202 
ong the xd niani trees upon which : ees Hs cannot thrive, 
and upon which it does not occur when they are grown at some distance 
from infested rii or Citrus trees, are the following i "Pines, Cypress, 
Eucalyptus, Olive, Apricot, Peach, Pea r, and Oleander 
The plants upon which Mr. Coquillett found females with egg-masses 
in limited numbers, and which were growing in situations so remote 
from any infested Acacia or Citrus trees as to preclude the idea that the 
adult iia had found their way to these plants from such trees, were 
as follow: 
Punishes iata, Quince, Apple, Peach, Apricot, Fig, Walnut, Locust, 
Willow, Pepper, Grape, Rose, Castor-be ean, Spearmint, Rose-geranium 
Mr. | 
in the adult state. Only a few scales, and these nearly always small, 
were found upon the Castor-oil bean. Some Pecan trees were noticed 
on which some of the branches were completely covered with scales. A 
Willow hedge surrounded by plants which had been infested for over 
two years did not itself become attacked until the past summer. The 
Fig he states to be a favourite food-plant. On Eucalyptus he found 
young scales all summer, and in Cetober he found twigs full of scales 
of all sizes. A few full-grown individuals were found upon a single 
Pepper tree ae eines growing in the orchard. The fo llowing is 
a supplementary list of plants upon which Mr. Koebele reported the 
scales most noticas able: — 
etre Metus or numerous, Malva rotundifolia, 
Grape (Vitis spp.)—scales rring principally on petiole and leaf, 
Medic vsi dent eee Helianthus spp., Rose (Rosa spp.)—scales grow- 
ing often to an unusually large size, an very numerous on some varieties, 
Epilobium e color vend rigeron canadensis, Bidens pilosa, Artemisia 
ludoviciana, Am a pstlostachya—hundreds of scales on each plant 
during July, Angust, and September, Sonchus oleraceus, Pauline Spp-, 
Mentha piperita, Stachys cequata, Solanum tuberosum, Solanum 
Douglasii, Chenopodium murale, Chenopodium album, Amarantus 
itd " 
the seales developed with unusual rapidity me *s nid size, Carex spp., 
Paspalum $003 Panicum crus-galli, 
CHARACTERS AND Lire History, 
The genus /cerya was first described by Signoret in the “ Annales de 
la Société Entomologique de France ” for. 1875, pp. 351, 352, and was 
the Island of Bourbon. He knew only two stages, the 
-grown female and the newly-hatched larva, but these were described 
with his customary care, 
Mr. Maskell, in describing the species under consideration, places it 
without much hesitation in this genus, and later, in 1883, still places 
it in Icerya, after examining specimens of J. sacchari sent him by 
M. Signoret. In his original paper (Trans. Proc, N.Z, Inst, 1878, 
220), Mr. Maskell describes quite carefully the egg, bd young larva, 
the second em pi the ae a female, but had n 
~ lava, cocoon, or Professor Comstock (Ann. Rept. "Dept t. of Agric., 
1886, p 34 » p. E hk Maskell’s description quite closely, ai introduces 
