SYNOPTIC TABLE OF COLEOPTERA. 



METRITIS, Each. 



A broad, stout species of a very singular form, at first sight looking rather 

 like a Heteromer, found under stones in forests see Lee. classification p. 10. 

 M. contractus, Escli. Zool. Atl. 1. 8, t. 4. f . 4. 20-25 mm. Cal. Or. Wash. Terr. 



PROMECOGNATHUS, Chaud. 



Elongate shining insects with smooth elytra and long mandibles. 

 Elytra one half longer than wide. 1. laevissimus. 



Elytra only about one third longer than wide. 2. crassus. 



1. laevissimus,, Dej. Spec. IV. II. Chaud. Bull. Mosc 1146 



p. 524. Length 10-11 mm. Cal. 

 '_'. crassus, Lee. Trans. Am. Ent. Soc. 1868 p. 62. 

 Length 10.5-16 mm. Cal- Or. 



PASIMACHTJS, Bon. 



Large ipecies with antennae inserted under frontal 

 plates ; anterior tibiae palmate, hind angles of thorax 

 distinct. They are usually found under stones or old 

 logs, mostly tin sandy places, in the Atlantic, Southern 

 and Western States, but not on the Pacific Slope. 



Leconte classifies them Bull. Buff. Soc. N. H. 1874 

 p. 266 ff. Cf. also Lee. Ann. Lye. N. H., N. Y. 1848 

 p. 141-151, and Putzeys Monog. Mem. Liege II. 1846. 



Elytra obtusely rounded behind; spine of middle tibiae ••ompressed, obtuse 

 at tip. 

 Hind angles of thorax rectangular, prominent, large. 1. strenuus. 

 Hind angles of thorax obtuse, not prominent, small. 2. sublsevis. 

 Elytra subacute beldud ; spine of middle tibia? slender, acute. 

 Prothorax not constricted at base. 



Hind angles obtuse and not prominent, large. 3. marginatus. 



Hind angles rectangular and slightly prominent, 



small. 4. subsulcatus. 



Prothorax more or less constricted, hind angles prominent, 

 body more .slender. 

 Antennae with joints 2-4 not carinate ; elytra with fine 



rows of punctures arranged in pairs. 5. niexicaims. 



Antennae with joints 2-4 compressed and carinate. 

 Hind tibia? $ not densely pubescent on inner side. 



Bull. Brooklyn Ent. Soc. June 1879. 



