Mr. Kirsy’s Century of Insects. 451 
 drico, intus aculeato: aculeis pluribus setiformibus mobili- 
bus, ultimo subovato intus aculeato, apice unguiculato: un- 
gueincurvo. Thorax suborbiculatus: lateribus marginatis in- 
crassatis. Pedes octo: coxis sex anterioribus arcuatis basi 
subcoalitis, intermediis longioribus, posticis duobus maximis 
cum postpectore coalitis et vix linea impressa separatis, extror- 
sum rotundatis, supra apice spina valida armatis, trochanteri- 
bus brevibus cylindricis, femoribus cylindricis: posterioribus 
spinosis genubus convergentibus, tibiis triarticulatis: articulo 
primo brevi incrassato campanulato, secundo tenuiori longiori 
cylindrico, tertio gracili longo filiformi apice bicalearato, tarsis 
filiformibus pilosis: anticis sexarticulatis, antepenultimis sep- 
tem- vel undecim-articulatis, penultimis brevioribus sex- vel 
septem-articulatis, posticis octo-articulatis: articulo primo ob- 
soletiusculo, secundo reliquis longiori, penultimo brevissimo. 
Tarsi omnes unguiculati, sed in quatuor anterioribus unguicu- 
lus internus obsoletus. Sternum inter pedes sex anteriores an- 
gustissimum, subcuneiforme. Poststernum inter coxas posticas 
et ab eis linea impressa levi separatum, fere sagittatum, postice 
utrinque spiraculo lunari pertusum. Abdomen brevissimum, 
interdum retractum, segmentis brevissimis et quasi plicatis, 
dorsalibus quatuors ventralibus sex, analibus mame bu: 
- This genus belongs to Latreille’s Arachnides Trachéennes Hole- 
tres, and should come before Phalangium, to which it is nearly re- 
lated. It is sufficiently distinguished from that genus by its tri- 
angular body, immense posterior coxa 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 joints in any of its tarsi. The third joint of the tibiæ may 
by some perhaps be regarded as the first joint of the tarsus, but 
VOL. XII. 3N the 
