THE GKOUND BEETLES. 195 



sandy localities. January lO-Novemlxn- 24. Often seen running 

 over plowed groimd in early spring. 



305 (1181). Anisodactylus carbonarius Say, Traus. Ainer. I'bil. Soc, II. 

 3823, 32; ibid. II, 400. 



Elongiite-obloug. Male, black, feebly sbinliiy ; Temale, rusty, opaque; 

 antemue and logs piceous, tarsi reddisb-browi. Thorax slightly broader 

 at base than apex, sides feebly curved; hind angles obtuse; margins broad- 

 ly depressed near base, finely and sparsely punetulate. Elytral intervals 

 finely alutaceous, slightly convex in male, flat in female; the third punc- 

 tured as in rusticus. Length 12.5-13.5 nun. 



Throughout the state; common, hut less so than rusticus. 

 March 19-October 17. 



Groi p B. (Anisodactylus.) 



Oblong species usually shining and glabrous; terminal spur, of 

 front tibie dilated at middle. Elytra striate, the second stria with 

 a distinct dorsal puncture. Males with the front, tarsi broadly, 

 the middle tarsi rather feebly, dilated. 



KEY to INDIANA SPECIES OF GROUP B. 



a. Black species; hind tarsi slender, equal to tibiae, first joint nearly as 

 long as the next two together ; male with first joint of middle tarsus 

 pubescent at tip. 

 b. Clypeus with one bristle-bearing puncture on- each side. 



c. Elji:ra opaque, the stria? -feeble, especially at tip ; hind angles of 

 thorax obtuse, sides regularly curved, base as wide as elytra. 



360. FURVUS. 



cc. Elytra shining in both sexes, more deeply striate. 



d. Elytra oblong, their sides nearly parallel; intervals feebly con- 

 vex, distinctly but sparsely punetulate, feebly shining. 



307. INTERPUNCTATUS. 



dd. Elytra oval, their sides curved; intervals convex, smooth; form 

 more robust, surface shining. 308. agricola. 



bb. Clypeus with two bristle-bearing pu)ictures each side, 

 c. Hind angles of thorax obtuse. 



f. Side margin of thorax very distinctly depressed, and with the 



base punetulate. 309. harrisii. 



ff. Side margin of thorax scarcely depressed. 370. nigerrimis. 



cc. Hind angles of thorax distinct, nearly rectangular. 



g. Elytra with sides nearly straight, subparallel; intervals dis- 



tinctly but sparsely punetulate. 371. nigrita. 



!j(j. Elytra with sides distinctly curved; intervals smooth, shining; 



form more robust. 372. mei^^nopus. 



aa. Bicolored or metallic species; hind tarsi slightly flattened, shorter than 



the tibi*, first joint but little longer than second; luale witli first 



joint of middle tarsus glabrous beneath. 



h. Thorax piceous, brownish-yellow at sides; length 11 nun. 



373. DISCOIDEl s. 



7i/(. Thorax entirely piceous; length 9-10 mm. 374. haltimorensis. 



