142 



FAMILY II. CARABIDJE. 



• ././. Mentum with a small emarginate tooth. 



XLV. Metabletls. 



gg. Labial palpi thick, oval ; claws of tarsi more or less serrate ; 

 length 3 mm. XLVI. Axinopalpes. 



ff. Tarsi with the fourth joint emarginate or bilobed ; tarsal claws 

 serrate. 



k. Thorax truncate at base ; mentum toothed. 



/. Tarsi with fourth joint bilobed: elytra blue or green. 



XLVI I. Callida. 



It. Tarsi with fourth joint emarginate. 

 m. Tarsi not hairy above ; size medium. 7-11 mm. 



n. Last joint of labial palpi more or less triangular or 

 hatchet-shaped; thorax with sides rather widely 

 margined near base, which is squarely truncate. 



XLVIII. Plocttionus. 

 nn. Last joints of -both palpi similar, more or less cylin- 

 drical, truncate. XLIX. Ptnacodkra. 

 mm. Tarsi hairy above; next to last joint of labial palpi 

 usually with more than two setae; length 10-15 mm. 



L. Cymindis. 



kk. Thorax lobed at middle of base : tarsi hairy above ; last joint 

 of labial palpi hatchet-shaped. LI. Apexes. 



cc. Mandibles without grooves on outer side; mentum not toothed: 

 fourth tarsal joint not dilated; claws simple. 



LIT. Pentagoxica. 



XXXIX. Tetragonoderus Dej. 1825. (Gr., "four + angled.") 



Small piceous or brownish-yellow beetles, separated from allied 

 genera mainly by the characters given in key. One species has 

 been taken in Indiana, while another may occur. 



KEY TO INDIANA SPECIES OF TETRAGONODERUS. 



a. Elytra in great part piceous; legs and outer joints of antenna? piceous: 

 presternum margined at tip. ixtersectus. 

 aa. Elytra more brownish-yellow than piceous; legs and antennas wholly 

 brownish-yellow ; presternum not margined. 244. fasciates. 



T. intersectus Germ.. 5-6 mm. in length, has been taken in Ken- 

 tucky and the Gulf States, and perhaps occurs in southern Indiana. 



244 (866). Tetragonoderes fasctatus Hald.. Proc. Phil. Acad. Xat. Set., 

 I. 1842, 298. 



Ovate, subdepressed. Head and thorax piceous. bronzed, minutely alu- 

 taceous; elytra grayish or dull yellow, with a semicircular space about the 

 scutellum. a broad irregular broken band at middle, and the apical fourth 

 piceous. Thorax one-half wider than long, sides curved, hind angles dis- 

 tinct; disk smooth, the median line distinct. Elytra oval, rather deeply 

 striate, the stria? not punctured ; intervals convex, the third with two small 

 dorsal punctures. Males with three joints of the front tarsi dilated and 

 clothed with small scales beneath; last ventral notched at middle of hind 

 margin. Length 4.5 mm. 



