376 PROCEEDINGS OF THE ACADEMY OP 



5. A. p a 1 1 i p e s />^c, Ann. Lye. N. York, iv, 373 ; Carabus pallipea Fabr., 

 Ent. Syst., i, 159; Syst. EL, i, 200; Oliv., 35, 121, pi. 9, f. 99; A. Leconlei 

 Chaud., Rev. and Mag.' Zool., 1868. 



6. A. r 11 g i c o 1 1 i s Lee, Proc. Acad. Nat. Sci., Phil., 1859, 83. 



I. A. p a r t i a r i u s Chaud., Rev. and Mag. Zool., 1868 ; Tiechus part Say, 

 Trans. Am. Phil. Soc, ii, 90 ; ed. Lee, ii, 504. Dr. Zimraermann believed 

 that he recognized in this species Carabus celer Oliv., 35, 114, pi. 14, f. 168, to 

 which tlie locality " Paris " was incorrectly given ; he supposed that the speci- 

 men was found in Carolina by Bosc, from whose collection it was described. 



8. A p a u p e r c u 1 u s Chaud., Rev. and Mag. Zool., 1868 ; Acupaljms paup. 

 Dcj., Sp. Gen., iv, 463, Ac. con.mnilis Dej., ibid., iv, 465. 



9. A. indistinctus Chaud., Rev. and Mag. Zool., 1868 ; An/palpus ind. 

 Dej., Sp. Gen., V, 846. Dr. Zimraermann determined this speciesasAc.hu- 

 m i 1 is Be/., ibid., iv, 462, which is referred by Chaudoir to Stenolophu.s •. with 

 about twelve specimens before me, I can perceive no greater sexual differences 

 than those observed in other small species of this genus; a specimen deter- 

 mined by Zimmermann as Ac. d i f f i c il i s Dej., Sp. Gen., iv, 435, does not 

 differ, except in being of a uniform pale brown color and scarcely perceptibl}- 

 more elongated. Should this synonymy be correct the species must be called 

 A. h u m i 1 i s, the specific name under which it was first published. 



10. A. t e s t a c e u s Chaud., Rev. and Mag. Zool., 1868 ; Acupalpus test. Dej., 

 Sp. Gen., iv, 460. 



II. A. m i c r o s Lee, Ann. Lye. N. York, iv, 412. My description mentions 

 the only distinguishing character between this and the preceding, which is, 

 that the scutellar stria, though sliort, is quite obvious. 



STEXOLOPHUS Dej. 



Ill this genus the raentum is semicircularly emarginate, without median 

 tooth ; the front and middle tarsi of the male are dilated, and furnished beneath 

 with two rows of squamiform papilla?. The form of the dilated joints enables 

 the species to be divided into natural groups. Until the male is known, it is 

 somewhat difficult to decide whether some of the smaller species should be re- 

 ferred to this genus or to Ajonoderus ; but in doubtful cases, in the absence of 

 specimens with dilated front tarsi, I have referred to Stenolophus all those in 

 which the first and second joints of the hind tarsi are much longer than the 

 tiiird and fourth ; in other words, those in which the hind tarsi are more slen- 

 der, and the joints'^diminish in length more rapidly than in Ayonoderus. 



Our S]jecies may be grouped as follows : 



A. Body rather stout, prothorax but little narrower than thr elytra; front 

 and middle tarsi of nule broadly dilated ; fourth joint very deeply bilobed ; 

 .scutellar stria long. 



a. Sides of prothorax broadly flattened, scarcely reflexed. 



75 mm. Black, not very shining ; 1st joint of antennie, tibi:e and tarsi 

 brownish 1. c a r b o n a r i u s. 



b. Sides of prothorax less broadly flattened, more strongly reflexed. 



65 mm. Piceous black, shining; base of antenna?, margin of prothorax, 

 epij)leuriB and feet brown ; basal impressions of thorax feebly and sparsely 

 punctured 2. s p r e t u s. 



c. Prothorax narrowly margined, margin not reflexed. 



6-5 — 7 mm. Piceous with brassy lustre, margins of thorax and elytra tes- 

 taceous, base of antenii;e and feet more or less brown ; prothorax subquadrate ; 

 .basal angles nearly rectangular, rounded at tip, impressions finely punctured 

 and rugose •. 3. 1 i m b a 1 i s. 



7 — 7-5 ram. Black, shining, elytra piceous or testaceous, slightly iridescent, 

 base of antennis and feet more or less testaceous or brown ; prothorax feebly 



[Dec. 



