CHRYSOMELID^. 



509 



ten or twelve days afterwards, while the last one stays under 

 ground all winter, and only emerges in the beetle state in the 

 following spring, just 

 in time to lay its eggs 

 upon the young po- 

 tato leaves," which it 

 devours to such an ex- 

 tent as to sometimes 

 almost cut off the en. 

 tire crop in certain lo- 

 calities. The Editors 



d 



of the ' ' American En- 



Fig. 5061. 



tomologist," from whom we have quoted, enumerate and 

 figure various beetles, hemiptera, and a species of Tachina fly 

 (Lydella doryphorse Riley) which mostly prey upon the larvae. 

 Dr. H. Shimer shows, in the "American Naturalist," vol. iii, 

 p. 91, that a dry and hot summer is very unfavorable to the 

 development of this insect, the pupse dying for want of suffi- 

 cient moisture in the soil. The best remedy against its attacks 

 is hand picking. 



A very closely allied species or variety, the D. juncta Ger- 

 mar (Fig. 506 1 ), may be easily confounded with the other spe- 

 cies, but differs, according to Walsh, in the head 

 of the larva being paler, while in the beetle the third 

 and fourth stripe from the outside are united, where 

 they are distinct in the D. 10-lineata, and the legs 

 are entirely pale yellow, with a dark spot on the 

 femora. It feeds on the wild potato, not eating Fi s- 506 2 . 

 the cultivated species, and has always been an inhabitant of the 

 Western and Southern States. 



Ohrysomela is an oval oblong genus, and its ally, Calligrapha, 

 is very convex, hemispherical ; the species are gaily spotted and 

 banded ; Cattigrapha scalaris Lee. is abundant on the alder. 

 The larvae (Fig. 506 2 , larva of C. Philadelphia Linn.) are 

 thick and fleshy, with a row of black spiracles along the side 

 of the body, and a dark prothoracic shield. 



Eumolpus auratus Fabr. is a shining, rich golden green bee- 

 tle, found on the dog's-bane. 



Chlamys is a little oblong, cubical, roughly shagreened, 



