150 THE COMMONER BUTTERFLIES. 



46. Genus Euphoeades, 



EUPH(EADES TKOILUS— THE GREEN-CLOUDED SWALLOW- 

 TAIL. 



(Papilio troilus.) 



Butterfly. — Wings blackish brown, the upper surface with a 

 submarginal series of spots, which are round and pale straw-color 

 on the fore wings, larger, semilunate, and pale blue-green on the 

 hind wings, which have, besides, an orange spot next the middle 

 of the costal margin, an orange and green spot next the anal 

 angle, and the middle of the wing dusted with green and metallic 

 blue in varying quantity. On the under surface of the hind 

 wings this last is replaced by an arcuate series of broad orange 

 lunules, edged within with yellow and without with black, and 

 followed outwardly by metallic blue dusting ; but the series is 

 interrupted in the middle by one of the lunules and its appurte- 

 nances becoming a comet-like mass of green scales. Expanse 

 about 4 inches. 



Caterpillar. — Head pale green. Body naked, largest at the 

 third thoracic segment, dark green, paler beneath, the sides of 

 the third thoracic segment with a large, circular, finely black- 

 edged, buff spot, containing above a small turquoise spot and 

 below a larger velvety black spot ; first abdominal segment 

 above with a pair of approximated, finely black-edged, large 

 ovoid buff spots having a small turquoise spot within ; and the 

 hinder abdominal segments with transverse series of six small, 

 ovoid, black-edged, turquoise spots. Length 1|^ inches. 



Chrysalis. — Kelatively smooth with no striking prominences 

 except the divergent frontal projections and moderate thoracic 

 elevation; a lateral ridge the whole length of the body, the wing- 

 cases protuberant beneath ; pale yellowish green above, all 

 prominences and ridges reddish brown, pale green beneath ; or 

 griseous with mingled yellowish and brown dottings above. 

 Length 1^ inches. 



This thongli a southern butterfly extends north to about 

 the 43d degree of latitude, though it appears to be limited 

 westward by about the 95tli degree of longitude. Its flight 

 is rather swift and unwearied, in long zigzags, usually only 

 just above the low bushes which it frequents. It winters 



