Mr. Kirby's Centimj of Insects. 451 



drico, intus aculeate: aculeis pluribus setiformibus niobili- 

 bus, ultimo subovato intus aculeato, apicc unguiculato: un- 

 gue incurvo. Thorax suborbiculatus : lateribus marginatis in- 

 crassatis. Pecks octo : coxis sex antcrioribus arcuatis basi 

 subcoalitis, intermediis longioribus, posticis duobus maximis 

 cum postpectore coalitiset vix linea impressa separatis, extror- 

 sum rotundatis, supra apice spina valida armatis, trochanteri- 

 bus brevibus cjlindricis, femoribus cylindricis: posterioribus 

 spmosis genubus convergentibus, tibiis triarticulatis : articulo 

 pnmo brevi incrassato campanulato, secundo tenuiori longiori 

 cylindrico, tertio gracili longo filiformi apice bicalcarato, ttrsis 

 fihformibus pilosis: anticis sexarticulatis, antepenultimis sep- 

 tem- vel undecim-articulatis, penultimis brevioribus sex- vel 

 septera-articulatis, posticis octo-articulatis : articulo primo ob- 

 soletiusculo, secundo reliquis longiori, penultimo brevissimo. 

 Tarsi omnes unguiculati, sed in quatuor antcrioribus unguicu- 

 lus internus obsoletus. Sternum inter pedes sex anteriores an- 

 gustissimum, subcuneiforme. Poststcrnum inter coxas posticas 

 et ab eis linea impressa levi separatum, fere sagittatum, postice 

 utrinque spiraculo lunari pertusum. Abdomen brevissimuni, 

 interdum retractum, segmentis brevissimis et quasi plicatis,' 

 dorsalibus quatuor, ventralibus sex, analibus majoribus. 



This genus belongs to Latreillc's Arachnides Traclihnnes IIoU- 

 ires, and should come before Plialangium, to which it is nearly re- 

 lated. It is sufficiently distinguished from that genus by its tri- 

 angular body, immense posterior coxae coalite with the postpec- 

 tus and scarcely separated from it, except anteriorly, even by an 

 impressed line; and more particularly by not having more than 

 eleven jomts m any of its tarsi. The third joint of the tibi^ may 

 by some perhaps be regarded as the first joint of the tarsus, but 



VOL. XII. 3 ^ ^^^ 



