394 Dr. P. P. Carpenter on new Forms of Mollusca 



apex, with the angles acute ; dorsal obtusely truncated. Ante- 

 rior tarsi dilated and fringed. 

 Obydos. 



28. Colobothea forcipata, n. sp. 



C. gracilis, postice valde attenuata, nigra, vertice thoraceque vitta 

 lata communi cinerea ; elytris cinereo nebulosis, relictis plagis 

 lateralibus et vitta lata apicali nigris ; antennis nigris, articulo 6 t0 

 albo annulato ; maris segmento ventrali terminali forcipato. Long. 

 4-5| lin. J • 



Head black, forehead spotless, vertex with a broadish ashy 

 line, which continues along the middle of the thorax, enlarging 

 posteriorly, the rest of the surface of the thorax deep black. 

 Antennas black, sixth joint alone marked with a white ring. 

 Elytra gradually attenuated from base to apex, the latter sinuate- 

 truncate, sutural angle prominent, external spiniform ; surface 

 punctured, setose, and marked with an ashy cloud extending 

 from the scutellum to near the apex, and emitting several irre- 

 gular branches; the apical part is crossed by a broad black 

 vitta, the apex itself being edged, as usual, with white. Body 

 beneath ashy ; sides of thorax and abdomen with a broad yel- 

 lowish vitta. Legs ashy, spotted with black. 



$ . Terminal ventral segment with each side produced into 

 a long, compressed, incurved, horny lobe, the apex of which is 

 obliquely truncated ; dorsal plate obtusely rounded at apex. 



Ega, rare. 



[To be continued.] 



XL. — Diagnoses of new Forms of Mollusca from the West Coast 

 of North America, first collected by Col. E. Jewett. By Philip 

 P. Carpenter, B.A., Ph.D. 



[Concluded from p. 182.] 

 Mangelia variegata. 



M. testa valde attenuata, tenui, parva, pallide carnea, rufo-fusco 

 normaliter bizonata, interdum unizonata, seu zonis interrupts ; 

 vertice nucleoso conspicuo, anfr. uno et dimidio, apice mamillato ; 

 anfr. norm, vi., subrotundatis, suturis valde impressis ; costis 

 radiantibus ix., angustis ; costulis spiralibus crebris, validioribus, 

 in spira circ. x., costas superantibus ; apertura valde elongata; 

 canali brevi, aperto ; labro tenui, juxta suturam conspicue arcuato ; 

 labio tenui. Long. "31, long. spir. *17, lat. *1 poll., div. 22°. 



Variat costis crebrioribus, sculptura minus expressa. 



Hab. Sta. Barbara {Jewett). 



Mangelia (? variegata, var.) nitens. 

 M. testa M. variegatce simili, sed nitentiore, fascia alba et altera 



