240 A Moyiograj)h of Scy>tonotus. 



Lingual lamina more than three times as long as broad, with a few long 

 bristles. Lingual lobes large, somewhat broader than long, truncate 

 distad, 2-3 very small cones at the interior corner. Median lobe clavate, 

 truncate or acuminate at apex, or truncate below and acuminate above ; 

 on either side, near the apex, rises a styliform process, sometimes biden- 

 tate at apex (fig. 52). 



First segment sub-elliptical, more arcuate in front, about twice as 

 broad as long, much narrower than the head or second segment ; surface 

 rough with setiferous granules of varying distinctness, sometimes the 

 central ones are nearly obliterated, sometimes all excejit the posterior row. 



Second segment shortest, about half as long as the first, sub-lunate, the 

 ends longer than the middle, and embracing the first segment ; surface 

 very convex and rough with granules usually without evident regularity 

 of arrangement. 



Subsequent segments gradually longer, the anterior projection of the 

 carinse gradually disappearing, though the anterior corner is prominent 

 on nearly all the segments. Beginning with the fifth the jjosterior angle 

 becomes more and more prominent, especially on pore-bearing segments, 

 and on some of the candal segments takes the form of a triangular pro- 

 jection from the posterior margin. The granules become more regularly 

 arranged in five or six transverse rows ; the furrow in front of the third pos- 

 terior row is usually deeper than the others, and a somewhat pronounced 

 median furrow runs from it to the anterior margin of the subsegment. 



Repugnatoiial pores situated in a slight depression on top of the large 

 smooth sub-elliptical elevation at the corner of posterior segments and 

 nearer the middle of the lateral edge of the anterior. 



Lateral carinas thick, the edges granulate-serrate, smooth below ; the 

 granules usually larger and irregularly arranged. 



Supplementary margin (fig. 58) finely pectinate, the teeth transparent, 

 lance-like, simple or With a small tooth on one side, rarely on both. 



Anterior subsegments densely and minutely punctate ; between the 

 subsegments a somewhat abrupt constriction. 



Last segment the dorsal surface rough with spine-like, setiferous tuber- 

 cles, not arranged with regularity ; conic, decurved, truncate at apex, and 

 with four small pits from each of which rises a long bristle. On each 

 side above the apex is a larger tubercle (fig. 07). 



Anal valves smooth or faintly wrinkled, the margins compressed, 

 elevated, a groove on either side, in which is located two setigerous 

 tubercles, one near the middle, the other near the upper corner. 



Pre-anal scale much broader than long, sub-triangular with the ai)ex 

 broadly truncate or rounded, on each side a tubercle from which rises a 

 long bristle, appressed to the anal valves. 



Color horn-brown, some specimens with a decided tinge of cherry red, 

 others dirty white ; extremities of antenuic and legs colored like the 

 body, sometimes darker and sometimes lighter ; ventral surface and 

 basal joints of legs and antenufe pale. 



Length 12-14 mm.; width 1.5-1.75 mm. 



