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 forcipafa, 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^° 

 albo annulate ; maris segmento ventrali terminali forcipato. Long. 

 4-5| lin. c? . 



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. 

 Antennae 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, pallida carnea, rufo-fusco 

 normaliter bizonata, interdum unizonata, seu zonis interruptis ; 

 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. 'IZ, lat. *] poll., div. 22°. 



Variat costis crebrioribus, sculptura minus expressa. 



Hah. Sta. Barbara {Jeivett). 



Mangelia (? variegata, var.) nitens. 

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



