149 
joint is large, and one of its margins is provided with a row of very short setiform processes. 
Trunk-legs seem to be altogether wanting. 
THE MALES. They are always distinguished by a very peculiar — though mutually 
extremely varying — development of the frontal border, the margin of which is in a great 
measure decorated with numerous fine, or exceedingly small, spiniform processes, which are 
mostly arranged in a single line. Trunk-legs and caudal stylets either tolerably small, or 
— frequently — altogether wanting. 
OVISACS. They are middle-sized or pretty small, but exceptionally numerous, for 
in three of the species occurred about twenty, in a fourth even twenty-eight sacs, which 
decidedly had been laid by the same female. 
THE LARVA. The front is decorated, either with some good-sized lists, mutually 
connected on each side, or (mostly) with numerous fine processes, arranged in one or more 
rows. Each maxillula has four branches. The basal joint of the maxilla has a double comb 
of fine, almost cylindrical, apically rounded processes along the margin, against which the 
second joint is folded (pl. VIII, fig. 30); the third joint has two or more pointed processes 
along its inner margin. The second joint of the maxillipeds much shorter than the third. 
Abdomen of medium length, or (mostly) tolerably long and powerful; first segment good- 
sized, and the sete proceeding from its posterior angle extending to, or somewhat beyond, 
the caudal stylets; second segment about as long as or a little longer than the first one 
and a little more voluminous; third segment very short, and the caudal stylets set off by a 
distinct articulation. 
1. Conspectus of the Females. 
Maxalleemwelladevelopedts aux cat. cnet, 6) rs, Gut) eyo cele sree ae pee uctel yee econ eos ee 
, Wewallles Cus miGlinngMmehAve Gaon Goeco0eud0050 04 .. 31. S. marginata n. sp. 
2. An odd, good-sized, vaulted eminence, provided with a prominent median plate, a little 
behind and inside the base of the maxillipeds............. 27. 8S. decorata n.sp. 
2’. No eminence behind the maxillipeds ...... ear ee en a heer on eas oar tS 3 
3. The head weil defined from the trunk, with frontal border and lateral borders well 
developed. Caudal stylets well developed............... 28. S. modesta n. sp. 
3’. The head not defined from the trunk, frontal border and lateral borders wanting. No 
Gam dal StyleUsier pt pecan Orn cti testes, ete, chiar oie ais uy ay ee amet eames 4 
4. The solid chitine of the genital area surrounds the genital apertures posteriorly and 
lbneerelin, MO BimIOUhy, coco cous buoueeoooouuedoneg as 29. S. dispar sp. 
4’. The solid chitine of the genital area surrounds the genital apertures on all sides. 
30, S. msignis n.sp. 
2. Conspectus of the Males. 
(Peele DNkel COS NTeSON time serane a Aes thas oye ae op ees uaeiek ay Toau es ay rk olan well ap eobiat cat ees 2 
1’. Trunk-legs (and caudal stylets) wanting altogether ...... Pid tem sua te aionuterr ay yd 3 
