11(10 FAMILY LIII.- CHKYSOMKLIDvE. 



Ki;V TO GROUPS OK INDIANA DOXACIA. 



(i. Head and thorax evidently pubescent above. Group .1. 

 (//. Head occasionally, thorax never pubescent. 



&. Elytra truncate or subtruneate at tip. Group B. 



bl>. Elytra rounded at tip: sutnral margin of elytra sinuate behind the 



middle. Group C. 



GKOUP A. 



But two Indiana species belong to this group. They are widely 

 different in size and general appearance and, except in the pubes- 

 cence of head and thorax, have little in common. 



KEY TO SPI-XTKS OF GROUP A. 



/. Elytra without pubescence: hind femora slender, without a tooth. 



2022. PUisicoLLis. 

 <nt. Elytra evidently pubescent; hind femora swollen, toothed. 



2023. PUBESCENS. 



2022 !<;r,2:!). DONACIA PUBICOLLTS Snffr.. Stett. Zeit., 1X72. 21. 



Elongate, rather robust, convex. Brown, bronzed; antenna 1 , tibhe and 

 tarsi dusky: femora reddish-yellow. Head, thorax, scutellum and under 

 surface clothed with short gray, but not dense, pubescence. Third joint of 

 ajitenn;e nearly twice longer than second. Thorax longer than broad, me- 

 dian line distinct on basal half; sides with an obtuse tubercle in front of 

 middle; disk finely and densely punctate. Elytral punctures small, rounded, 

 rather close set in more or less irregular rows; intervals rugulose ; tips 

 rounded. Mesosterimm narrower than cox;e. Length 10-12 mm. 



Lake County; rare. May 20. A few specimens taken by Wol- 

 cott along the beach of Lake Michigan, near Pine. Known hereto- 

 fore only from northern Illinois, where it occurs on water-lilies. 



202.". (<;r>:;.S). DOXACIA priiKscExs Lee., Trans. Amer. Ent. Soc.. II. 18(57, o~>. 

 Elongate, slender, subconvex. Pale reddish-brown, everywhere rather 

 densely clothed with short, silky, gulden hairs. Antenna? pit-eons, rather 

 stout, third joint one-half longer than second. Thorax slightly longer than 

 broad, feebly constricted near middle, broadly channeled on median third: 

 feebly and obtusely tnberculate each side. Elytral punctures coarse, inter- 

 vals nearly Hat : tips subtruncate. Mesosternum narrower than coxa?. Length 

 7-9 mru. 



Lake, Kosciusko and Marion counties; rare. June 9-June 16. 

 Known only from Canada, Illinois and Michigan. Occurs on pick- 

 erel weed. 



GROUP B. 



This group comprises 14 species, among them Ihe most common 

 < IKS cc..-urring in the State. All agree in having the elytra more 

 or less truncate at apex. The form in a number of them is flattened 



