical processes between fifth legs. The sternite of the fifth 

 segment also bears two pairs of similar processes, of which 

 those of the posterior pair are much more widely separated 

 than those of the anterior pair. 



In the gonopods of the male there is near the middle of 

 the principal distal branch an acute tooth below, and one or 

 sometimes two smaller teeth proximad of the acute distal end. 

 (See, further, PI. 17, Figs. 112 and 113.) 



Length of male, about 42 mm. ; width, 6.8 mm. 



Colombia : San Lorenzo. Four specimens taken under a 

 log at 4.500 feet, July 2, 1913. Ten specimens, partly imma- 

 ture, on logs at 3,000 feet, July 16, 1913. One male and two 

 females in stumps at 4.500 feet. July 4, 1913. F. ]\I. Gaige. 



Cincinnati Cofifee Plantation. One male and three females, 

 one immature, taken in a rotten log, July 2, 1913. A. S. 

 Pearse. 



Holotype. ]\I. C. Z.. 5.120. 



Pycnotropis cylindroides, sp. nov. 

 PI. 17. Figs. 114-116 



Dorsum a dull or grey olive brown throughout, the keels 

 not lighter in color, or somewhat more reddish than dorsum ; 

 the olive cast sometimes not apparent. (Male type.) Anten- 

 nae light brown. Legs yellow to light brown of slight olive 

 tingre. 



