GENERAL INTRODUCTION. / 



in the genus Sataspes of the tribe Sesiini, subfamily Sesiinje, 

 connecting the Asemanophorze . Ambulicine insects, with the 

 Semanophorze, Philampeline forms. 



The highest region of the head is called the vertex ; behind 

 the vertex is the occiput, with a small triangular sinus situated 

 dorsally on the hinder margin and called the occipital sinus ; 

 the front of the head is called the face, the side the cheek, 

 the underside of the head behind the mouth -parts the gula 

 or throat. 



Fig. 1. 



A. A sphingid larva. The segments are numbered I to 14. a, antenna 



b, true legs ; c, prolegs ; d, claspers ; e, horn ; /, spiracle ; 

 g, secondary rings ; h, anal flaps. 



B. Segment 8, enlarged. /, spiracle ; i, the four main hairs. 



C. Spiracle, enlarged, showing central slit. 



D. One of the true legs, a, base ; b, first segment ; c, second segment 



d, third segment, bearing a claw. 



E. Proleg. a, base ; b, shank, with terminal fringe of hair ; c, ankle 



d, foot, with a fringe of hooklets. 



The true clypeus (fig. 2 A, b) is roughly triangular, but the 

 apex may be rounded ; the sides maj^ be straight or curved 

 inwards or outwards ; the base is generally somewhat emar- 

 ginate and the basal angles are frequently occupied by low 



