62 



I.W'yECTS 1SFESTIN(J THE APPLE TREE. 



FiL'. 16. 



straw color ; sometimes it lias a reddish hue ; it measures from 

 one line to one and a quarter lines in diameter. The scale of 

 the male is oval in outline, and nearly black with the exuvise 

 between the center and the anterior margin of the scale, but is 

 darker in color, and more obscure than that of the female. 



The female insect (Fig. 15), is primrose yellow, and some- 

 times ochre yellow in color, and measures about half a line in 

 diameter. Each female j^roduces from thirty-five to fiftv eo'O's. 

 [Fig. ]."). — San Jose Scale, insect (adult female j 

 enlarged.] 



[Fig. 1(). — Larva of San h)^v 

 Scale,enlarged, ventral vicw.j 



The larvie (Fig. KJ), are yel- 

 lowish, form oval, antennae six 

 jointed, two anal seta% length 

 about one seventy-lifth (1-75) of 

 an inch. The larva creeps around for two or 

 three days, then finding a suitable place it fast- 

 ens itself to the wood (Fig. 17), leaf, or fruit (Fig. IS), and 

 undergoes its change, or metamorphods. 

 [Fig. 17. — Portion of a 

 ^&- ^ ' • 1 )ranch infested by San 

 .Jose Scales.] 



[Fig. 18. — A pear infest- 

 ed by San Jose Scales.] 



The male insect 

 (Fig. 19), (perfect), is 

 Avinged ; Avings nearly 

 transparent — color, body 



(-■jV-'^i light amber, with dark ||;® 

 |V«l[|]!'oi markings; antenna' ten- 

 , ^o'. ** i; jointed (hairy); poste- 

 rior stylet nearly as 

 long as the body. Pupa of male 

 insect (Fig. 20), fifteen days after the scale is formed ; Fig. 21, 

 thirty-five days after the scale is formed. The sting or bite 

 of the female insect jjroduces a dark red mark on the wood 

 or fruit. 



Fig. 18. 



