TTTF LEAF RKETLFR. 1187 



c. Elytra with a subniarginal black stripe. 

 <1. Abdomen densely and finely punctured, subopaque and clothed 



with distinct pubescence. 



e. Head coarsely punctured from side to side; occiput piceous or 

 brown. 2192. QUINQUEVITTATA. 



ce. Head smooth at middle. 



/. Discal black stripes of elytra narrower than yellow one each 

 side; head and body beneath always pale yellow; labrum 

 pale. 2193. CAROLINIANA. 



//. Discal black stripes of elytra as wide or wider than the yel- 

 low one each side; head and metasternum usually more 

 or less fuscous or piceous ; labrum piceous. 



2194. CRENICOLLIS. 



<ltl. Abdomen very sparsely punctured and shining, its pubescence 

 scarcely visible ; thorax smooth ; head rough ; epipleurse black. 



2195. GLABRATA. 



cc. Elytra without a subuiarginal black stripe, the median stripe 

 broad; thorax without spots. 2196. ABBREVIATA. 



1>1>. Elytra without black and yellow stripes. 



(I. Elytra reddish, with a large discal black spot. 2197. DISCOIDEA. 

 (jd. Elytra blackish-blue or green. 



//. Body beneath and legs entirely black; thorax with three spots 

 arranged in a triangle ; elytra punctate. 2198. TRIANGULARIS. 

 lili. Body beneath and legs, in part at least, yellow. 



/. Hind femora entirely or in part piceous; abdomen alone wholly 

 yellow; elytra blue-black; head wholly piceous. 



2199. XANTHOMELuENA. 



//. Hind femora entirely yellow; abdomen piceous, its apex and 



sides yellow; head bicolored. 



.j. Elytra blue or violet; body oval. 2200. MELLICOLLIS. 



jj. Elytra bright green ; form more oblong. 2201. COLLATA. 



2191 (6950). DTSONYCHA PENNSYLVANIA Illig., Mag. fur Insect., VI, 1807, 



146. 



Oblong, nearly parallel. Head black, front yellow; thorax pale yellow, 

 usually with three black spots, the central one larger, truncate in front, 

 gradually narrowed behind; elytra whitish-yellow with the suture, a sub- 

 niarginal stripe and. a median stripe not reaching the apex, black; antenna? 

 and under surface, except the prosteruuin and sides of abdomen, black ; 

 femora reddish-yellow, tibia? and tarsi usually black or piceous. Thorax 

 more than twice as wide as long, side margins rather wide, surface shining, 

 nearly smooth. Elytra alutaceous, sparsely and finely but distinctly punc- 

 tate, and in the female often feebly silicate between the discal stripes. 

 Length 6.5-7.5 mm. 



Throughout the State, common ; more so in the northern coun- 

 ties. February 11 -October 20. Occurs on sedges and mints in 

 moist meadows. Hibernates beneath cover along the borders of 

 marshes and lakes. 



The common form, as above described, \vas named unujuttata 



