178 J. L. LECONTE, M. D. 



These species are found oa the sea-shore under seaweed, cast up by 

 the waves, 



STIL.ICUS Latr. 



Upper surface of head and prothorax densely puactulate 2. 



Upper surface of head and prothorax coarsely punctured 3. 



2. — Head semieircularly rounded behind, nearly smooth beneath; presternum 



finely but strongly carinate; 5.3 — 7 mm.; Penna.; Ariz 1. tristis. 



Head quadrate behind the eyes, hind angles rounded, base emarginate, 

 beneath densely rugosely punctured; prosternura very feebly carinate ; 

 blackish piceous, prainose wiih very fine pubescence; 4.7 mm.; Cai. ; 



Mo.; Mass 2. quadriceps n. sp. 



Head quadrate behind the eyes, base subtruncate, beneath densely rugosely 

 punctured; prosternura feebly carinate; blackish piceous, finely pubes- 

 eent, legs sometimes ferruginous; % fifth ventral with an apical tooth ; 



4 mm.; D. C. ; Tenn.; Gala 3. opaculus n. sp. 



3. — Head and prothorax rugosely punctured above 4. 



Head not rugosely punctured above, sparsely very coarsely punctured be- 

 neath, hind angles and base broadly rounded; prothorax with a broad 

 smooth dorsal stripe; bronze-brown, apical margin of elytra and legs 

 yellow; '^ fifth ventral simple at hind margin; 4 ram.; Pa.; 111.; La.; 



Fla 4. angularis. 



4. — Head beneath shining and very sparsely coarsely punctured ; bronze- 

 brown, apical margin of elytra yellow, legs darker yellow; head and 

 prothorax less shining; 'J, fifth ventral with an apical tooth; 4 mm.; 



Mass.; N, Y. ; Mich 5. deiltatus. 



Head beneath shining and very sparsely punctured ; elytra behind scarcely 

 margined with yellow; legs dark yellow; head and prothorax not shining ; 

 % fifth ventral with two small tubercles on hind margin ; 4 mm. ; Mass. ; 



Mr. F. Blanchard 6. biarenatus n. sp. 



Head behind the eyes longer than wide, sides obliquely rounded; beneath 

 densely rugosely punctured; head and prothorax not shining, apical 

 margin of elytra and legs ferruginous-yellow; '^ fifth ventral with an 

 obsolete apical tooth; 4.4 mm.; Mass.; D. C. ; 111 7. rudis. 



The sixth ventral is emarginate in the S of all these species. 



The species under No. 2, that is, those with finely punctured head 

 and prothorax extend from the Atlantic to the Pacific regions; those 

 with coarse sculpture are found in the Atlantic region only. I there- 

 fore infer that in the preglacial epoch, the former occupied the circum- 

 polar continent, or the western part of North America, while the latter 

 inhabited the south-eastern or subtropical regions. 



SCOP^US Er. 



Besides the three species mentioned in the Crotch Check List, 

 (two of which had been erroneously described by me as Uchiastej-), 

 I have several others, from both sides of the continent, which are 

 easily distinguished, but present no remarkable characters. 



The following species, on account of the singular conformation of 



