LIST OF ILLUSTRATIONS. 



XXlll 



294. Female scale of As}ndiotus 



295. Male scale of AspidioUiH . 



296. Female scale of Diaspis . 



297. Male scale of Bias/, is 



298. Female scale of Chioua-yns 



and Mytilaspis 



299. Male scale of Chionaspis . 



300. Pygidium, or anal seg- 



ment, oiMytilasjjis pom- 

 orum, showing dorsal 

 and ventral parts, 

 &c. .... 



301. Male scales of Chionaspis 



salicis .... 



302. Female scales of Chion- 



aspis salicis 



303. Life-history of Chionaspis 



salicis .... 



304. Scale of Aspidiotus on leaf 



of Lapageria 



305. Scale of Aspidiotus on leaf 



of Stephanotis 



306. Scale of Aulacaspis 7'os(v 



on dog-rose 



307. Female scales of Lecanium 



capreo', " brown scale," 

 on sycamore 



308. Adult female Lecanium 



after treatment with 

 potash X 20 . 



309. Typical antennae of female 



Lecanmm . 



310. Male and female scales of 



Pidvinaria . 



311. Male of Pxdvinaria, species 



found on currant . 



312. Male of Lecanium, species 



found on sycamore 



313. Scales of Physohennes 



ahietis 



314. Depressions on twigs of 



oak caused by Astero- 

 lecanium variolosum. 



3 1 5. Psetidococcus cicensonbark 



of hornbeam 



316. Antenna of Pseudococcus 



aceris .... 



317. Leg of Pseudococcus aceris 



318. Rostrum of Pseudococcus 



aceris .... 



319. Cryptococcus fagi on 



beech .... 



320. Apterococcus fraxini 



