EHOBUS. 337 



long as the body. Thorax stout, often \\ith apical uotauli; meta- 

 thorax semiglobose, with circular spiracles ; areola and petiolar 

 area often confluent. Scutellum a little elevated and often pale. 

 Abdomen elongate-subfusiform, shortly pilose and distinctly petio- 

 late ; basal segment straiglit, convex, constricted before the almost 

 antemedial spiracles, with the postpetiole gradually a little dilated 

 to apex, and the discal sulcus usually distinct ; second and third 

 segments subequal in length ; terebra stout and not concealed. 

 Legs normal, with the hind femora subincrassate ; tarsal ela\^ s 

 very distinctly, usually elongately and coarsely pecrinate. Areolet 

 usually entire, radial cell lanceolate, nervellus intercepted above, 

 in or below its centre. 



lianr/e. United States, North-West Europe, Ceylon. 



This genus is so closely allied to Ctenopelma that it is doubtful 

 if it has a right to any separate existence, since the impressed 

 clypeus appears but a poor distinction. However, it is now 

 generally recognised on the Continent and consequently is adopted 

 here, though some doubt must be entertained respecting the pro- 

 priety of including in it Cameron's species, since it has the 

 terebra nearly one-fourth the length of the whole body (which 

 feature appears to ally it more closely with the Ophionix.e) and 

 he himself says that it " is probably not a typical Jthorus, but 

 there is no other genus into which I can make it enter." Un- 

 fortunately, I can throw no light upon its position, as I have seen 

 no Oriental species of the genus, which is characterised by having 

 the clypeus neither distinctly discrete nor apically impressed, the 

 tarsal claws closely and elongately pectinate, and the abdomen 

 distinctly petiolate. 



240. Rhorus spinipes, Cam. 



Ithorus spinipes, Cameron, Spolia Zeylanica, 1905, p. 1.32 (5). 



5 . A smooth and shining black species, with profuse flavescent 

 markings. Head with face, cheeks, mandibles, internal orbits, aiid 

 apex of clypeus, flavous. Antennce longer than the body, with 

 the flagellum piceous, and scape with a Havous marking, beneath. 

 Thorax black, witli a mark (triangularly dilated apically) on either 

 side of the mesonotum, another subcircular one at base of meso- 

 pleurce, a larger triangular one at their apex, callosities beneath 

 the hind wings, apices of the obscurely and transversely striate 

 metaiiotum, flavous ; metanoium longitudinally sulcate throughout 

 the basal half of its disc. Scutellum flavous. Abdomen smooth 

 and nitidulous, shortly and densely pilose, with the apices of all its 

 segments flavous. Ler/s flavescent ; hind legs with the trochanters 

 mainly, their coxae beneath, and the tarsi, black ; the femora 

 rufesc-nt, and the tibia? ferruginous, becoming apicallv blackish ; 

 posterior tibia) and tarsi densely spinose. IVinr/s hyaline, with 

 the stigma infuscate ; areolet obliquely triangular and shortly 



Z 



