652 



AN INTRODUCTION TO ENTOMOLOGY 



Zimmermann's pine-pest, Pinipestis zimmermdnni, is a common 

 species, the larva of which is a borer. It infests the trLinks of pine, 



causing large masses 

 of glim to exude. The 

 moths appear in mid- 

 summer. 



The coccid-eating 

 pyralid, LcBtUia cocci- 

 divora, differs from the 

 other members of this 

 family in being preda- 

 cious. It feeds on the 

 eggs and young of va- 

 rious scale-insects 

 {Pulvinaria, Dactylop- 

 ius, and Lecanium). 

 Figure 800 represents 

 the different stages of 

 this insect enlarged, 

 and the moths natural 

 size resting on egg- 

 sacs of Pulvinaria. 

 Like other members of 

 this family the larva 

 spins a silken tube, 

 within which it lives. 

 On a thickly-infested 

 branch these tubes 

 may be found extend- 

 ing from the remains 

 of one coccid to an- 

 other. 



To this subfamily 

 belong also the goose- 

 berry fruit worm, Zo- 

 phddia grossuldricB, 

 which feeds within the 

 fruit of the gooseberry and currant, and the cranberry fruit -worm, 

 Mineola vaccmii, which bores into cranberry fruit. 



Fig. 800.— LcBtilia coccidivora: a, egg; h, larva; c, 

 pupa ; d, adult ; e, e, moths natural size, resting on 

 egg sacs of Pulvinaria. 



Family PTEROPHORIDyE 



The Plume-moths 



The plume-moths are so called on account of the remarkable form 

 of the wings in most species; the wings being split by longitudinal 

 fissures into more or less plume-lil<:e divisions. In most species each 

 fore wing is separated into two parts, by a fissure extending about one- 

 half the length of the wing; while each hind wing is divided into 



