130 ACADEMY OF NATURAL SCIENCES 



slightly emarginate near the anterior tip j posterior moiety a little 

 flattened, with an impressed line; posterior tip rounded and hard- 

 ly extending beyond the base of the postpectus : feet dark piceous. 



Length from three-fifths to thirteen-twentieths of an inch. 



This species, which is found equally in Pennsylvania and on 

 the Missouri, is certainly very closely allied to the H. caraboides 

 of Fabr, The venter as [202] well as the postpectus of this 

 species has a silky appearance in a certain light, occasioned by its 

 minute dense hairs. The posterior termination of the body is 

 more obtusely rounded than the head. 



[Belongs to IL/drochares. — Lec] [203] 



3. H. NIMBATUS. — Black; head, thorax and elytra margined 

 with yellowish. 



Inhabits the United States. 



Hydroph. nlmhatus Knoch in Melsh. Catal. 



Head, two diverging punctured lines ; margin yellowish ; la- 

 brum, margin yellowish : palpi and base of the antennae yellow- 

 ish : thorax, a much abbreviated impressed oblique line each 

 side befoi;e the middle, and another rather longer one on the mid- 

 dle of the lateral submargin ; lateral margin and anterior edge 

 yellowi.sh-white : elytra minutely punctured ; lateral margin yel- 

 lowish-white ; beneath black, sericeous with dull yellowish hairs ; 

 feet pale : thighs black at base : tarsi dusky : pectus with a bifid 

 prominence : sternum pale, a little dilated before the intermediate 

 feet ; punctured ; somewhat scabrous near the anterior tip ; be- 

 hind the intermediate feet attenuated, with a slightly impressed 

 line ; posterior tip elongated, acute : venter, terminal segment.^ 

 with a rufous spot each side. 



Length about two-fifths of an inch. 



A very pretty species and not uncommon. 



\^I[i/drophilus lateralis Fab., is an older name of thia species. 

 —Lec] 



SPiERIDIUM Fab. 



S. APiciALis [apicale]. — Obscure, piceous ; head black ; 

 elytra pale at tip. [204] 



Body blackish-piccous, punctured, glabrous, oval : head equal, 

 deep black ; punctures minute, distinct, dense : antenna) picoDus ; 

 '^lava obconical, black; maxillary palpi pale piceous, blackish af 



[Vol. III. 



