CHRYSOMELID.E. 



509 



ten or twelve days afterwards, while the third brood of beetles 

 stays under ground all winter, and only emerges late in the 

 following spring, just 

 in time to lay its eggs 

 upon the 3'oung 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 

 of the "American En- 

 tomologist," from whom we have quoted, enumerate and 

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

 (Lydella dorj^phorjie Riley) which mostly prej' upon the larvae. 

 Dr. H. Shinier 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 pupa3 dying for want of suffi- 

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

 is hand picking. 



A ver}^ closely allied species or variet}', the D. juncta Ger- 

 mar (Fig. 506'), 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 Fig. ooe^, 

 the cultivated species, and has alwaj's been an inhabitant of the 

 Western and Southern States. 



Chrysomela is an oval oblong genus, and its ally, CaUigraplia, 

 is ver}' convex, hemispherical ; the species are gaily spotted and 

 banded ; Calligrapha scalaiis Lee. is abundant on the alder. 

 The larviT? (Fig. 506^, larva of C. Philadelphica Linn.) are 

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

 of the bod}^, and a dark prothoracic shield. 



Eumoljvis cmratus Fabr. is a shining, rich golden green bee- 

 tle, found on the dog's-bane. 



Chlamys is a little oblong, cubical, roughly shagreened. 



