132 



THE MICROSCOPE. 



Sept. 



quince. As is the case with the piecediug species the 

 female scale, if lifted in the winter, will reveal the 

 shriveled body of the insect in front and a mass of eggs 

 behind. The eggs, however, instead of being yellowish 

 in color, ?is in the Oyster Shell Bark Louse are purplish- 

 red, and number from 10 to 75 in each scale. They 

 hatch about the middle of May. The life-history of this 

 insect is substantially the same as in the foregoing 



dliionaspis furfiiriis: Adult male fioiii above ; b, foot; li, tip of autouiui; ofBaiiie; o, Uiiva ; il, 

 aiiteiiiiM' ; e, leg of same ; f, pupa; g, ailult female removed from scale — all enlarged ; b, d, e, li, 

 nimli mure than the others. 



species. The male insect, however differs quite radically 

 in the character of the scale which it forms. This scale, 

 instead of resembling that of the female in color and 

 general shape, is very much smaller, brilliantly white, 

 rather delicate, having nearly parallel sides and three 

 elevated longitudinal ridges, one on each side and one in 

 the centre. At the anterior end the yellowish-brown 



