THE HAWK MOTHS (SPHINGID^). 



225 



ground unsuitable, and fall ready victims to attack. 

 Their flight in imago is crepuscular and nocturnal with- 

 out exception. 

 There is thus 

 a correlation be- 

 tween habit and 

 structure ; and, 

 as we have seen, 

 the higher Ma- 

 croglossinae and 

 Chcerocampinae which may have a surface pupation and 

 use silken threads tend to discard the ordinary habit of 

 the Heterocera and become day-fliers. 



FIG. 42. Hawk moth (Lophostethus diimolinii}, from 

 Port Natal. 



Manducince. 



The sub-family Manducinae has always attracted 

 attention, with its type Manduca atropos, the well-known 

 Death's Head Moth, which is famed for its peculiar 

 coloration and the squeaking sound that it utters. The 

 pattern and colours, the ringed abdomen, and the 

 contrast between the fore- and hind-wings, ally this 

 Old World group with the typi -,i hawk moths. 



Smerinthina. 



At the foot of the series stand the Smerinthinae, or 

 Eyed Hawks, with dentated wings more or less, small 



Q 



