EXPLANATION TO PLATES. 



EXPLANATION TO PLATE VI. 



Fig. I.— The Periodical Cicada: A, d" of typ- 

 ical form — natural size; c, d, genital 

 books — enlarged ; ;j, singing appa- 

 ratus— natural size ; B, cf of the small 

 form (cassinii) — natural size ; e,f, gen- 

 ital lioolis — enlarged. (After Kiley, 

 and Hagen.) 



Fig. 2. — Dermcstes rvlpinus : a, egg; 6, c, laixa 

 lateral and dorsal view; h, pupa, ven- 

 tral view : 1% beetle— enlarged : d, dor- 

 sal view of one of the middle joints of 

 larva denuded to show spines and tu- 

 bercles; t, ventral viewof tip of abdo- 

 men in (J beetle; e, head of larva; /, 

 left maxilla of same, with palpus ; g, 

 labium of same, with palpi — enlarged. 

 (Original.) 



FjG. 3. — Eiirycreon rantalis: a, larva; d, chrys- 

 alis—twice natural size ; /, moth — 

 slightly enlarged; 5, side view of mid- 

 dle joint of larva ; c, top view of last 

 joint of larva; e, cremaster or anal tip 

 of chrysalis — greatly enlarged. (Orig- 

 inal.) 



EXPLANATION TO PLATE YII. 



Fig. l. — Acjrotis messoria: a, larva; 6, ruoth — 



natural size. (Alter Eiley.) 

 Fk;. 2. — Diplosis nigra : a, larva seen from above; 



b, same, from side— enlarged ; d, last 

 joint of larva, from above ; c, head of 

 larva, from above; e, "breast-bone" of 

 lai-vii — all greatly enlarged. (Origi- 

 nal.) 



Fig. 3. — Diplosis nigra : a, adult female, from 

 side ; 6, genitalia of male, from side ; 



c, pupa, from side — all much enlarged ; 



d, antenn.e of male ; c, antennae of fe- 

 male — still more enlarged. (Original.) 



j-jG. 4. — Diplosis nigra: Genitalia of male, from 

 above — greatly enlarged. (Original.) 



Fig. 5. — Anthonomus nnisculus : Spray of straw- 

 berry, showing beetles at work — natu- 

 ral size. (Original.) 



Fig. 6. —Anthonomus iiiuscidus : Adult, enlarged. 

 (Original.) 



EXPLANATION TO PLATE VIII. 



DESTFvUCTIVE LOCUSTS. 



(Figs. 1 and 5, original ; 2, 3, and 4, from Second Re- 

 port U. S. Entomological Commission ; 6 and 7, 

 from First Keport U. S. Entomological Commis- 

 sion.) 



Fig. l.—Melanoplv.s devastator .- large cf from Cal- 

 ifornia, 1885 — natural size. 



Fiu. 2. — Mclanoplus devastator : small $,Keno, 

 Nev., 1880— natural size. 



Fig. ^.—Melanoplus devastator: large ?, Red- 

 ding, Cal., 1880 — natural size. 



Fig. 4. — Mclanoplus devastator : cf , Fort Keogh, 

 Montana, 1880— natural size. 



Fk.. Z.— Mclanoplus devastator: a, anal charac- 

 ters of cf, from above ; &, anal charac- 

 ter's of d", from the side; c, anal char- 

 acters of c^, from behind— much en- 

 larged. 



Fig. 6. — Melanopjlus spretus: «, anal characters 

 oi (S , from above ; 6, anal characters of 

 cf , from side: c, anal characters of cf, 

 from behind- much enlarged. 



Fig. 7. — Mclanoplus atlanis: a, anal characters 

 of cT, from above ; h, anal characters of 

 cT, from side; c, anal characters of cT, 

 from behind — much enlarged. 



EXPLANATION TO PLATE IX. 

 THE WHITE PINE WEEVIL. 



Fig. 1. — a, larva, from side; b, pupa, from be- 

 neath ; d, beetle, from above — all en- 

 larged. (After Packard.) 



Fig. 2.— «, twig showing burrows of larvaj in 

 heai t-wood and sap-wood (original); b, 

 twig showing pupa cells from the out- 

 side, and cut away to sliow interior. 



Fig. 3.— a, dwarfed tree with a single bent shoot; 

 b, dwarfed tree witli two shafts. 

 (Original.) 



Fig. 4. — Deformed tree at Brunswick, Me. (froma 

 draAving by Prof. G. L. Yose). 



Fig. 5. — Defoi-med tree at East Providence. E. I. 

 (from a photograph). 



(2) 



