CLASSIFICATION AND DESCRIPTION OF COMMON INSECTS 1 79 



achemon), Pandorus Sphinx {Pholtis pandorus) on Virginia creeper, 

 Twin-spotted Sphinx {Smerinthus geminatus), Thysbe Clear- wing 

 {H(Bmorrhagia thy she) on Viburnum, snowberry and hawthorn. 



SATURNKNA (GIANT SILK-WORM MOTHS) 



This super-family includes the following famihes: Bomhycida, 

 HemileucidcB, CitheroniidcB and SaturniidcB. The larger number of 

 commonly occurring forms belong to the third and fourth famihes 

 which may be distinguished by the presence of two anal veins in the 

 former and only one in the latter. 



CERATOCAMPID-S (CITHERONIID^) 



This family contains such magnificent forms as the Regal Moth 

 {Cither onia regalis) and Imperial Moth {Basilona imperialis), and the 

 economic Oak-worm moths {Anisota) and the Green-striped Maple-worm 

 moth {Anisota ruhicunda) . 



Green-striped Maple-worm {Anisota ruhicunda Fab.). — The cater- 

 pillar of this moth injures maples of all kinds, box-elder and oak. 

 Usually two generations in a season. 



Adult. — A pale yellow moth with a deHcate shade of pink; wing 

 expanse of female 1^-2 inches; her body yellow and woolly and her 

 head small with thread-hke antennae. Male is smaller with plumose 

 antennas. 



Eggs. — Pale green turning yellowish; 3'^5 inch in diameter. Each 

 female may lay 150 eggs on the under side of leaves; hatch in 8-10 

 days. 



Larva. — A naked pale yellow green caterpillar, striped with dark 

 green; armed back of the head on second thoracic segment with two 

 long black horns, and along the sides and anal extremity with short 

 black spiny projections. Two inches long in a month, when full grown. 

 Four moults. Goes into ground to pupate. 



Pupa. — Dark brown, armed with little spines on margin of ab- 

 dominal segments and on thorax; anal segment ends in a forked pro- 

 jection. Duration two weeks. 



BOMBYCIDiE 



Silk-worm Moth {Bombyx mori L.). — An Asiatic species, domestic- 

 ated for its silk for many hundreds of years in Europe and Asia. Many 



