—75— 



Descriptions of the Preparatory Stages of 

 Edema albifrons A. and S. 



BY \VM. BEUTENMULLER. 



Egg. — Pale green, subglobose, slightly concave at the base, 

 smooth, shining. Length .80 mm. Width .50 mm. Duration of 

 this stage thirteen days. Laid in small masses on the underside of 

 leaves. 



Young Larva. — Head large, jet-black shiny, with a few white 

 hairs. Body yellow, with two pairs of minute, wart-like elevations 

 on each segment along the dorsal region. The elevated segment is 

 humped and followed by two brown spots. Along each side there 

 is also a series of wart-like elevations which gradually diminish in 

 size towards the posterior part of the body. All the warts bear a 

 short whitish hair. Body beneath concolorous to the above. The 

 feet are white, semi-translucent; as the larva grows older, fine black 

 stripes begin to appear along the dorsal region, and which are broken 

 by the wart-like elevations. Length 2 mm. Duration of this stage 

 seven days. 



After First Moult. — The head now becomes brick-red or 

 yellow, otherwise as in the previous stage. The larva in this moult 

 begins to attack the leaf, while the young larva eats only the paren- 

 ychma of the leaf. Length 4 mm. Duration of this stage eight 

 days. 



After Second Moult. — Between the black stripes along the 

 dorsal region there is now present a canary-yellow stripe, and across 

 the posterior segment is a series of small black spots. The hump is 

 now brick-red. Length 6 mm. Duration of this stage seven days. 

 After Third Moult. — No difference from that of the pre- 

 vious moult. Length 10 mm. Duration of this stage six days. 



After Fourth Moult. — Same as the previous one, except 

 somewhat deeper in color and the marking more distinct. Length 

 17 mm. Duration of this stage five days. 



After Fifth, the last Moult. — The head is now bright 

 coral-red, as is also the hump on the ele\'enth segment. Along the 

 dorsal region is a series of six fine black stripes on the whitish 

 ground color, and are broken on the iunction of each segment. 

 Along the subdorsum is a rather broad canary-yellow stripe, and 

 along the sides are four black and yellow, or black and white stripes; 

 the black stripes being the finest. The ground color sometimes 

 assumes a pinkish color. Body beneath dirty white with black 

 markings. The thoracic feet are yellow, and the abdominal legs 

 are concolorous with the body. Length 28 mm. Full grown 42 mm. 

 Duration of this stage nine days. 



