8G8 Mr. E. I. Pocock on Chilopoda and Diplopoda 



Head stiiolate-punctate and mesially sulcate below, finely 

 stiiolate above, with from 3 to 6 labval pores on each side; 

 eyes large, separated by a space which is rather less than 

 twice a diameter, composed of six transverse rows of ocelli. 



Antennoi short, when extended laterally not reaching the 

 posterior border of the coUum. 



CoUum punctulate and striolate above, laterally narrowed 

 to an angle of about 45°, the apex rounded, the anterior 

 margin obliquely cut away from a point nearly on a level 

 with the eye, sulcate, the second segment projecting below 

 the level of the first ; the rest of the segments longitudinally 

 striate halfway up to the pore on the anterior segments, 

 and not so high posteriorly ; the upper surface very closely 

 and finely transversely striolate in front and densely punctu- 

 late and lightly longitudinally striolate behind ; scobina 

 absent ; the transverse sulcus is very weak laterally and 

 absent on the dorsal surface, it scarcely ascends, in fact, above 

 tlie pore. The^o?-^ rather small, just behind or almost upon 

 the transverse sulcus, above the middle of the side. Sterna 

 striate. 



Anal tergite produced into an acute or rectangularly angled 

 process, which just covers, without overlapping, the summit 

 of the valves ; valves with rather strongly compressed borders, 

 lightly punctulate ; sternal plate obtusely angled. 



Legs longish, with a single seta on the distal end of the 

 lower surface of each segment. 



(J. — Thinner than the female, with the sixth and seventh 

 segments swollen and the legs longer ; the distal segments of 

 the legs of the third to the seventh pairs interiorly produced. 

 Copulatory apjjaratiis on the same type as that of S. americce- 

 borealis'j the unpaired median lamina with very slender arms, 

 the inferior angle produced into a truncate subcylindrical 

 process projecting between the two halves of the anterior 

 lateral laniinse; the latter short, with straight inner border', 

 and widely but unevenly convex latero-inferior border ; the 

 posterior lateral lamina strongly convex externally, lightly 

 concave internally, with its apex narrowed and bent into a 

 strong hook ; protrusible portion very stout and long, con- 

 sisting of four distinct externally convex and internally 

 hollowed segments, from the second of which there projects 

 inwards a sclerite which ends below in an inwardly directed 

 pointed process, while the distal is pointed, fringed in front 

 with a series of short hairs, and is furnished apically with a 

 short tongue-like process. 



Number of segments in female 50 to 51 and 56 ; in male 

 49 to 53. 



