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AGRICULTURE OF MAINE. 



"About twenty days after birth the male insect transforms to 

 the true pupa. The true pupa (Fig-. 13 c, d) is pale yellow, 

 darkest about the base of the abdomen. From twenty-four to 

 twenty-six days from birth the males mature. They seem to 

 issue chiefly by night or in the evening. The mature male 

 (Fig. 14) appears as a delicate two-winged fly-like insect." 



"Thirty days from birth the females are full grown and the 

 embryonic young may be seen within their bodies. The adult 

 females, prior to the development of the young, measure i mm. 

 in length and a little less in breadth, and are pale yellow with 

 transparent spots near the margin of the body (Fig. 15). The 

 length of a generation is determined by the females and covers 

 a period of from 33 to 40 days." 



"The fully developed scale of the female is circular, very 

 slightly raised centrally, and varies in diameter from i to 2mm., 

 averaging about i.4nim. The large, well-developed scales are 

 gray, excepting the raised central portion which is of a yellowish 

 color. The mature male scale is oblong-oval, nearly twice as 

 long as wide, and averaging in length about half the diameter 

 of the female scale." 



Fig. 14. Aspidiotus perniciosus; adult male, greatly enlarged. 

 (Howard and Marlatt. Bulletin 62, Div. of Entomology, U. S. 

 Dept. of Agrl.) 



