914 FAAIIliV Tj. — SCARAB.loID.E. 



Hi). Thorax iinely rugose without distinct grjiiuiles ; pygidium and 



hist ventral smooth. 1725. ciialcites. 



aa. Sides of thorax beneath with an entire transverse carina; size small, 



4^6 mm. 



h. Clyi^eus with two teeth ; bright bronze or greenish. 1726. viridis. 



hh. Clypeus with four distinct teeth; bro\vTi, bronzed, shining; eyes 



larger. 1727. perplexus. 



1723 (5425). Canthon nigricornis Say, Journ. Phil. Acad. Nat. Sci., Ill, 



1823, 207 ; ibid. II, 133. 

 Broadly oval. Black, subopaque, sparsely and finely granulate; head 

 and thorax often with a purplish, reflection. Clypeus six-toothed, the two 

 front ones more prominent, flattened and slightly recurved, the others 

 smaller. Elytra with subobsolete strife. Length 6-9 mm. 



Tw'o specimens from near North Judson, Starke County. 

 July 18. 



C. ehcinis Say, deep black, length 7-10 mm., is known from 

 Maine and Pennsylvania to Kansas and Texas; C. depressipennis 

 Lee, greenish-black, length 7-10 mm., has been recorded from Cin- 

 cinnati ; C. prolnis Germ., dull black, length 6 mm., occurs in Ken- 

 tucky and southward ; 0. rigilaiis Lee, length 17-22 mm., occurs 

 from Pennsylvania and Ohio westward. 



1724 (5435). Canthon L/Evis Drury, Exot. Ins., I. 1770, 70. 



Broadly oval. Usually dull black, tinged with cupreous; sometimes 

 (south and west) varying to deep blue and bright green. Readily known 

 by its larger size and distinct and rather dense .granulations of thorax and 

 elytra. The teeth of clypeus are blunt and but little prominent. Length 

 11-19 mm. (Fig. 360.) 



Throughout the State; common. April 23-September 29. This 

 is our most abundant and best known 'tumble-bug." From mid- 

 April until after heavy frosts it can bo found along every roadside 

 or pathway where hoi-ses or cows have dropped their dung. 



1725 (.5436). Canthon chalcites Hald., Proc. Phil. Acad. Nat. Sci., I, 



1843, 304. 

 Form somewhat more robust, shorter and broader than ?rrr/.s-. Upper 

 surface distinctly and uniformly bronzed ; under surface and legs black, 

 moderately shining. Thorax finely and intricately rugose, not granulate. 

 Elytra granulate, but much more sparsely than in Iwins. Male with front 

 tibife much lon.ger and more curved and middle tibipe distinctly longer than 

 in female. Length 1.3-20 mm. 



Vigo, Knox and Posey counties; frequent. April 2.3-Septem- 

 ber 2. 



1726 (54.38). Canthon virh)is Beauv., Ins. Afr. et Amer., 1805, ,23. 

 Broadly oval or subrotund. Bronzed, strongly shinin.g. Thorax very 



finely punctured. Elytra smooth or nearly so, obsoletely striate. Hind 

 tibiae slightly curved. Length 4-5 nmi. 



Lawrence and Crawford counties; scarce. May 11-July 1. Oc- 



