XXIV 



LIST OF ILLUSTRATIONS. 



340. Galls on broom caused by 



A sjihonthilia sarolhamni 



341. A-^/>li(iiiiii//i(i farol/ianvii . 



342. Pupa of A yp/iondylia mro- 



t ham III 



343. Gall on stem of bramble 



caused by Lasiojitera 

 rubi .... 



344. Galls ou stems of willow 



caused by Agromyza 

 i^chineri 



345. Leaf of snowberry mined 



by Chromatomyia oh- 

 scurella 



346. Leaf of holly blotched by 



Chromatomyia ilicis 



347. Bibio marci (males and 



females) 



348. Three-year-old spruce in- 



jured by larvffi of Bibio 

 marci .... 



368 

 369 



369 



369 



370 



372 



372 



374 



374 



COLLECTING, PREPARATION, 

 AND MOUNTING. 



349. Simple arrangement for 

 dissecting specimens 

 under a magnifying- 



3o0. Proboscis of honey-bee . 



351. Tongue of house-dy 



352. Life - liistory stages of 



" Swallow-tail" Butter- 



fly ... . 



380 

 385 

 385 



386 



APPENDIX. 



353. Boring apparatus of the 



female of Nemahis 

 Erichsonii . . .418 



354. Six-year-old larch injured 



by larvte of Nematufi 

 laricis . . . . 421 



