NATURAL SCIENCES OF PHILADELPHIA. 41 



Middle and Western States. Centrodera is readily distinguished among our 

 Lepturide genera by the large coarsely granulated eyes. This species differs 

 from the other two by the lateral tubercle of the thorax not being acute, and 

 by the 3d and 4th joints of the antennae being shorter. 



12. Toxotus Schaumii Lee. 



The males of this species are frequently reddish yellow, with only the elytra 

 and antenna? black; the first joint of the antennae is yellow and the tarsi are 

 fuscous. 



Pyrotkichus. (Lepturini.) 



Corpus elongatum lineare ; caput longe pone oculos subito constrictum, 

 f route brevi verticali ; oculi valde emarginati, subtiliter granulati ; palpi 

 articulo ultimo modice dilatato, campanulato. Thorax tuberculo acuto late- 

 rali armatus ; elytra elongata parallela, praecipue postice fortiter marginata. 

 Antennae (maris) erassiusculse, corpore paulo breviores, articulis 3io et 4to 

 conjunctis 5to haud longioribus. Pedes mediocres, postici paulo longiores, 

 tibiis calcaribus ad apicem sitis, tarsis posticis articulo lmo sequentes duos 

 aequante. 



This genus is allied to Encyclops. but differs in the proportion of the joints 

 of the antennae, and also by the deeply emarginate eyes. 



13. P. v i 1 1 i c o 1 1 i s , niger, opacus, capite scutello vittisque tribus thoracis 

 laate fulvo-pubescentibus ; elytris rude punctatis, thorace parum latioribus, 

 margine postice et ad apicem reflexo. Long. '48. 



California ; Mr. Ulke. In each of the large punctures of the elytra is con- 

 tained a very minute brown hair; the tip is feebly truncate. 



14. Elaphidion subpubescens, elongatum lineare, pube parca pallida 

 vestitum, testaceum, capite thoraceque fuscis, hoc cylindrico, latitudine longiore, 

 rude sat dense punctatum, elytris parce antice fortiter punctatis, apice truncatis 

 bispinosis ; femoribus muticis, antennis articulis 35 spina brevi apicali arraa- 

 tis. Long. -65. 



New Jersey; Mr. P. R. Uhler. Very different from our other species, and 

 still more slender than E. parallelum. 



15. Heterachthes nobilis, elongatus piceus, nitidus, pilis pallidis erectis 

 parce vestitus, thorace latitudine sesqui longiore rude rugose punctato, antice 

 posticeque transversim impresso, elytris parce fortiter punctatis, fascia trans- 

 versa ad suturara interrupta ante medium, alteraque communi antice angulata 

 pone medium pallidis ornatis. Long. -50. 



Texas. Resembles in appearauce H. 4-m aculatis, but very different by 

 its sculpture and the very distinct chevron-shaped band of the elytra. 



16. Stenosphenusl u g e n s, niger, thorace latitudine sublongiore, antrorsum 

 angustato, lateribus rotundatis, nitido laevi, elytris vitta suturali angusta, 

 alterisque utrinque duabus fere confluentibus punctatis et parce pubescentibus 

 apice bispinosis. Long. -50. 



Texas. Narrower than S. notatus; the elytra have the punctures arranged 

 in three longitudinal bands ; a narrow one at the suture, and two almost con- 

 fluent on the disc ; from the punctures proceed coarse pale hairs ; the inter- 

 vening spaces are smooth and glabrous. The spines of the antennae are as in 

 S. notatus. The feet are entirely black. 



Oxoplus. 



Corpus elongatum, haud convexum subtiliter parce pubescens, grosse punc- 

 tatum ; mandibular apice late emarginatae ; antennae sexus utriusque 11-articu- 

 latae ; oculi subtiliter granulati; thorax transversus, lateribus spina acuta 

 armatus, dorso vix callosus ; elytra apice subtruncata haud spinosa. 



A new genus, allied to Tylosis, but differing by the antennae having eleven 



1862] 



