THE LEAF BEETLES. 



1123 



"Wells, Putnam. Knox and Posey counties; scarce. June 14- 

 September 11. Occurs on poplar. 



2069 (6628). Cryptocephalus venustus Fabr., Ku\. Sysl.. II, 1792, 42. 



Robust, subcylindrical. Head and thorax reddish-brown, 

 the latter with sides narrowly and two oblique basal spots 

 yellow; color of elytra as given in key; under surface and 

 legs reddish brown. Thorax finely and rather closely punc- 

 tate. Elytra with regular rows of rather fine punctures. 

 Length 4.5-5.5 mm. (Fig. 485.) 



Throughout the State; common. May 25-August 

 2. Occurs on the flowers of "white-top" (Erigeron) 

 in timothy meadows, also on those of ironweed wild Fi s 485 x 5 - 

 sweet potato, etc. Varies greatly in color, the thorax (After Wickham ) 

 being often entirely reddish (var. ornatus Fab.) or the elytra black 

 with sides, narrow line at suture and basal spot vellow (var hama- 

 tus Melsh.) 



2069a (6628c) . Cryptocephalus venustus cinctipennis Rand., Bost. Journ. 

 Nat. Hist., II, 1838, 45. 

 A color variety of venustus having the elytra black, with narrow mar- 

 ginal line, apex, and rarely the suture, yellow. Length 4-5 mm. 



Northern half of State; frequent. June 16-August 12. Occurs 

 especially on foliage of dwarf birch, Betula pumila L., along the 

 borders of marshes. 



2070 (6637). Cryptocephalus trivittatus Oliv., Ent, VI, 1808, 824. 

 Smaller, subcylindrical. Reddish-brown; thorax yellow, with three 



rather wide brown stripes; elytra brownish-yellow, each with an oblique 

 stripe on side and very narrow margin brown ; also with a common sutural 

 stripe and a short stripe or oblong spot at base of fourth interval, brown 

 Sixth and seventh rows of elytral punctures interrupted and confused 

 Presternum nearly fiat, strongly margined at sides, acutely bilobed behind 

 Length 3.5-4 mm. 



Lake County ; rare. July 30. Occurs on hazel. 



C. insertus Hald, thorax reddish-brown with sides yellow ely- 

 tra yellow, with two broad oblique black stripes ; length 4.2 mm., is 

 a southern form recorded from Cincinnati. 



2071 (6640). Cryptocephalus mutabilis Melsh., Proc. Phil. Acad Nat 



Sci., Ill, 1847, 172. 



Robust, subcylindrical. Reddish-brown, shining; thorax with apical 

 and side margins narrowly yellow, with or without two oblique basal spots- 

 e ytra pale yellow with a large, common brown spot extending backward 

 along the suture; each also with six or seven small brown spots arranged 

 three m a basal row, one or two near middle and two near apex Thorax 



