EXPLANATIONS TO PLATES. 



PLATE I. 



Fig. I. Co stus center ensis. Group of eggs aa de- 

 posited, natural size. 



2. Egg magnified 9 diameters. 



3. Caterpiller from time of emerging to Oc- 



tober 14 — four months' growth. 



4. Caterpillar of one year and four months' 



growth. 



5. Caterpillar of two years and four 



months' growth. 



6. Mature caterpillar, three years old ; 



ready to pupate. 



7. Pupal cell. 



8. Male pupa. 



9. Female pupa. 



10. Male Cossus, unspread. 



11. Female Cossus. 



12. Female Cossus, showing ovipositor. Bai- 



ley del. 



PLATE II. 



Fig. 1. Costula inagnifica. Pupa case. 



2. Oosiula magnifica. Male. 



3. Cosgula magnifica. Female. 



4. Cotsus qrtercijierda. Male. 



5. Cossus querciperda. Female. 



6. Cossus angrezi. Female. Bailey del. 



PLATE III. 



Fig. 1. Sphinx cher sis. On ash. JohnE. LeConte 

 del. 



2. Same. 



3. Deilephila lineata. On elm. J. Bridgham 



del. 



4. Smerinthus myops. John E. LeConte 



del. 



5. Janassa lignicolor. Riley del. 



6. Hyparpax aurora. Miss Emily L. Mor- 



ton del. 



7. Adoneta sptnuloides. Miss Emily L. 



Morton del 



8. Metanema quercivoraria. John E. Le- 



Conte rfeJ. (His No. 47). 



9. Endropia sp. John E. Leconte del. 



(His No. 46). 



PLATE IV. 



Fig. 1. Datana ministra. Before the last 

 molt. H. C. Bumpus del. 

 2. Datana ministra. Full fed H. C. 

 Bumpu-4 del. 



PLATE IV— Continued. 



Fig. 3. Noctuid larva. H. C. Bumpus del. 



4. Noctuid larva on beech. H. H. Wilder 



del. 



5. Geometrid larva on alder. H. H. Wilder 



del. 



6. Same. 



7. Geometrid larva on red maple ; 7a, nat. 



size; 76, head; 7c, end of body en- 

 larged. Wilder del. 



8. Geometrid larva on oak ; a, end of body 



enlarged. Wilder del. 



9. Antepione depontanata. Wilder del. 



10. Pyralid larva on poplar ; a. head and 



prothoracic segment enlarged. Wilder 

 del. 



11. Nematus (?) larv.i on alder. Wilder del. 



12. Selandria (?) larva on alder; a, end of 



body enlarged. Wilder del. 



13. Selandria (?) larva on alder ; a, end of 



body enlarged. Wilder del. 



14. Selandria (?) larva on birch; a, end of 



body enlarged. Wilder del. 



PLATE V. 



Fio. 1. Notodonta stragtda, before the last molt. 

 Wilder del 



2. Cerura on willow. Wilder del. 



3. Schizura on willow. Wilder del. 



4. Scoliopteryx libatrix. Wilder del. 



5. Amphidasys cognataria, before the last 



molt. Wilder del. 



6. Deilinia variolaria. Miss L. Sullivan, del. 



7. Geometrid larva on willow ; a, head; b, 



end of body, enlarged. Wilder, del. 



8. Geometrid larva on willow ; a, head ; 6, 



end of body, enlarged. Wilder del. 



9. Hydria undulata, larva. Wilder del. 



10. Meroptera pravella ; a, head ; h, end of 



body, enlarged. AVilder del. 



11. Oim6«a; awericana before last mo'-t. Wil- 



der del. 



PLATE VI. 



Fig. 1. Eacles imperialis ; la, front view, with 

 head elevated. J. Bridgham del. 



2. Noctuid larva on pine. H. Cumpus del. 



3. Semiothisabisignata Walk. Miss L. Sul- 

 livan del. 



4. Ly da sp. on pine. Wilder deJ. 



923 



