EXPLANATIONS TO PLATES. 
PLATE I. 
Fia. I. Cossus eenterensis. 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 Cossus, unspread. 
11. Female Cossus. 
12. Female Cossus, showing ovipositor. Bai- 
ley del. 
PLATE H. 
Fig. 1. Cossula magnified. Pupa case. 
2. Cossula magnified. Male. 
3. Go88ula magnified. Female. 
4. C088U8 querciperdd. Male. 
5. Cossus querciperdd. Female. 
6. Cossus dngrezi. Female. Bailey del. 
PLATE III. 
Flo. \. Sphinx cher sis. On ash. JohnE. LeConte 
del. 
2. Same. 
3. Deilephild linedtd. On elm. J. Bridgham 
del. 
4. Smerinthu8 myops. John E. LeConte 
del. 
5. Janassa lignicolor. Riley del. 
6. Hypdrpax durord. Miss Emily L. Mor- 
ton del. 
7. Adonetd spmuloides. Miss Emily L. 
Morton del. 
8. Metdnema quercivordrid. John E. Le- 
Conte del. (His No. 47). 
9. Endropid sp. John E. Leconte del. 
(His No. 46). 
PLATE IV. 
Fig. 1. Ddtdna ministrd. Before the last 
molt. H. C. Bumpus del. 
2. Ddtdnd ministrd. Full fed. H. C. 
. Bumpus 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; lb, head; 7c, end of body en- 
larged. "Wilder del. 
8. Geometrid larva on oak ; a, end of body 
enlarged. Wilder del. 
9. Antepione depontdnatd. Wilder del. 
10. Pyralid larva on poplar; a, head and 
prothoracic segment enlarged. Wilder 
del. 
11. Nematus (?) larva on alder. Wilder del. 
12. Selandria (?) larva on alder ; a, end of 
body enlarged. Wilder del. 
13. Selandria (?) larva on alder ; d, end of 
body enlarged. Wilder del. 
14. Selandria (?) larva on birch; a, end of 
body enlarged. Wilder del. 
PLATE V. 
Fig. 1. Notodontd strdguld, before the last molt. 
Wilder del 
2. Cerura on willow. Wilder del. 
3. Schizura on willow. Wilder del. 
4. Scoliopteryx libdtrix. Wilder del. 
5. Amphiddsys cogndtdrid, before the last 
molt. Wilder del. 
6. Deilinid vdrioldrid. 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 unduldtd, larva. Wilder del. 
10. Meropterd prdvelld ; a, head ; b, end of 
body, enlarged. Wilder del. 
11. Gimbex dmericdnd before last molt. Wil- 
der del. 
PLATE VI. 
Fig. 1. Eacles imperidlis ; la, front view, with 
head elevated. J. Bridgham del. 
2. Noctuid larva on pine. H. 3umpus del. 
3. Semiothisdbisigndtd Walk. Miss L.Sul- 
livan del. 
4. Lydd sp. on pine. Wilder del. 
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