280 



Beetles 



six black spots on the wing-covers (like 12-punctata), does great damage as 

 an adult by eating into the flower-buds of roses, chrysanthemums, and a 

 host of others, the larva feeding on the roots of alfalfa, chrysanthemums, 

 and many other plants. 



FIG. 385. FIG. 386. 



FIG. 385. The cucumber-beetle, Diabrotica 12-punctata. 

 FIG. 386. The California flower-beetle, Diabrotica soror. 

 FiG. 387. Chrysomela digsbyana. (Twice natural size.) 



FIG. 387. 



(Three times natural size.) 

 (Three times natural size.) 



Chrysochus auratus (PL II, Fig. 4), f inch long, golden green in color, 

 found in the East, and C. cobaltinus (PI. II, Fig. 7), of same size and shape, 

 but brilliant blue, found in the West, are the two most beautiful Chrysomelids. 



Chrysomela (Fig. 387) is a 

 genus whose species are often 

 curiously marked with short, 

 curved lines and irregular 

 spots. The active little flea- 

 beetles, with swollen hind 

 femora, and able to leap vigor- 



.-- jtufs ; -,-:* * . j- 



CM nriiiiniiii*t 



* t' I: V. ' s *'..ty- V t? 



FIG. 388. FIG. 389. 



FIG. 388. Lame of the grape-vine flea-beetle, Haltica chalybea. (After Slingerland; 



much enlarged.) 

 FIG. 389. A tortoise-beetle, Cassida bicolar. (Two and one-half times natural size.) 



ously, are common pests of grapes, cucumbers, melons, cabbages, turnips, etc., 

 numerous species being known. They are small, usually about T ' to inch 

 long, and commonly blackish or steel-blue in color. Haltica chalybea, the steel- 

 blue flea-beetle (Fig. 388), is common on grape-vines, where it feeds on the 



