72 University of Michigan 



dilute olive yellow to olive grey, the distal articles having a 

 weak pink tinge. All articles of antennae with pink tinge. 



jMargin of collum curving widely and evenly about each 

 antero-lateral corner to caudal corner, which is nearly rectan- 

 gular in general outline, though with its apex founded as 

 usual. Surface smooth excepting for the usual network of 

 fine impressed lines. 



The anastomosing lines of the metazonites of the segments 

 of median and posterior regions much more deeply impressed, 

 producing a strong roughening which is heightened by pro- 

 nounced rugae, particularly on the more posterior plates; dis- 

 tinct polygonal areas are also set off. Low tubercles irregu- 

 larly developed, particularly along caudal borders. Keels mod- 

 erately broad. Pore swelling evenly passing into ordinary 

 marginal elevation in front, not set off. Posterior angles of 

 keels not truly produced in segments in front of the sixteenth, 

 the angle bulging slightly caudad first on the seventh keels. 

 Posterior margin of keels often rather finely uneven, but not 

 presenting a true tooth, or such only occasionally indicated. 

 See further PI. 2y, Fig. i88. 



In the gonopods the terminal blade is much broader Jthan 

 in those of tamocalamis, etc., and the major tooth below the 

 apical prong is on the mesal edge as in riparius Carl, the outer 

 edge presenting merely several low serrations. See further 

 PI. 27, Fig. 188. 



Length, about 48 mm. ; width, 9.5 mm. 

 Colombia: San Lorenzo; July 5, 1913. One male taken 

 in a stump in woods at 4.500 feet. Holotype, '\l. C. Z., 5,178. 



