30 



are known at times to migrate. Can we account 

 for the wide range of this insect by migration? 

 I can scarcely imagine that it has been imported 

 into other countries by commerce. 



Sp. 41. Cacti. — This insect belongs to Dr. Leach's 

 genus Chilochorus, and inhabits South America, 

 The Coccinella Cacti of Marsham, is evidently a 

 distinct species. 



Chrysomela, Linneus. 



The genus Chrysomela derives its name from 

 many of the species belonging to it resembling 

 golden apples ; some of them, particularly those of 

 the genus Eumolpus, are occasionally worn by the 

 South American ladies, strung like beads into neck- 

 laces. The original genus of Chrysomela, ( so con- 

 stituted by Linneus,) included insects of various 

 other families, such as Erotylus, Cyphon, Diaperis, 

 Endomychus, Mycetophagus, Allecula, Melandrya, 

 Cistela, Lagria, Tillus, and others. Later writers, 

 however, have very properly detached from this 

 magazine several well-established genera : much re- 

 quires to be done in subdividing it more accurately 

 than has yet been attempted. The Chrysomeloidea, 

 as a group, presents us with very varied forms. It 

 is probably richer also in species than any other 

 group of our acquaintance, not excepting even the 

 Curculionidea. As to magnitude, they rarely attain 

 to it. Many of the species are gregarious, while 

 others again are solitary in their habits. The whole 

 of them I believe to be herbivorous feeders. Occa- 



