28 University of Michigan 



Xuinber of segments, 55 to 57. 



Length, to near 80 mm. ; width, 6 mm. 



Colombia: Fundacion River ; Aug. 12, 1913. Four females. 

 Holotype, ~Sl. C. Z., 5,090. 



Spirostreptus atoporus, sp. nov. 

 PI. 13, Figs. 90, 91 



While, in the absence of males, the narrower generic posi- 

 tion of this species is doubtful, its characteristics are so pro- 

 nounced that its recognition cannot give much difficulty, and 

 it" is accordingl}- here redescribed under Spirostreptus sens. kit. 

 The fully developed color pattern shows a caudal ferruginous 

 band about each metazonite, limited in front by a narrow, 

 dark brown band passing into greyish-blue on anterior part 

 of metazonite and on prozonite, the latter encircled also by a 

 narrow brown stripe near edge of overlapping preceding meta- 

 zonite. In some paratypes there is simply a ferruginous to 

 fulvous caudal ring with a broader median dark brown to 

 nearly black ring, and the covered part of prozonite again 

 light, or the secondary darker stripes showing indistinctly. A 

 middorsal dark line, and one also more or less evident on each 

 side at level of pores. Collum bordered with dark, its median 

 part areolated with light. Legs ferruginous. Four partly 

 fused light spots between bases of antennae. 



Clypeal foveolae 2-\-2. Eyes rather small, the inner ends 

 narrowly rounded or subangular, two and two-thirds, or a 

 little more, their greatest diameter apart. Ocelli about 23, in 

 four series; c. g., 7, 7, 5, 4; comparatively large. Outer face 

 of cardo of mandible with caudal edge curving evenly into the 

 distal one, the lower end angled only cephalo-distally. (See 

 PI. 13, Fig. 90.) 



