Seasonal Dimorphism in BnUerfiics. 21 1 



upper surface, but witli tlie under side decidedly of 

 the dry-season type. 

 C4. Offspring of C. Egg laid April 26; hatched May 3 ; 

 2:)upated June 28 ; kept under normal conditions ; 

 emerged Aug. 3. A dry-season female. 



Tcracolus omphale, Godt. 



D, A wet-season female (Figs. 7, 7ft). Captured April 



26, 1899. On the same day laid 19 eggs, which 

 hatched on May 3. Seven of the resulting butter- 

 flies are in the Hope collection, as follows : — ■ 



Di. Exposed to damp heat from 6 p.m., June 17, to 

 11 p.m., June 25; pupated 11 p.m., June 17; 

 emerged June 27. A dry-season male, crippled. 



D2. Pupated 2 p.m., June 17 ; damp heat 6 p.m., June 

 17, to 11 p.m., June 25 ; emerged June 27. A 

 yellow dry-season female, imperfectly expanded. 



D3. Damp heat 6 p.m., June 17, till emergence; 

 pupated 8 p.m., June 17; emerged June 28. A 

 yellow dry-season female. 



D4. Pupated 2 p.m., June 17 ; damp heat 6 p.m., June 

 17, to 11 p.m., June 25 ; emerged June 29. A dry- 

 season male, not extreme. 



D5. Pupated June 10; normal conditions; emerged 

 July 12, A white dry-season female, more ad- 

 vanced than D2 and D3 ; as shown by the dimin- 

 ution of the dark markings on the upper surface, 

 and the disappearance of the transverse bar and 

 orange-shaded discoidal spot on the under side of 

 the hindwing, traces of these being visible in both 

 the females D2 and D3, which had been exposed 

 as pupae to damp heat. 



D6. Pupated June 10 ; normal conditions ; emerged 

 July 14 (Figs. 8, 8a). A white dry-season female, 

 still more advanced than D5. 



D7. Pupated June 16 ; normal conditions ; emerged 

 July 17. A dry-season male, more advanced than 



E. A yellowish wet-season female. Captured April 30, 



1899. Laid 15 eggs the same day. Offspring : — • 

 Ei. Hatched May 8; pupated June 28; normal con- 

 ditions; emerged July 25. A white dry-season 

 female, with dark markings on disc of forewing 

 greatly reduced, and with a yellowish shade re- 

 TRANS. ENT. SOC. LOND. 1902. — PART II. (JUNE) 15 



