16 THE CANADIAN ENTOMOLOGIST. 



black spots outside and one inside ; between the thoracic feet are also a 

 few minute black spots. Length about 23 mm. 



Lives socially in a web on Indian hemp (Apocyam androsamifohum, 

 L.) Sept. Spins a thin cocoon, passing the winter in the larval state, 

 and pupates the following spring. 



DESCRIPTION OF PREPARATORY STAGES OF DATANA 



MINISTRA, Drury. 



BY WM. BEUTENMULLER, NEW YORK. 



Egg. — Pure white, ovoid, with flattened base, the apex with black dot 

 showing impregnation. Laid in masses, from 25 to 50 on under side of 

 leaf. • 



Young Larva. — Head black, shining, second segment orange brown 

 in front, cervical shield black. Body color chestnut brown, with the 

 stripes a little darker ; anal clasps and thoracic feet jet black. Length 

 3 mm. 



After First Moult. — The head jet black, as is also the whole of 

 the second segment and anal segment. Body color now much darker, as 

 are also the stripes, these being almost obscured, except along the lateral 

 region. Thoracic feet black. Length 12 mm. 



After Second Moult. — Head black, rather small, second segment 

 yellow except the cervical shield, black. The thoracic feet, abdominal 

 and anal legs, and termination of anal segment, jet black, while the stripes 

 are very clear yellow on the chestnut brown ground. Scattered over the 

 body are also a few short sordid white hairs. Length 20 mm. 



Until after this moult the larva? feed upon the under side of leaf (par- 

 enchyma), and do not attack the edges until after the third moult begins. 



After Third Moult. — Head jet black, second segment orange, cer- 

 vical shield black. Body color reddish-brown with rather broad yellow 

 stripes ; anal clasps, tip of legs and thoracic feet jet black ; under side 

 striped equally with reddish-brown and bright yellow. Length 30 mm. 



After Fourth Moult. — Head jet black, neck yellow, cervical shield 

 jet black, shining. Body chestnut brown, the stripes bright yellow and 

 equidistant ; the feet and anal clasps jet black, abdominal legs yellow 



