THE LEAP BEETLES. 



11S5 



gins and one between these uear ilie isuture. the hitter set obliiiuely so as to 

 foi-ni with its mate a V ; middle of under surface piceous; antennae and legs 

 dull yellow. Thorax twice as wide as long, margins widely flattened ; sur- 

 face ahitaceons, coarsely and sparsely punctate. Elytra a little wider at 

 base than thorax ; disk coarsely, deeply and rather closely punctate and 

 with a distinct raisetl costa extending from umboue nearly to apex. Length 

 3-4 mm. (Fig. 519.) 



Southern half of State, common; much less so in the northern 

 counties. ^May ll-July 6. Taken by beating oak and sifting woody 

 debris. 



0. sufuralis Fab. (Figs. 51S, a&h), pale yellow with brown spots 

 as shown in figure, length .3.5-4 mm., is a southern form which may 

 occur in the Lower Austral life zone of the State. 



2189 (6945). CEdioxtchis queecata Fabr., Syst. Eleut, I, ISOl. 495. 



Oval, depressed. Front of head, thorax, legs, epipleurse and narrow 

 margin of elytra yellow; disk of elytra and under surface piceous. An- 

 tennae longer than half the body, outer joints piceous. Thorax more than 

 twice as wide as long, margin widely flattened, front angles dentiform ; sur- 

 face finely alutaceous, very finely and sparsely punctate. Elytra not wider 

 at base than thorax, umbone distinct, sulcate within; surface finely but 

 distinctly and rather closely punctate. Iiongth 3.5-4 mm. (Fig. 517, c 

 and d.) 



Throughout the State; frequent. April 22— June 18. Occurs on 

 oak, red-haw and other foliage. Elating June 7. The sides of ely- 

 tra are more parallel than in thyamoides and the next. 



Fig. 520. (Edionychis scalaris and its varieties. (After Horn.) 

 2190 (6946). OSdioxtchis scalakis Melsh., Proc. Phil. Acad. Nat. Sci., Ill, 

 1S47, 163. 



Oval, slightly oblong, depressed. Above dull yellow; occiput piceous; 

 thorax with a brown or piceous spot each side, sometimes merged to form 

 a discal space: elytra with three broad, black, common crossbars, confluent 

 along the suture, these sometimes broken into spots ; under surface piceous, 

 legs pale. Thorax as in guercata. Elytra not wider at base than thorax, 

 umbone distinct, surface rather coarsely punctate near base, smoother at 

 tip. Length 4.5-5 mm. (Fig. 520.) 



Lake, ^Marion. Knox. Po.sey and Dubois counties; scarce. April 

 19^uly 9. Occurs on the foliage of plants along marshes. The 

 black of elytra varies much in extent, the spots or crossbars being 

 sometimes so merged as to cover nearly the entire surface. 



