68 SPHINGIDiE. 



one genus (Apocalypsis) develops long fleshy spines ; only one 

 colour-form, generally green, but brown patches may occur in 

 individuals of Psilogramma menephron ; oblique stripes always 

 present, but never ocelli. 



Pupa. — With a free tongue -sheath, the other characters 

 variable. 



Habits. — Eggs laid singly on food-plants belonging to several 

 families ; pupation in a cell underground, except in the case 

 of Meganoton nyctiphanes ; the moth rests with the wings 

 held somewhat below the horizontal. 



Hab. Cosmopolitan. This is the largest tribe in the sub- 

 family. It is not a homogeneous group, and includes insects 

 which are intermediate in development between the Acheron- 

 tiini and the Sphingulini. Six Indian genera. 



Key to the Genera. 



Imagines. 



1 . Pulvillus present 2. 



Pulvillus absent or reduced to a triangular 



lobe 4. 



2. Paronychium with two lobes on each side ; 



long terminal spur of hind tibia only one- [p. 69, 



fifth shorter than the tarsal segment .... Meganoton Boisd., 

 Paronychium with one lobe on each side . . 3. 



3. End-segment of antenna long ; second seg- 



ment of palpus with naked stripe on inner [& Jord., p. 77- 



side . Psilogramma Roths. 



4. Hind tibia with two pairs of spurs 5. 



Hind tibia with one pair of spurs Sphinx Linn., p. 92. 



5. Fore tarsus with three long curved claws on [p. 85. 



first segment Pentatetjcha Swinh., 



Fore tarsus without such claws 6. [p. 81.. 



6. Expanse over 120 mm Apocalypsis Butl., 



Expanse less than 80 mm Pseudodolbina 



T [Roths., p. 86. 



1. Horn down-curved, thin, whip-like, colour [p. 82. 



blue Apocalypsis Butl., 



Horn straight, or slightly up- or down- 

 curved 2. 



2. Horn long, straight, blue with a red stripe [Roths., p. 89. 



up each side from base Pseudodolbina 



Horn straight or slightly down-curved, [Jord., p. 79. 



green with paler tubercles Psilogramma Roths, k 



Horn straight or slightly up -curved near tip, 



black with sides yellow or bluish-green [p. 69*. 



without crimson stripe Meganoton Boisd., 



Pupse. 



1. Colour chestnut with a plum-like bloom. . . Psilogramma Roths. 

 Colour chestnut or reddish-brown without [& Jord., p. 80. 



plum-like bloom 2. 



2. Tongue -sheath short and thick, not highly [p. 69. 



arched Meganoton Boisd., 



Tongue-sheath long and thin, highly arched. 3. [p. 84. 



3. Length of pupa about 60 mm Apocalypsis Butl., 



Length of pupa about 40 mm Pseudodolbina 



[Roths., p. 90. 



