140 



AN IXTR01 



'.ext sub-family. '\\\ LC of Icerya, hov. 



.utifully ribbed, while that of Pulvinari.i is not definite 



.111 introduced insect from Australia. 



AV/; Two species of Rhizoi\h\'n$ ai\ figured on Plate IV. 



I represents A'. ,// pecies infesting Norfolk Island 



pine \Arancaria i.\-it'lsior\ in southern California: and Fii;. j is of 



v.s- upon oak from Florida. This ^enus is a i;ood illustration 



\2(>.Kertnes sj> <s agri/olia. Adult females on stem ; immature males on leaves. 



( From the Author's Rej>ort for 1880.) 



of the forms that spend a greater part of their lives within sacs. A 

 more common illustration of thi^ occurs in the ^c-nus / . of 



which we have a 3] :nm<>n upon a/aleas in * 



.The most abnormal members of this sub-family consti- 

 tute the L^enus Kcrmcs. S] : this ^c-nus are common upon 



