no 



THE MYRIAEODA OP NORTH AMERICA. 



tops postica (C. postica, kSay), except as to the eyes and teeth. Is it possible that Mr. 

 Newport is mistaken as to the possession of eyes "? Say certainly did not see them. 

 Length II inches. 



llab. North Carolina. — Dr. Win. Stimpson. — Smithsonian Collection. 



Fi B . TO. 



Fig 11. 



0. SPINICAUDA. 



0. aurantiaca; capite polito, punctate; segmento basali depressione magna triangular! mediana; antennis 17 

 artioulatis, antice pubescentibus ; laminis dentalibus, labio mandibulisquo subprofunde punctatis, margine antico 

 rotundato; denticulis labialibus 4, parvia, arete coadunatis, indistinctissimis ; labio medio antice subcarinato; 

 scuto postremo maximo, subprofunde pnnotato, alteris fere bis majore, latcribus rotundatis, marginibus lateralibus 

 valde elevatis ; pedibus postrcmis robustis, supra complanatis, intus complanatis et rude punctatis, articulo basali 

 tibiali fere acquali ; femore, tibia, tarsisque margine interiore superiore acuto et serrulato, femore tibiaquo margine 

 interiore inferiore quoque acuto et serrulato; processu angulari parvo, spina unica robusta acuta ; appendicibus 

 analibus lateralibus angustis, postice truncatis, dense profunde punctatis, singula spina unica apicali minutissima; 

 squama preanali elongata, subprofunde punctata, media leviter canaliculata. (Figs. 8, 9, 10, 11.) 



Orange ; head polished, punctate ; basal segment with a large median triangular depression ; antennas 16 articu- 

 late, distally pubescent ; dental lamina, with the labium and 

 mandibles subprofoundly punctate, anterior margin rounded; 

 labial denticules 4, small, closely coadnate, very indistinct; 

 labium niedianly anteriorly subcarinato ; last scutum very 

 large, subprofoundly punctate, almost twice as large as the 

 others, with its sides rounded, its lateral margins very much 

 elevated; last pair of feet robust, above complanate, within 

 eomplanate and rudely punctate; basal and tibial joints about 

 equal ; interior superior margin of the femur, tibia and tarsi 

 acute and serrulate; the interior inferior margin of the femur 

 and tibia also acute and serrulate; angular process small, with 

 a single acuto robust spine; lateral anal appendages narrow, 



posteriorly truncate, densely profoundly punctate, each with a very minute apical spine; preanal scale elongate, 



subprofoundly punctate, medianly lightly canaliculate. 



0. iswnicauda, Wood, Journ. A. N. S., new series, vol. v, 18G3, p. 3G. 



The color varies greatly in depth of shade, but the two ends arc almost always darker 

 than the intermediate portion of the body; the feet, with the exception of the last pair, 

 are generally lighter. The cephalic segment is slightly emarginatc in front. The suture 

 between the true basilar segment and the prebasilar fold is very deep ; it is formed by two 

 lines rapidly divergent from the centre, and at the central portion there; is quite a large 

 triangular depression. In some specimens the scuto-episcutal sutures arc well-marked. 

 The posterior borders of the scuta are straight. The terminal scutum is nearly twice as large 



