636 TRANSACTIONS OF THE 



2. A. ORBICOLLIS. — Black ; thorax rounded ; third interstitial 

 line with three punctures. 



Inhabits Mexico. 



Body black, polished, impunctured ; antennae , basal 



joint and palpi piceous ; thorax orbicular, truncate before and 

 slightly so behind; lateral edge regularly arquated, not depressed, 

 but with a simple and equally elevated edge ; dorsal line obsolete, 

 anterior and posterior transverse lines obsolete ; basal impressed 

 lines or dots distinct ; elytra with well impressed striae, which 

 are crenate, not punctured ; interstitial lines convex, the third 

 from the suture with three equidistant punctures; feet piceous; 



Length nearly seven-twentieths of an inch. 



Size of A. viduum Fabr., with the similar punctures on the 

 third interstitial line, excepting that they are equidistant, and 

 these lines are more convex, the thorax is much more orbicular, 

 the feet differently colored, and there is no brassy reflection. 

 This cannot be the melanarium Dej., for the striae are as obvious 

 as in the vidimm, and although the thorax agrees with that 

 insect in being " plus etroit " than that of the viduum, yet it 

 would not be described as " subrotundato," as that author ap- 

 plies the same term to designate the form of the thorax of viduum. 

 It is much like A. punctlfurme Say, but it is a little more elon- 

 gated, the thoracic lines are much less distinct, &c. 



3. A. NUTANS Say, (Feronia) Trans. Amer. Philos. Soc. — Since 

 described by Dejean with the name of striatopunctattim. 



4. A. ERRANS Say, (Feronia) Journ. Acad. Nat. Sci. — The in- 

 terstitial space has three punctures, of which the first and second 

 are somewhat nearer than the second and third. 



5. A. PUNCTIFORME Say, (Feronia) Trans. Amer. Philos. Soc. 

 I have an individual that has four punctures on the third inter- 

 stitial space, as Dejean describes his alhicrus to have. 



6. A. OBSOLETUM Say, (Feronia) Trans. Amer. Philos. Soc. 

 Since described by Dejean by the name of luctuosum, Sp. Gen. 

 3, 172. 



7. A. LIMBATUM Say, (Feronia) Trans. Amer. Philos. Soc. 

 Since described by Dejean by the name of palliatum, Sp. Gen. 

 3,174. [424] 



[Vol. IV. 



