FIELD BOOK OF INSECTS. 



united, and more or less compressed; eyes always longer 

 than wide, indented in front 10. 



8. Head less densely punctured than pronotum, usually red 

 behind the eyes, though often wholly black or with a small 

 red spot in front; otherwise black, clothed with short, 

 rather dense, black or gray pubescence, which often forms 

 a marginal stripe and rarely a sutural line on elytra; 

 length about .4 in. Adults on various plants, especially 

 Convolvulaceas Epicauta trichrus. 



Head and pronotum similarly punctured, the former 

 always black; elytra clothed with dense gray or grayish- 

 yellow pubescence 9. 



9. Pronotum longer than wide, densely pubescent, with 

 a dark line each side of the middle Epicauta strigosa. 



Pronotum as wide as long, moderately shining, rather 

 coarsely and densely punctured Epicauta ferruginea. 



10. Elytra clay-yellow and black; see Plate LXXXV. 

 See above for its biology. The adult shares with Lema 

 trilineata the name of Old-fashioned Potato-beetle but 

 feeds also on tomatoes and various weeds . . Epicauta vittata. 



Elytra without stripes on their middle u. 



11. Body , beneath, clothed with gray pubescence; elytra 

 in part or wholly pubescent 12. 



Body, above and beneath, wholly black; outer spur 

 of hind tibia broader than the inner; length, .3 to .5 in. 

 During autumn on goldenrod especially; sometimes 

 injures garden asters Epicauta, pennsylvanica. 



12. Elytra wholly clothed with uniform, gray pubescence; 

 length, .4 to .75 in. On potatoes and other plants 



Epicauta cinerea. 

 Elytra black, with gray margins and suture; see 



Plate LXXXV. May be only a variety of cinerea 



Epicauta marginata. 



13. Antennae thread-like, the outer joints cylindrical. 



Pyrota. 



Antennas thicker toward the apex, the outer joints 

 oval or rounded. Two genera, which will probably not be 

 noticed: Pomphopcea, with a deeply indented labrum; 

 and Cantharis, with labrum only slightly indented. 



39 2 



