CLASSIFICATION OF INSECTS. 175 



rest, reposing in a nearly horizontal position ; the 

 fore wings nearly erect : flight diurnal, brisk, and 

 bustling. Hesperia, Thymele. 



641. Butterflies (Papilionites). Larva some- 

 times naked, but generally covered with down, 

 hair, or spines : with ten prehensile legs. Pupa 

 naked ; mostly angulated, always attached by the 

 tail ; changes in the air. Imago with clavated 

 antennte not hooked ; all the wings erect, and 

 meeting above the back when at rest. Polyom- 

 matus, Lyccena, Thecla, Amaryssus, Colias, Pon- 

 tia, Apatura, Limenitis, Hipparchia, Vanessa, 

 Argynnis. 



642. Loopers, or slender bodies (Geometrites). 

 Larva naked, slender, and very elongate, with 

 four prehensile feet ; in consequence of the length 

 of body without feet, its back is arched in 

 walking. Pupa smooth, rounded ; situation of 

 change, various. Imago with antennae tapering to 

 a point ; in the males often highly pectinated ; 

 wings ample, expanded ; body very slender ; flight 

 in the evening, silent, feathery. Geometra. 



643. Half-loopers {Phytometrites). Larva 

 naked, elongate, less slender than the preceding, 

 with six prehensile feet; in walking its back is 

 arched, but not so decidedly as in the preceding. 

 Pupa smooth, rather pointed at the tail ; changes 

 in a slight web. Imago with filiform antennae ; 

 wings deflexed ; moderately stout body ; beauti- 

 fully coloured : often with brilliant metallic 



