EXPLANATION^ TO PLATES 



TO REPORT OF ENTOMOLOGIST. 



Where figures are enlarged the natural sizes are indicated in hair-lines at side, unless already 

 indicated in some othe)- way on the plate. 



EXPLANATION TO PLATE I. 



THE PERIODICAL CICADA. 



(Original.) 



Fia. 1. — Pnpa of Ciiada septendeeim as it arises 

 from the ground, side view. 



Fig. 2. — I'upa of Cicada septendecim as it arises 

 from Ibe ;;»rouii(l, dorsal view. 



Fig. 3. — Papa of Cicada septendecim as it arises 

 from the ground, with the forming Ci- 

 c.iil:i bojiinning to issue through a rent 

 along the middle of the thorax. 



Fig. 4. — Forming Cicada in the straight or ex- 

 tended position. 



Fig. 5. — Forming Cicada in the hanging position, 

 lateral view. 



Fig. 6. — Forming Cicada in the hanging position, 

 ventral view. 



Fig. 7. — Forming Cicada in the clinging position, 

 latenil view. 



Fig. 8. — Forming Cicada, dorsal view, with the 

 wings beginning to inflate. 



Fig. 9. — Forming Cicada in the flat-winged posi- 

 tion. 



Fig. 10. — Forming Cicada in the roof- winged posi- 

 tion, and tinal colors becoming tixed. 



Fig. 11. — Side view of complete Cicada, with final 

 coloring. 



EXPLANATION TO PLATE IL 

 SILK CTTLTTJKE. 



(After Pasteur.) 



Fig. 



1. — Silk-worms which have died from flac- 

 cidity after mounting — reduced. 



Fig. 2. — Anatomy of the chrysalis — enlarged 

 twice. 



Fig. 3. — Joint of silk-worm, ahowing pebrine spots 

 in contrast to an incised wound — en- 

 larged sis times. 



Fig. 4.— a, worm with pcbrinous spots just ap- 

 pearing : b. satue, more advanced — en- 

 larged twice. 



Fig. 



Fig. 



Fig. 



Fig. 

 Fig. 



Fig. 



EXPLANATION TO PLATE III. 



SILK-T\-OIlM DISEASES. 



(After Pasteur.) 



1. — Chain ferment of flaccidity— enlarged 



350 diameters. 

 2. — Corpuscles oi pebrine. (Same scale.) 



EXPLANATION TO PLATE IV. 



EGG-PRODUCTION. 



1. — Cell or bag for egg-laying. (After Ro- 

 man.) 



2. — Method of clamping bags. (Orizin.il.) 



3. — Constricted cocoon of fine texture. 

 (Original.) 



4. — Non-constricted cocoon of coarse text- 

 ure. (Original.) 



EXPLANATION TO PLATE V. 



THE PERIODICAL CICADA. 



Fig. 1. — a, 



Fig. 2.- 



Fig. 3.-T 



Fig. 4.— N 



(1) 



recent puncture, front view ; 6. same, 

 surface removed to show arrangement 

 of eggs, from above; c, same, side view; 

 d, egg cavity exposed after eggs are 

 removed, and showing the sculpture 

 left by the ovipositor — all enlarged. 

 (Original.) 



twig showing recent punctures, from 

 front and side, and illustrating manner 

 of breaking; 6, twig showing older 

 punctures, with retraction of bai k, and 

 more folly displaying the arrangement 

 of fibers — natural size. (Original.) 

 wig showing scars from punctures 

 after second year— natural size. (Af- 

 ter Riley.) 



ewly hatched larva — greatly enlarged. 

 (After Riley.) 



