THE LEAP BEETLES. 114] 



XXIV. CHRYKdCiius C:hev. lS:i4. (Gr., "goldsmith.") 



This genus is represented in the eastern United States by a 

 single large polished green spei'ies -which lives upon the foliage of 

 milkweed (Asdepias) . 



2110 ((JTll). Chbysochus AURATi's Fab., Ent. S.vst., 1775, 101. 



Oblong, convex. Green, brilliantly ]>olislied; elytra often with a cop- 

 pery or brassy tinge; antennn', legs and under surface bluisli-black. Head 

 and thorax with coarse, very si)arse, deep iJinictures intermingled with 

 minute ones. Elytra finely and irregularly punctate. Length S-11 mm. 



Throughout the State; common. June 11-August 10. Oceur.s 

 on doghane or Indian hemp {Apocyiinm) as well as milkweed. 



XXV. Tymnes Chap. 1874. 



Here belong three medium-sized oblong- forms, two of which have 

 been taken in Indiana, while the other, violarcux, perhaps occurs, 

 having been described from Penusjdvania. The key is that of Dr. 

 Horn. 



KEY TO SPECIES OF TYMNES. 



I/. Sides of metasternum comparatively smooth. 



6. Color variable, green, bronze or cupreous; elytra coarsely punctate 



even to the apex ; apical angle acute, very slightly prolonged in the 



male. 2111. tbicolok. 



Zjfi. Color deep blue with violaceous reflections; elytra not cnarsely and 



i-ather sparsely punctate, at apex quite smooth; apical angle not 



acute. vioLACEUS. 



aa. Sides of metasternum densely and coarsely punctured; color piceous, 



slightly bronzed; elytra moderately coarsely punctured even to the 



apex; sutural angle well defined, not acute. 2112. metasteknaus. 



2111 (C744). Tymnes tricolor Fab., Ent, Syst., I, 1775, .'IKi. 



Oblong, convex, sul)i>arallel. Bronzed or ijreenish, sinning; brown Ixv 

 neath; antennse and legs pale reddish-brown. Thorax rather closely and 

 finely punctured on sides, nearly smooth on middle and tiiw:ird base. Ely- 

 tra irregularly and rather coarsely punclatc. Male with last ventral seg- 

 ment broadly emai'ginate and with .-i ti-ausverse depression, f^eugth (i- 

 7.5 mm. 



Throughout the State; freiiiient. June 1-July 21. Taken by 

 beating hazel, oak, ^vild j^rape and ironweed. 



T. I inhircus Horn, was described from Alle.Kheny, Pennsylvania. 



2112 ((!745). Ty'Mnes metasternalis Crotch., Proc. Phil. Acad. Nat. Sci., 



1,S7.-'., :!S. 

 Form and color of the preceding, but shorter and less shining. Head 

 and thorax more closely and evenly punctured. Elytra somewhat more 

 sparsely punctured and with traces of costa'. Length .5-(> mm. 



