122 
irregularly ovoid eggs are deposited on the under surface of the 
leaves, to which each is attached bv a very short, slender stalk. 
Fig. 15. White-fly, Alcyrndes vaporariornm, nymphs on leaf. 
Twice natural size. (Connecticut Experiment Station.) 
Recently hatciied larvce are flat, oval in outline, and transparent or 
translucent according to age. They settle on the leaf close to the 
empty egg-shells, soon attach themselves, and there remain ( Fig. 
15), molting four times and becoming adult with the last molt. 
The entire life cycle of the white-fly from the time the t^i^ is de- 
Fig. \b. \\h\i^-^y, Alcyrodcsvapr'ra)ioiuni,-A^\\.\\\.i< on lo.if. Twice 
natural size. (Connecticut Experiment Station.) 
posited until the adult emerges, is completed in a month to Ave and 
a half weeks, at the ordinary greenhouse temperature in summer. 
The larv.T and pu])?e secrete a honeydew which falls on the 
leaves below them; and on badly infested plants, where this li(iuid 
