Occasional Papers of the Museum of Zoology 71 



Length, about 35 mm. ; width, 6.5 mm. 



Colombia: Fundacion; Aug. 19, 1913. One adult female 

 and one immature specimen taken under log on Fundacion 

 River. Also one female in same locality taken Aug. 12, 19 13. 

 Holotype, M. C. Z., 5,174. 



Chondrodesmus virgatus, var. frater, var. nov. 



Similar in appearance to the preceding species, but the yel- 

 low color covering the entire metazonite on all segments, except- 

 ing" a narrow stripe along anterior margin between the keels, 

 which is more or less suffused with the reddish color of the 

 prozonite. Keels entirely yellow. Collum with median region 

 reddish, the Iwrder yellow all the way around, the anterior 

 yellow^ stripe not restricted to median region as it is in vir- 

 gatus. A'enter yellow. Antennae w-hoUy yellow. Legs mostly 

 yellow, a reddish tinge weak and uneven in some. 



Surface of metazonites wholly smooth as in virgatus. 

 Form of keels in general similar; but in the present form the 

 posterior angle of the fifth keels is distinctly produced, not 

 at all rounded as in virgatus. The posterior angle of the sev- 

 enteenth keel is also more produced. 



Length, about 40 mm. ; width, 6.5 mm. 



Colombia: San Lorenzo; July 25, 1913. One female taken 

 under a log at 2,000 feet. Holotype, ]\L C. Z., 5,177. 



Chondrodesmus rugosior, sp. nov. 



PI. 27, Figs. 1S7, ]8S 



Dorsum brown, with keels pale, light olive grey to olive 

 yellow, over entire length. Collum with only the keels light, 

 there being in the type no pale anterior and posterior borders. 

 Head brown, not paler in clypeal region. Legs at present 



