Occasional Papers of the Museum of Zoology 23 



across dorsum by deep and coarse punctiform impressions; 

 widely and moderately curved opposite pore. Pores small, 

 each situated just in front of caudal edge of dark bend of 

 metazonite. Metazonites deeply striate beneath and half-way 

 up the side to the pore, the upper striae incomplete caudally, 

 only crossing or but little surpassing the dark band of 

 metazonite. 



Last tergite caudally rounded, greatly exceeded by the anal 

 valves. Anal valves mesally compressed and strongly elevated, 

 the free edges evenly convex. (PI. 12, Fig. 80.) 



Anal scale as shown in PI. 12, Fig. 81. 



Characterized especially by gonopods of male, which are 

 represented in PI. 12, Figs, yj and 78. 



Leg of sixth segment of male as represented in PI. 12, 

 Fig- 79- 



Number of segments, 55. 



Length of male, about 40 mm. ; width. 3 mm. 



British Guiana : Near Demerara River, "Cacao Plantation 

 about camp." Rotten logs. July 16, 1914; F. ]\[. Gaige. One 

 male and three females. Also, "East trail along Demerara 

 River, collected in the wet earth close to the high tide mark, 

 a common form." Aug. 8, 1914 ; F. M. Gaige. Ten specimens. 



Labba Creek Sand Hills; July 27, 19 14. In sandy soil of 

 forest floor. Two females. Holotype, ^L C. Z.. 5.077. 



Nanostreptus astix, sp. nov. 

 PI. 12, Figs. 82-84: PI. 13. Fi- 85 



This closely parallels in its general structure the preceding 

 species. The type appears considerably lighter in color than 

 those of the latter species, lacks the lateral dark lines and has 

 the middorsal line absent or but obscurelv indicated on some 



