187 



Family SESIID^E. 



Diurnal Lepidoptera, which feed on the wing and settle on leaves 

 in hot sunshine ; the flight very rapid. 



Antennae often dilated or knobbed. Legs often with thick tufts 

 of hair ; mid tibiae with one pair of spurs ; hind tibiae with two 

 pairs. Frenulurn present. Wings generally more or less hyaline ; 

 fore wing with veins 1 a and 1 b forming a fork at base ; 1 c absent ; 

 veins 4 to 11 given off at almost even distances from the cell. 

 Hind wing with three internal veins ; vein 8 coincident with 7. 



Many species are close " mimics " of various Hymenopterous 

 forms. 



Larva : a fleshy internal feeder on bark or pith, with five pairs 

 of prolegs. 



Pupa armed with hooks for movement in the galleries. 



Key to the Genera. 



a. Hind legs without tufts of hair on the 



joints, 



a'. Fore wing with veins 7 and 8 stalked. 

 a 2 . Proboscis wanting. 



a 3 . Fore wing with vein 5 present. 



Hind wing with veins 3 and 4 



from angle of cell. 



a 4 . Hind wing with discocellulars 



oblique ; palpi of medium 



length , 1. TROCHILIUM, p. 188. 



& 4 . Hind wing with discocellulars 



nearly erect ; palpi longer . . 2. SPHECODOPTERA, p. 189. 

 b 3 . Fore wing with vein 5 absent . . 3. ANTHRENOPTERA, 

 b~. Proboscis present. [p. 190. 



a 3 . Hind wing with discocellulars 



almost erect. 



4 . Fore wing with vein 2 present. 

 Hind wing with veins 3 and 

 4 from cell. 



a 5 . Hind tarsi of moderate 

 length, and not fringed 

 with scales. 



6 . Abdomen with lateral 

 tufts on the terminal 



segments 4. TRILOCHANA, p. 190. 



b G . Abdomen with the termi- 

 nal tuft only 5. SCIAPTERON, p. 191. 



b 5 . Hind tarsi extremely long 

 and fringed with scales on 



the last four joints above . 6. MACROTARSIPTIS, p. 194. 

 6 4 . Fore ving with vein 2 absent. 



Hind wing with veins 3 and [p. 194. 



4 stalked 7. ICHXEUMENOPTERA, 



