Prothorax densely and coarsely punctured, abdomen moderately punctate. 



36- Chaudoiri- 



15. — Thorax strongly sinuate, hind angles rectangular, base not broader than apex. 16. 

 Thorax very distinctly broader at base than apex, moderately or not sinuate. 

 Smaller species,(i2.5 — 17 mm). Color green to blue, legs pale. . 37- SericeilS 



Larger. (21 — 23 mm). Color blackish, tarsi piceous 38- fusClCOmis 



12. — Thorax distinctly sinuate. Color and size of fuscicornis. ...... 39- eiythropUS 



16. — Color black with tinge of blue, elytra very finely striate 40- ViridifrOIlS 



17- — Body above unicolorous, thorax feebly narrowed at base 41- herbaceUS 



Elytra with apical third rufous, thorax coarctate at base 42- nificauda 



BIBLIOGRAPHY. 



validus, Chevr. (Omaseus), Col. Mex. II, n. 174; 15-18 mm. Ariz. Mex, 



tomcntosus, Say. (Epomis), Trans. Am. Phil. Soc. II, p. 6o.=ductuoso, Germ. (Amara), 



Ins. Spec, Nov. p. io.=amp/us, Lee. Proc. Acad. 1856, p. 29. 13-15 m. E. ofR.Mt. 

 purpuricoffis, Randall, Bost. Journ. II, p. 35.-8 mm. N. Y. toKs. 

 alternates, Horn. Trans. Am. Ent. Soc. 1871, p. 327. — 12. 5. m. Saskatchewan region. 

 niger, Randall, Post. Journ. II, p. T,$.=exaratus, La Ferte, Ann. Ent. Soc. Fr. 1851, 



p. 249. — 12.5 mm. Can. La. Fla. 

 iiitomtptus, Horn. Trans. Ent. Soc. V, 259. — 11.5 mm. Or. 

 karpalinus, Esch, Zool. Atl. V, p. 27. — 11 mm. Pacif. St. 

 impunctifrons, Say. Trans. Phil. Soc. II, p. 64.— 13-15. 5 mm. Can. to Tex. 

 ciratmcinciits, Say.Trans. Am. Phil. Soc. IV, p. ' \\%.=zuirens-, Chaud. Bull. Mosc. 1843, 



p. 753. =/W/, Chevr, Ann. Ent. Soc, Fr. 1863, p. 194. — 10-iim. Gulf St, Cuba. 

 texanus, Horn. Trans. Am. Ent. Soc. V, 261.— 12.5 mm. Tex. 

 petmsylvanicus, Say. Trans Phil. Soc. II, p. 6d.=ancinus, Dej. Spec. V, p. 659.=//*- 



bescens, Harris, N. Eng. Farmer, i828,=/w/w/t7//><>/M, || Kby, Fauna. Am. Bor. 



IV, p. 21.— io-ii mm. North, Can. to Cal. 

 jloridanus, Horn, Trans. Am. Ent. Soc. V, p. 263. — 12 mm. Fla, 

 brevilabris, Lee, Ann. Lye. IV, p. 337.== ( ?w«v««, Chaud, Bull. Mosc. 1856, II, p. 282 



=consimilis, Lee. Ann. Lye. IV, p. 337. — 10-12 mm. Ills. Tex. Io. N.Mex. Col. 

 tricolor, Dej, Spec. II. p. 334.=? '/§•//< c/w, Say, Trans. Am. Phil. Soc. 1834, p. 419. 



—quadricollis, Kby, Fauna. Bor. Am. IV, p. 22.=clialybeipcnnis, Chevr, Col. 



Mex. I, p.j2.=a/rij>c-/i//is, Lee, Ann. Lye. IV, p.336. — 11.5-13 mm. Can.toTex 



Ariz. S. Cal. 

 nemoralis Say, Trans. Am. Phil. Soc. II, p. 65. =longicollis, Chaud, Bull. Mosc. 1843, 



p. 752.=var. oxygonus, Chaud. loc. cit. p. 753. — 11-131111-11. Can. to Tex. 

 glaucus, Lee. Proc. Acad. 1856, p. 2%.=sericinitens, Chaud. Bull. Mosc. 1856, II, p. 



284. — 1 1-12.5 mm, Cal. 

 simillimus, Chaud, Bull. Mosc. '56, II, p. 283.=v/a'm<s, J Mann'.' Bull. Mosc. '43, p. 



193. — 1 1.5 mm. Cal. 

 nebraskensis, Lee. Proc. Acad. 1856, p. 28. — 10.5--13 mm. Dakota to Tex. Nev. 

 variabilipes, Esch, Zool. Atl. V, p. 2 p j.=aspcrtdus, Menet, Bull. Acad. St. Petersb. 



1844, II, p. $$.=obsatrns, Lee, Ann. Lye. V, p. 179. — 10-11.5 mm. Cal. 

 vafer, Lee. Proc. Acad. '52, p. 66. — 12 mm. Tex. 



