ELAPHRIME. 61 



(87) 1. * Opisthius Richardsoni. Richardson s Opisthius. 



O. [Richardsoni] subobscurus; subtus niger ; subpilosus, supra nigro-aneus ,■ elytris dilatatis planis, foveolarum levium seriebus 



quatuor ; tibiis obscure rufis. 

 Richardson's Opisthius, gloss rather obscured; black underneath and somewhat hairy; above black-bronzed ; elytra flat, 



dilated, with four rows of slight impressions ; tibiae obscurely rufous. 



PLATE I, FIG. 9. 



Length of the body 4^) 



Breadth of the prothorax 1 \ lines 



elytra taken together 2| ) 



Mr. Drummond, from my description of this curious insect, thinks it was taken 

 in May, 1825, on an island of Lake Winnipeg, frequenting moist muddy places 

 from which the water had shrunk. 



DESCRIPTION. 



Body with the gloss obscured ; underneath black, somewhat hairy, above a little bronzed. An- 

 tennae nearly half the length of the body, four first joints greenish-bronzed, the rest deep blue : 

 front with a slight impression between the antenna; and a few scattered short whitish hairs : protho- 

 rax very short, more bronzed, transversely very minutely wrinkled : elytra with three rows of oblong 

 greenish very slight impressions, each with a central oblong elevation, with another levigated one 

 between each ; adjoining the lateral margin is a fourth series of greenish-bronzed more numerous 

 impressions without any central or intermediate elevations : thighs green-bronzed, tibia; obscurely 

 rufous, tarsi black, legs hairy. 



XXX. Genus ELAPHRUS. Fab. 



(88) 1. * Elaphrus Clairvillii. Clairvilles Elaphrus. 



E. ( Clairvillii J viridi'Oneus, supra punclulis induratis irroratus : elytris foveis annulatis cceruleis punctatis quadruplici serie ,- 



fronte inter oculos foveola impressa ; femoribus virdibus. 

 Clairville's Elaphrus, green-bronzed, above sprinkled with minute gilded punctures ; elytra with annulated, blue, punctured 

 impressions in a quadruple series : thighs green. 



Elaphrus riparius. Say. Amer, Trans, ii, 80? 



PLATE I, FIG. 8. 



Length of the body 4 lines. 



A single specimen taken in the journey from New York to Cumberland-honse. 



