A ORCHARD PLANT LICE 35 
ignated by the various names given above along with others that 
we have not mentioned. 
This insect, then spends the winter, either as wingless lice upon 
succulent vegetables where there is sufficient protection to enable 
them to endure the cold weather, or in the egg stage upon certain 
trees, chiefly the peach, plum, apricot, nectarine and cherry. 
The eggs are shining black in color and are deposited in the 
axils of the buds for the most part, but some occur in crevices of 
the bark. The eggs hatch very early in the spring so that the 
young stem-mothers (Fig. 5) from them are often almost fully 
grown before the earliest peach or plum blossoms open. About 
the time the buds begin to open upon these trees, the stem-mothers 
are all of a deep pink color and begin giving birth to living young. 
These young (Fig. 6) instead of being pink like their mothers are 
pale yellowish green throughout their lives, and usually there is a 
median and two lateral dark green stripes passing over the abdo¬ 
men. Very few of this brood attain wings. The third generation 
become very largely winged (Fig. 8) and begin leaving the trees 
upon which they were born about the middle of May in the peach 
growing sections of the state. By the middle of June these lice 
have almost completely left the trees and may be found establishing 
their colonies upon various succulent vegetables, a list of which is 
given below. At this date, (Aug. i, ’o8) this louse in the insectary, 
bred directly from specimens taken from the peach in Fort Collins, 
June 20, are all apterous and the body color is a uniform pale yel¬ 
low without green markings. 
ROOD PLANTS 
The plants upon which we have found this louse establishing 
colonies in Colorado are as follows: 
IN GREENHOUSE 
Snapdragon (Antirrhinum sp.) 
Carnation (Diantlius sp.) 
Potato (Solanum tuberosum) 
Radish (Raphanus sativus) 
Alternanthera. 
Calla lily (Richardia Africana). 
Uilium candidum. 
Tulip (Tulipa sp.) 
Cauliflower (Brassica oleracea). 
Lactuca spicata. 
Turnip (Brassica rapa). 
Tobacco (Nicotiana Tahacum). 
Eg'g-plant (Solanum Melongena). 
Amaranthus sp. 
Chenopodium album. 
Water Cress (Roxipa Nasturtium). 
Asparagus fern (Asparagus sp.) 
Nasturtium (Tropaeolum majus). 
Red Clover (Trifolium pratense). 
White clover (Trifolium repens). 
Verbena sp. 
Russian thistle (Salsola tragus). 
Cotton (Gossypimn lierbacemn). 
Box-elder (Rulac negundo). 
Snowball (Viburnum opulus). 
Apple (Pyrus malus). 
Wheat (Triticmn sativum). 
Grass (Poa sp.) 
Corn (Zea sp.) 
Willow (Salix sp.) ^ 
Castor bean (Ricinus eommmiis). 
Cineraria sp. 
Pot Marigold (Calendula officinalis). 
Fetid Marigold (Drysodia sp.). 
Digitalis purpurea. 
Primula Forbesi. 
Stcllaria media. 
Iresine lindeni (Achyranthes). 
Tomato (Uycopersicum esculentmn). 
