286 



METAZOAN PHYLA 



iiS' 



Fig. 184. — Codling moth, C'arpocapsn pomoneZ/a Linnaeus. (From Farmers' Bull. 171, 

 by Simpson, and 283, 6?/ 5co« and Quaintancc, U. S. Dept. Agr.) A, larva, working in an 

 apple. B, pupa. C, pupa in cocoon. D, adult. A, B, and D, X 1}'2; C*. X /^2- The 

 moth lays eggs in the eyes at the blossom ends of young apples and the larvae which hatch 

 from them burrow into the apple, where they pass the larval period. After the apple falls, 

 the larva leaves it, seeks a sheltered crevice, such as a crack in the bark, or under an object 

 on the ground, and forms a silken cocoon, within which it changes to a pupa. 



Fig. 185. — Plant galls due to insects. A, galls on oak caused by a gall wasp, Dryo- 

 phanta tanata Gill. B, a gall on a goldenrod stem caused by a gall fly, Eurosta solidaginis 

 Fitch. C, a gall developed on the end of a willow shoot and caused by a gall fly, Rhabdo- 

 phaga strobiloides Walsh. D, a so-called oak apple, caused by a gall wasp, Amphibolips 

 confluens Harris. E, a blackberry gall, caused by a gall wasp, Diastrophus ?iebulosus Osten 

 Sacken. F. a rose gall caused by a gall fly, Rhodites rosae (Linnaeus). Ail about natural 

 size. {A to E from Metcalf and Flint, "Fundamentals of Insect Life," after Felt, by the 

 courtesy of McGraw-Hill Book Company, Inc.; F from Comstock, " Manual of the Study of 

 Insects," by the courtesy of Comstock Publishing Company.) 



