168 Annals Entomological Society of America  [Vol. V, 
the caudal nearly straight, both margined, more strongly so ventrad 
over lateral portions. Two deep longitudinal striz across plate dorsad 
of lateral margin on each side. 
Segments deeply striate beneath and on lower sides, the striz on 
some anterior segments extending dorsad nearly to the black spot. 
Repugnatorial pores moderate, well separated from the transverse 
‘suture which at this level is very weakly curved, remaining almost 
straight. 
Anal scutum with apical process straight, acute, not at all decurved, 
somewhat exceeding the anal valves; bearing four sete along each 
caudo-lateral margin. (See Pl. XII, figs. 6 and 7). 
Anal valves with mesal margins elevated, the elevated ridge crossed 
by a series of transverse sulci; each vale widely depressed caudad of and 
not quite parallel with the margins of anal scale. Each valve bearing 
two sete ectad of elevated mesal border, one at about one-third the 
-distance from each end. (See Pl. XII, fig. 6). 
Anal scale with caudal margin subsemi-circular, the lateral angles 
a little extended; anterior margin widely convex. A little cephalad of 
caudal margin two pairs of setee borne on tubercles. (See Pl. XII, fig. 5). 
Appendages of the second segment in female consisting of a plate 
presenting on each side a caudo-ventrally directed lobe which in lateral 
aspect appears clavate and is densely covered with bristles. Springing 
from the anterior portion of segment between the folds of plate is a pair 
of very small leg-like appendages distinctly jointed and terminating in 
a straight transparent claw; these appendages strongly suggestive of 
Ronee with the anterior ‘pair of ordinarily ambulatory appendages 
of other segments. (See Pl. XII, fig. 8, a drawing from lateral and 
somewhat anterior direction of a specimen in which the first segment 
has been partly separated from the second the better to expose the parts; 
a leg of first Scemient is shown at left.) 
Segments 52. 
Length ad 31 mm.; width 2.2 mm. (female). 
Locality: Tolland) Col. ee 8,000 ft.). Two female 
specimens collected by Prof. Cockerell in Aug., 1911. 
Family PoLYDESMID. 
Genus Polydesmus 
Polydesmus bonikus sp. nov. 
Dorsum appearing dark brown from a close network of dark reddish 
brown lines over a ground of light brown; prozonites light brown; a black 
median dorsal line which is most distinct posteriorly. Head mostly 
light brown, mandibles and lateral portions palest, median portion 
covered with areolation of dark brown lines, a dark reddish brown band 
across region dorsad of level of antenna, and extending ventral in 
tongue-like form between the latter. Antenne light. Venter yellow- 
ish, with some parts tinged with pink. Legs yellow, commonly tinged 
with pinkish distad. 
Body with sides almost parallel for most of length, attenuated 
anteriorly and the last few segments also attenuated in the usual way. 
