322 PROCEEDINGS OP THE ACADEMY OF 



I. Scutellum distinctum ; antennae clavatae : 



Tibiae haud spinulosae. 



Tarsi postici articulo primo elongato ; oculi emarginati, Scaphidium. 



Tarsi postici articulo primo vix longiore ; oculi integri, Scaphium. 

 Tibiae spinulosae ; oculi integri, tarsi postici articulo 



lmo elongato, Cyparium. 



II. Scutellum thoracis basi obtectum ; antennae capillares : 



Coxae posticas late distantes : 



Antennae articulis tribus ultimis latioribus, B^ooeka. 



Antennae articulis 5 ultimis latioribus, Scaphisoma. 



Coxae post, approximatae ; (corpus angustum, compressum) Toxidium. 



Scaphidium Oliv. 



1. S. obliteratum, nigrum, nitidum, elytris gutta utrinque antica 

 externa, alteraque subapicali transversa lunata, parvis testaceis, stria suturali 

 profunde punctata basi arcuata, striis dorsalibus nullis. Long. -21. 



One specimen found near Evansville, Indiana. Larger than the other 

 species, and readily distinguished by the absence of the short rows of punc- 

 tures on the elytra, and by the small size of the elytral spots, which are yel- 

 lowish. 



2. S. 4-guttatum, nigrum, nitidum, elytris macula magna pone basin, 

 alteraque ante apicali lunata rubris, stria suturali profunde punctata basi arcu- 

 ata, seriebus parce punctatis internis ante medium notatis. Long. -16 "18. 



Say, Journ. Acad. Nat. Sci. Philada., 3, 198. 



Middle and Southern States and Kansas. I am very much inclined to con- 

 sider this and the next two species as varieties ; there is no difference in form 

 or sculpture, but only in the spots of the elytra. 



3. S. 4-p ustu latum, nigrum nitidum, elytris macula lunata mediocri 

 pone basin, alteraque ante apicali rubris, elytris stria suturali profunde punc- 

 tata basi arcuata, seriebus tribus parce punctatis internis ante medium notatis. 

 Long. *18. 



Say, Journ. Acad. Nat. Sci. Philad. 3, 198. 



One specimen, New York. The elytral spots are much smaller than the 

 preceding, and both are transverse and lunate. 



4. S. piceum, nigrum, nitidum, elytris immaculatis, stria suturali pro- 

 funde punctata basi arcuata seriebus tribus parce punctatis internis ante 

 medium notatis. Long. -18. 



Melsheimer, Proc. Acad. Nat. Sci. 2, 103. 

 Scaphidium 4-guttatum var. Say, Journ. Acad. Nat. Sci. 3, 198. 

 Middle and Southern States. In all these species the posterior tibue of the 

 males are pubescent internally. 



Scaphium Kirby. 



1. S. castanipes Kirby, Fauna Bor. Am. 4, 108, tab. 5, f. 1. 

 Canada. Unknown to me. 



Cyparium Er. 



1. C. flavipes, (sub-ovale, convexum, nigro-piceum) nitidum, elytris 

 stria suturali punctata, basi breviter arcuata, seriebus utrinque 5 punctatis, 

 interna fere integra, externis antice valde abbreviatis, humeris testaceo-tinctis, 

 antennis piceis, basi ore pedibusque testaceis. Long. -10. 



Southern States. Of the form of a large Scaphisoma : the last five joints of 

 the antennae form an elongate club, and the tibiae, especially the middle ones, 

 have a few spines, small but distinct. The thorax lias no basal punctures, 

 the sides are oblique and broadly rounded. 



[July, 



