100 [October, 1844- 



Brassy: head brassy-greenish, obsoletely trituberculate between the eyes, 

 punctured, punctures profound and distant on the cranium, confluent and 

 rugose on the clypeus : thorax subcordate, greenish-brassy, strongly and rugosely 

 punctured, slightly convex on the middle of the anterior margin ; a broad, 

 shallow indentation on the disk: scutel minute, orbiculate : elytra subovate, 

 widest behind the middle; brassy-brown, strongly striate-punctate; each elytrum 

 with three elevations, of which the two first are short, and linear, the third or 

 posterior one is located before the declivity of the elytrum, and is oblique, linear, 

 and studded with four or five small tubercles : beneath brown : feet dusky 

 green-brassy ; tarsi dull testaceous. This species is strictly no Hi/drochus, 

 neither can it with propriety be referred to any other of the present constructed 

 genera of Helophoridas. 



2. H. rufipes. B rassy -brown ; feet rufo-testaceous. — l^ 1. long. Pennsyl- 

 vania. 



Elophorus rufipes, Melsh. Catal. 



Body elongate, brassy-pale brown above: head dark, roughly punctured; 

 the clypeus at tip truncate : thorax quadrate, slightly widest at apex, with the 

 middle of the anterior margin feebly prolonged ; surface somewhat inequal, 

 roughly punctured : elytra strongly crenate-striate, the interstices fine, elevated, 

 second, third and fourth lines with interruptions in the middle ; suture dull ru- 

 fous : beneath reddish-brown : feet rufo-testaceous ; knees dusky. The elytra 

 in some specimens are reddish-brown. 



Hydrophilidae, MacL. 



Berosus, Leach. 



B. auritus. Lurid-testaceous ; head biimpressed, brilliant cupreous. — Is I. 

 long. Pennsylvania. 



Hydrophilus auritus, Melsh. Catal. 



peregrinus, Hbst. Col. VII. p. 314. 27 7 



Size and form of H. luridus, Linn. Body lurid-testaceous : head brilliant 

 cupreous, densely and deeply punctured, each side between the eyes, with a 

 longitudinal impression which is bounded before by a transverse impressed line ; 

 lateral and anterior edges of the clypeus black : antenna?, labrum and palpi, 

 testaceous : thorax less densely and obviously punctured than the head, with a 

 somewhat obsolete green-brassy spot behind the middle of the anterior margin : 

 elytra crenate-striate, sparsely maculate with dusky : beneath and feet testa- 

 ceous. Though Herbst's character, " between the eyes are two large flat tuber- 

 cles, which have a bluish reflection," is absent in the present species, it may 

 nevertheless be peregrinus. 



Laccobius, Erichson. 



L. pundatus. Lurid ; head and thorax black, with the lateral margins of 

 the latter testaceous. — 1^ 1. long. Pennsylvania. 



Head minutely and densely punctured, black, shining; each side before the 

 eyes, antenna and palpi testaceous : thorax blackish, glossy, with the lateral 

 margins and posterior angles broadly pale testaceous ; punctured like the head : 

 scutel black, with sparse punctures : elytra lurid, finely and obtusely punctate- 



