1852.] 97 



quite unnatural to separate them. The elytra of the male are truncate at apex, 

 so that the pygidium is visible. 



5. A. formicarius, nigro-piceus, nitidus, parce griseo-setosus, capite 

 punctis paucis impresso, occipite brevissime canaliculato, thorace postice valde 

 constricto, dein subampliato et punctato, elytris grosse parce punctatis, basi 

 indeterminate rufis, impressis, et anguste flavo-fasciatis. Long. -H. 



Ferte, Anthic. 185. 



New York and Massachusetts, usually in salt marshes. The anterior part of 

 the thorax is convex, and sparsely punctured ; the posterior lobe is a little 

 widened towards the base, and is tolerably densely punctured. The base of the 

 antennae and tarsi are testaceous. The punctures of the elytra become small 

 behind the middle. The male has the pygidium prominent. 



6. A. cinctus, rufus nitidus, parce griseo-setosus, thorace postice valde 

 constricto, dein subampliato, et granulato, elytris parce grosse punctatis, nigris 

 basi rufis, fascia pone basin apiceque flavis. Long. "15. 



Say, J. Ac. Nat. Sci. 3, 278 ; Ferte, 274. 



Illinois ; Mr. Willcox. This species is very closely allied to the preceding, 

 but differs in color, and in the sculpture of the posterior lobe of the thorax, 

 which, instead of being punctured, is densely and finely granulate. The punc- 

 tures of the front part of the elytra are also more numerous. The head is 

 marked with a few punctures, and the occiput with a very short impressed line, 

 just as in the last species. The pygidium of the male projects. 



7. A. a n n e c t e n s , nigro-piceus, nitidus, parce pubescens, capite thoraceque 

 vix subtiliter punctulatis, hoc postice constricto, ad basin subtiliter bitubercu- 

 lato, elytris minus subtiliter punctatis, tibiis testaceis. Long. !. 



Lee. An. Lye. 5, 153. 



One specimen, from the sea-shore at San Diego, California. The thorax is 

 longer than wide, much rounded on the sides before the middle, then narrowed, 

 and slightly constricted before the base, which is cylindrical, very finely punc- 

 tured, and distinctly bituberculate. The punctures of the elytra grow small 

 behind the middle. 



8. A. californicus, rufo-piceus, nitidus, parce pubescens, capite tho- 

 raceque punctulatis, hoc postice constricto, vix bituberculato, elytris mirms dense 

 punctatis, macula ad medium apiceque nigro-piceis. Long. !. 



Ferte, Anthic. 128. 



Abundant at San Diego, California, on the sea-shore, and in the marshes. 

 The thorax is more obliquely rounded on the sides before the middle than in the 

 last species ; the tubercles of the base are scarcely visible. The punctures of 

 the head and thorax are very distinct, and those of the latter become very dense 

 towards the base. 



This species varies very much in color. The spots are usually quite unde- 

 fined. I have a specimen with pale yellowish elytra, and the spots very well 

 defined ; the anterior one is placed near the middle, is very large, and extends 

 nearly to the suture. Others occur which are entirely black. The male has 

 the abdomen subtruncate at the apex. 



9. A. reiectus, rufo-piceus, nitidus, parce pubescens, capite thoraceque 

 punctulatis, hoc postice angustato, subconstricto, elytris depressiusculis, sat 

 dense punctatis, ad basin medium et apicem infuscatis. Long. -1. 



New York and ^Missouri Territory, in salt marshes. Rufo-piceous, shining, 

 sparsely pubescent. Head rounded prominent behind, finely not densely punc- 

 tured. Thorax longer than wide, moderately convex, not densely punctured, 

 rounded on the sides anteriorly, obliquely narrowed nearly to the base, where it 

 is slightly constricted, cylindrical portion of the base shorter than in the pre- 

 ceding, densely punctured, with two very obsolete tubercles. Elytra somewhat 

 flattened, twice as wide as the base of the thorax, humeri prominent, sides 

 slightly widened to the middle : strongly moderately densely punctured, punc- 



