BXPLANATIOi^S TO PLATES. 



PLATE I. 



FiQ. 1. Oos$u8 center ensis. Group of eggs as 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 Coasus, unspread. 



11. Female Cossus. 



12. Female Cossua, showing ovipositor. Bai- 



ley del. 



PLATE II. 



Fig. 1. Gotsula magnifica. Pupa case. 



2. Oosiula magnifica. Male. 



3. Oogsula magnifica. Female. 



4. Cossus querciperda. Male. 



5. Cossus querciperda. Female. 



6. Cossus angrezi. Female. Bailey del. 



PLATE III. 



FlO. 1. Sphinx chersis. 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. 



€. Hyparpax aurora. Miss Emily L. Mor- 

 ton del. 



7. Adoneta spmuloides. Miss Emily L. 



Morton del. 



8. Metanema quercivoraria. John E. Le- 



Conte deJ. (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 Tninittra. Full fed. H. C. 

 Bumpu-j 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. GeDmetrid larva on red maple ; 7a, nat. 



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

 larged. Wilder del. 



8. Geometrid larva on oak ; o, 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. Nematns (?) larva on alder. Wilderdel. 



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 stragula, 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, bead ; 6, 



end of body, enlarged. Wilder del. 



9. Rydria undulata, larva. Wilder del. 



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



body, enlarged. Wilder del. 



11. dmbex amerieanahefoTelnat molt. Wil- 



der del. 



PLATE VI. 



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

 head elevated. J. Bridgham del. 



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



3. Semiothisabisignata Wa.\h. Miss L. Sul- 

 livan del. 



4. Lyda sp. on pine. Wilder del. 



923 



