386 REPORT 4, UNITED STATES ENTOMOLOGICAL COMMISSION. 



PLATE IV. 



HKLI0THI8 ABMIOKKA. 



(After Glover.) 



Pig. 1. 

 Fig. 2. 



Fig. 3. 



Fig. 4. 

 Fig. 5. 



Fig. 6. 



Fig. 7. 



Fig. 8. 



Fig. 9. 

 Fig. 10. 



Fig. 11. 



Egg, natural siize, as deposited on the out- 

 side of the involucel or ruffle. 

 Holes eaten through the involucel and 



corolla by the young boll worm, before 



the flower bud has matured into the 



perfect flower. 

 Young boll worm eating stamen, &c., and 



causing its destruction. 

 Frass dropped by young worms. 

 Hole eaten through the bottom of flower 



into the embryo seed vessel or boll. 

 Young worm eating interior of young 



boll. 

 Pistils and stamens destroyed by attack 



of young worms, and frequently the 



cause of non-impregnation. 

 Young flower-bud as attacked by the 



young worm, with the interior eaten 



out. 

 Same, as fallen ; the involucel always, in 



planters' phrase, "flaring open." 

 Fu U-grown into fuU- 



grown boll — hence another common 



name, " Bore Worm." 

 Parenchyma or cellular tissue of the leaf 



Fig. 12. 



Fig. 13. 

 Fig. 14. 



Fig. 15. 

 Fig. 16. 



Fig. 17. 

 Fig. 18. 



Fig. 19. 



Fig. 20. 



Fig. 21. 

 Fig. 22, 



as eaten by the caterpillar the third 



day from the hatching of the egg. 

 Hole eaten through the involucel the fifth 



day. 

 Size of worm before shedding its first skin. 

 Young worm eating the calyx the sixth 



day, sheltered by the involucel or 



ruffle. 

 Size of worm after first molt. 

 Young worm eating the flower bud, the 



ninth day. 

 Size of worm after the second molt. 

 Young worm eating into the young boll, 



the fourteenth day. 

 Size of worm when molting the third 



time, showing the worm in the act of 



shedding the skkv. 

 Full-grown boU worm, with hole eaten in 



seeds of boll after shedding skin the 



fourth time (nineteenth day), with 



frass in the boll. 

 Boll cut open longitudinally to exhibit in- 



Worm, natural size, after shedding skin 

 the sixth tinie. 



PLATE V. 



LEUCANIA UNIPUNCTA. 



(Original.) 



Fio. 1. Glistening secretions which often show 

 where eggs are laid between fold of 

 gre«n leaf. 



Fio.2. Young larva. 



Figs. 3, 4, 5. Full-grown larvae, ventral, dorsal, and 

 lateral views. 



Fig. 6. Larva, showing Tachina eggs near head. 



Fig. 7. Pupa. 



Fig. 8. Moth with wings expanded. 



Fig. 9. Moth showing normal position of wings 



when closed, back view. 

 Fig. 10. Pale specimen of moth from side. 



PLATE VI. 



AKATOMY OF ALEXIA XYLINA. 



(Original.) 



Fig. 1. Longitudinal section of larva : M, mouth ; 

 a,6,c, legs; (Sf., stomach ; <SaZ., salivary 

 gland; d.v., dorsal vessel; m. v.,mal- 

 pighian vessels ; In., intestine; B, rec- 

 tum ; 1, 2, 8, 4, 5, false legs ; br, brain ; 

 flr, g, ganglia. 



Fio. 2. Second proleg. 



Fig. 3. Hook of proleg. 



Fig. 4. Third right leg. ' 



Fig. 6. Terminal hook or claw of same leg. 



Fig. 7. Wall of the stomach, the epithelium re- 

 moved: tr, trachea; I, I, longitudinal 

 muscles. 



Fig. 8. Cuticula from a dark band of larva. 



PLATE VII. 



ANATOMY OF ALETIA XYLES'A. 



(Original.) 



Fig. 1. Longitudinal section of head of larva: If, 

 mouth ; /, frontal ganglion ; br, brain ; 

 s, suboesophageal ganglion; 61., first 

 abdominal ganglion ; Oe., oesophagus ; 

 Sp., salivary tubercle or spinneret. 



Fig. 2. Longitudinal section of head of imago : 

 m',m2,m', muscles; mx, maxiUaB; ScU,, 

 salivary duct; P., palpus; Oe., OBSO- 

 phagus; JBr, brain. 



