AMERICAN PHILOSOPHICAL SOCIETY. 557 



face; antennas and palpi honey-yellow, dusky at their tips; tho- 

 rax honey-yellow, anterior margin blackish ; posterior margin 

 dusky ; four large black spots in a transverse series, the twu in- 

 termediate ones nearer together; elytra honey-yellow with minute 

 black points more or less crowded so as to give a dusky, sometimes 

 almost blackish appearance ; lateral margin destitute of black 

 punctures, but with a black line on the posterior curvature ; at 

 base, particularly the humeral base, destitute of the black punc- 

 tures ; three regular series of small black dotii ; beneath black; 

 [443] pectus, feet and epipleura yellowish. 



Length over two-fifths of an inch. 



Taken in the river beyond Vera Cruz. 



It is about the size of the C. adspcrsits ¥., which it consider- 

 ably resembles, if we except the thoracic black dots. 



3. C. FENESTRALis Say, Trans. Amer. Philos. Soc. — Since de. 

 scribed by Germar under the name of hiffuttulus Sp. Insect, p. 

 29. ' 



4. C. INTERROOATUS Fabr., Syst. Eleut. C. venustus Say, 

 Trans. Amer. Philos. Soc. — When describing this species I stated 

 that it " may probably prove to be the intcrroijafiisof Fabricius." 

 Of this I have now so little doubt, that I venture to reject the 

 name I then provisionally gave, and to adopt the true or ante- 

 rior name. Dejean is also of the opinion that it is the intcrroga- 

 tus F. Sturm, however, considers it distinct. 



[Ante, 512. Belongs to Coptotumus. — Leg.] 



COPTOTOMUS Say. 



Tarsi distinctly five-jointed ; basal joints of the anterior pair 

 of the male subequally dilated or gradually tapering; posterior 

 nails pressed together and apparently single ; posterior feet 

 natatory, base of the thighs naked ; antennae eleven-jointed, 

 at least as long as the head and thorax, filiform; seutel distinct; 

 terminal joint of the palpi somewhat compressed at tip and cmar- 

 ginate. 



Ois. This genus differs from other genera of this family in 

 the character of the emarginate palpi, excepting the genus Xotc- 

 riis, which is destitute of an apparent seutel and the euiargina- 

 1834.] 



