194 



FA MI L Y T T. CAR A BIB PE. 



Born. — U A Review of the Species of Anisodaetylus Inhabiting 

 the United States," in Proe. Amer. Phil. Soc., XIX, 1880, 

 1 62-178. 



Horn.— ''Synoptic Table," in Bull. Brook. Ent. Soc, III, 1881, 

 83. 



About 42 species are known from the United States, 19 of which 

 have been taken in Indiana, while one other may occur. For con- 

 venience the Indiana species are separated into three groups or sub- 

 genera. 



KEY TO GROUPS OF INDIANA SPECIES OF ANISODACTYLUS. 



aa. Terminal spin- of front tibiae normal, slender; species hairy or glabrous. 

 a. Terminal spur of front tibiae abnormal, either trifid or dilated at middle. 

 b. Terminal spur trifid. i. e., with a blunt tooth each side near base; 



species glabrous. Group A. 



bb. Terminal spur dilated at middle, without teeth at base; species 

 usually glabrous. Group B. 



Group C. 



Group A. (Triplectus.) 

 Oblong-oval species having the hind tarsi slender, as long as 

 the tibia-, the first joint as long as the next two, the fourth emargi- 

 rate; elytra striate, intervals smooth, the third with one or more 

 dorsal punctures ; tips distinctly sinuate. But two species of this 

 group have been taken, though another may occur. 



KEY TO INDIANA SPECIES OF GROUP A. 



a. Presternum at middle smooth, not pubescent; clypeus with one bristle- 

 bearing puncture on each side. 

 b. Surface shining, black; legs black. dulcicollis. 

 bb. Surface opaque, distinctly alutaceous ; thorax narrowed from base 

 to apex, widest at base. 364. rusticus. 



aa. Prosternum at middle punctured and pubescent; clypeus with two bris- 

 tle-bearing punctures each side ; thorax nearly as wide at apex as at 



|3 aset 365. CARBON ARIUS. 



A. dulcicollis Lai, 11 mm. in length, is known from the Gulf 

 States and Missouri, and may occur in southwestern Indiana, 

 *364 (1180). AnisodactylUs rusticus Say, Trans. Amer. Phil. Soc, II, 



1823, 32 ; ibid. II, 460. 

 Oblong-oval. Brownish-black; base of antennae and 

 region of bind thoracic angles reddish-brown; legs pice- 

 ous. Thorax broader than long, as broad at base as 

 elytra; sides feebly curved, hind angles obtuse; basal 

 impressions rather shallow, not punctured. Elytra rather 

 deeply striate; intervals convex, the third with one to 

 four dorsal punctures behind the middle. Length 9- 

 14 mm. (Fig. 100.) 

 F 1'onginai X ) 2 ' Common throughout the State, especially so in 



