Platvxin^ 53 



reflexed at base. The elytra have three dorsal punctures, which 

 are not fine as in the other sections but large, broadly impressed 

 and foveiform. The met-episterna are moderately elongate. The 

 three species known at present are the following: 



Form rather stout, oblong, somewhat convex, highly' polished and with 

 bright greenish-aeneous lustre throughout above; under surface 

 greenish-black, the legs testaceous, with blackish knees; head 

 slightly elongate, with large and prominent eyes, three-fourths as 

 wide as the prothorax, the anterior impressions fine, parallel, 

 diverging posteriorly; palpi slender, piceo-rufous; antennae slender, 

 blackish, with pale basal joint, three-fifths as long as the body, the 

 third and fourth joints equal; prothorax fully one-half wider than 

 long, parallel, the sides broadly, subevenly rounded, feebly so 

 basally, the angles very obtuse but with the tips minutely sub- 

 prominent and bluntly subdenticulate; surface with a few feeble 

 transverse rugulae, fine anterior impression and very fine subentire 

 stria, the foveae large, concave, rugose and not anteriorly pro- 

 longed; margins very finely reflexed; base arcuate, the apex scarcely 

 so wide and feebly sinuate; elytra barely more than a third longer 

 than wide, four-fifths wider than the prothorax, oblong, with nearly 

 straight sides, rapidly rounding at the humeri, broadly rounding at 

 apex from a little behind the middle, the sinus short, shallow but 

 evident; striae very fine, grooved, very minutely but evidently 

 punctulate, the punctures minutely crenulating the flat intervals 

 and not very close-set; met-episterna nearly twice as long as wide; 

 anterior male tarsi feebly dilated, the joints smooth above; hind 

 tarsi long and slender, very nearly as long as the tibiae. Length 

 (cf 9 ) 6.7-7.0 mm.; width 2.5-2.75 mm. New Jersey and Massa- 

 chusetts. [Agonutn excavatiim Dej.] excavatus Dej. 



Form nearly similar and equally convex, slightly more elongate and a 

 little larger in size, shining throughout, cupreo-aeneous above, the 

 under surface greenish-black, the legs dark rufous; head fully 

 three-fourths as wide as the prothorax, rather elongate, the eyes not 

 so large but still more prominent than in the preceding, the parts 

 before the eyes more prolonged; antennae nearly similar; prothorax 

 larger, fully a fourth wider than long, widest slightly before the 

 middle but with the sides subevenly, moderately arcuate through- 

 out and finely reflexed; angles obtuse, with the tips well defined 

 though rather less sharply than in excavatus; base wider than the 

 distinctly sinuate apex; surface nearly similar, with feeble impres- 

 sions, the postero-lateral area densely, subrugosely and somewhat 

 finely punctate, the foveae different, being more elongate and linear 

 and more sharply and deeply impressed, the surface thence to the 

 sides slightly convex; elytra one-half longer than wide, fully four- 

 fifths wider than the prothorax, in outline, and in the subposterior 

 discal indentation, as in the preceding, the striae much less fine, 

 abruptly grooved, with punctures which are similarly very fine; 

 intervals feebly convex, the three foveae of the third not half as 



