OP PHILADELPHIA. 339 



[This is D. sulckolUs Lac, which name must be adopted, as 

 there is a D. mctallica previously described by Ahrens. — Leg.] 



3. D. RUFA. — Dull metallic rufous; front destitute of lateral 

 impressed lines. 



Body totally dull rufous, with a metallic gloss, particularly on 

 the elytra : head dusky, almost opaque, with much crowded, very 

 small punctures ; no appearance [284] of tubercles; a very dis- 

 tinct, impressed frontal line extending down between the an- 

 tennae ; no appearance of impressed lines near the eyes : antennae 

 somewhat paler than the body, and about half the length of the 

 body; third joint distinctly longer than the second: thorax 

 longer than broad, minutely punctured ; longitudinal line very 

 distinct, deeply impressed ; a transverse impressed line on the 

 posterior submargin ; lateral tubercles rather prominent, obtuse ; 

 tubercle of the anterior angle distinct from the large tubercle, 

 acute : elytra hardly obviously inequal near the suture ; with 

 strise of punctures; tip decurved, almost truncated, or obtusely 

 rounded : beneath, in a particular light, dull silvery sericeous : 

 feet rufous. 



Length more than three tenths of an inch. 



I found this species in company with pahnata, on the bank ot 

 the Schuylkill river. 



[Continuation from Vol. 5, 1826, pp. 293—304.} 



4. D. PUSiLLA. — Green ; elytra brassy ; tibise and tarsi rufous; 

 second and third joints of the antennae equal. 



Head brassy-green, very densely and confluently punctured ; a 

 well impressed frontal line; lateral lines none ; no appearance of 

 frontal tubercles : antennre short, much less than half the length 

 of the body; second and third joints equal, fourth joint hardly 

 longer; joints dull rufous, blackish at tip : thorax green, a little 

 tinged with brassy, longer than broad, as densely punctured as 

 the head ; middle of the anterior edge a little elevated : longi- 

 tudinal line none; lateral tubercles obvious: elytra brassy-green, 

 a little tinged with cupreous; with striae of punctures; three lon- 

 1826.] 



