"^'miy'] PKOCEEDINGS OF THE NATIONAL MUSEUM. 705 



J?edigeiou« Imniiui* punctate aieolate, uot transversely striate. 



Last segment carinate on the median line above, eompletely closed 

 belo^y. 



Anal valves carinate near the margins, the cariniv produced above 

 into a larger or smaller subcouic, pointed mucro. 



Legs O-jointed, the tlrst Joint short, tlie others subequal, with the 

 fourth slightly longest; males with membranous cushions on the ven- 

 tral face of the fourth and tifth Joints; cushiims wanting on the tirst 

 live and last two pairs; seven pairs in front of the genitalia, first three 

 pairs with pedigerous lamiiuv free. 



First pair of legs of males o-Jointed, the basal Joint with a large 

 curved process directed cephalo-laterad. 



(ienitalia of male with the Hiigellum expanded and lamellate. 



Segments 54-09, length o0-8nmi, 



DiSTUiBUTioN: The species typical of the above genus has been 

 found only at St. Paul de Loanda, but several other species, probably 

 congeneric, are known from Oaffraria, so that the genus will probably 

 be found throughout southern Africa, 



This genus differs from S2Jiro.strei)ti(.s in the nine pectinate lamellae, 

 the shape of the nientum and promentum, the pectinate supplementary 

 margin, the reijugnatorial pores wanting on the penultimate segment, 

 the membranous cushion of the two penultimate Joints of the male legs, 

 and the lamellate tlagellum of the male genitalia. How far any indi- 

 vidual character will prove to be diagnostic of the genus can not, of 

 course, be inferred, but size, shape, habit, and coloration enforce the 

 opinion that the present is a new generic type. 



From the species of SpivoHtreptus. subgenus Nodopyge, the spinal 

 anal valves are a distinguishing feature. Whether the two subgenera 

 of Spirostreptus ought not to be given generic rank, remains to be 

 determined; the spined anal valves, if a constant character, should be 

 given, it would seem, as much weight as the additional pore of Alloporus. 



Ctenoiulus chatelainei, sj). uov. 



Odontopyfie fiocata (Kaiscli). Ann. X. V. Acad. 8(i., viii, 36, I'l. iii. Figs. 24-28. not 

 Spirosireptus (Odoniopj/qe) furcaitis Karsch, n«nic .Tnliileu des J5erliner Mnseiun, 

 p. 22. 



Body of males slightly constricted behind the head. 



Covered portion of epicranium with two well-pronounced transverse 

 striations, the si)ace between which is finely striate longitudinally. 



Vertex smooth or very finely striate longitudinally: sulcus obsolete, 

 but the suture distinct, as well as the transverse iutra-ocular suture 

 which it Joins, 



Clypeus smooth, sometimes with a large shallow depression below the 

 middle; upper row of 5-8 i)unctations, lower row of 16-20; each of the 

 punctations has a bristle, some of which are .12.") mm. long. 



1^'yes pointed o^■al, distant from each other by mo;e tjian the trans- 

 Proc. N. M. 93 45 



