AMERICAN COLEOPTERA. 157 



are usually piceous, sometimes testaceous. A. angustata Schz. is merely 

 a narrower race of bright surface color, similar forms are found by 

 Mr. Ulke near Washington. 



Occurs from New York to Florida. 



A. siiliiata Say. — Piceous, moderately shining, without metallic lustre. Head 

 sparsely punctate, a few wrinkles at side of front. Antennse rufo-testaceous. 

 Thorax ahout one-third wider than long, sides moderately arcuate, very slightly 

 sinuate in front of the basal angles which are distinct but not prominent, margin 

 extremely narrowly reflexed, disc moderately convex, median line entire, sub- 

 apical line feeble, surface shining, sparsely punctate, more densely near the apex. 

 Elytra oblong-oval, surface with distinctly impressed, finely punctured strise, the 

 intervals slightly convex, very finely alutaceous, the dorsal punctures on the third 

 interval nearer the second stria, the anterior in front of middle, color piceous with 

 a pale humeral space and a subapical testaceous fascia. Body beneath piceous, pro- 

 sternum at middle and metasternum at sides sparsely punctate. Legs testaceous. 

 Length .28 inch ; 7 mm. 



Sexual characters as in lucidula. 



The elytra have at the humerus a pale testaceous space which 

 begins on the fifth interval and reaches the side, extending one-third 

 the length of the elytra and along the extreme margin to the middle. 

 The subapical fascia is sinuous and does not reach the side margin 

 nor the suture. 



Occurs from the Middle States to Texas. 



A. opaca Lee. — Piceous, head and thorax shining, elytra opaque hlack. 

 Head very sparsely punctulate, a few wrinkles in front of the eyes. Antennse 

 rufo-testaceous, a little longer than the head and thorax. Thorax one-third wider 

 than long, distinctly narrowed at base, sides arcuate, slightly sinuous in front of 

 the hind angles which are slightly prominent, disc very slightly convex, surface 

 sparsely finely punctulate, a few wrinkles along the sides and apex, median line 

 entire. Elytra elongate-oval, rather flat, strise fine and with minute punctures, 

 intervals very flat, dorsal punctures as in sinuata but very indistinct; color 

 opaque black with a faint triangular paler humeral spot. Body beneath piceous, 

 smooth, presternum scarcely visibly punctulate. Legs testaceous. Length .30 

 inch; 7.5 mm. 



Sexual characters as in lucidula. 



This species appears more closely allied to morio and parallela than 

 to any in our fauna. 



Occurs in Georgia and Florida, and appears to be rare as I have seen 

 but three specimens. 



In the Bull. Mosc. 1875, Baron Chaudoir reviews the species of 

 this genus and describes a new one as A. opaca from the Argentine 

 Republic. A new name should be given it by any one knowing the 

 species, the practice of changing the preoccupied names of unknown 

 species is by no means a good one and generally results in no good 

 to science. 



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