Ochsenheimer's Genera of the Lepidoptera of Europe. 447 



Genus 22. STYGIA, Drap., Latr*. 

 Bombyx, Hiibn. 

 Legs, posterior tibiae with very distinct spines and calcaria. 

 Antenna short, insensibly diminishing in size from the base to 

 the apex, curved, covered beneath with a double row of 

 small laminae ; apex simple. 

 Palpi thick, cylindrical, squamate, reaching beyond the cly- 



peus. 

 Tongue obsolete, or none. 

 Anus barbate. 



Species Icon. 



1. S. ^^ D ^P- I Hiibn. Bombyces, Tab. 57. f. 244. 

 Lirm, y Hubn").J ( mas - } 



Genus 23. SESIA, Fab. 

 jEgeria, Fab. Trochilium, Scop. Sesia, Hiibn. 



Legs, tibiae clothed with long scales ; the posterior with four 

 elongated spines or calcaria, disposed in pairs. (Latr.) 



Wings long and small, displayed nearly horizontally ; the su- 

 perior incumbent on the inferior ; the latter hyaline ; the 

 former very narrow, and usually fenestrate. (Latr.) 



Antenna fusiform, incrassate towards the middle, simple; 

 apex with a small scaly tuft. 



Palpi reaching beyond the clypeus, pointed. (Latr.) 



Antlia long and thin, except in the two first species. 



Abdomen sub-cylindrical ; anus barbate. (Latr.) 



Flight, diurnal. 



Larva, nearly bare, cylindrical, without any horn at the ex- 

 tremity of the body. (Latr.) 



Pupa elongate ; back spinous. 



Obs. The caterpillars of the Sesia gnaw out the interior of 

 vegetables, and make themselves a more or less solid co- 

 coon therein, composed of the detached and pulverized 

 portions, which they agglutinate, and connect together 

 by silk. They usually pass the winter in that state, and 

 become perfect insects in the following spring. (Latr.) 

 Ochsenheimer very justly observes that the term Sesia, 



being derived from the Greek word <rv\$, (tinea,) would be 



more correctly spelt Setia, since the genitive of the original 



is cnjT0£. 



Authors are not well agreed as to the arrangement of the 



species of this genus. Stephens separates those which occur 



in Britain into two families, Sesiida and JEgeriida ; the first 



* Generic Characters, from Latreille. 



containing 



