. The Coccidae of California; a descriptive list of the different scale insects found in and reported from California. Coccidae -- California. FIG. '2. Male of Icerya purchasi crawii. Icepya purchasi maskelli Ckll. Female (after forming ovisac). —Slate gray or very dark purplish gray, sometimes brownish in the middle, with marginal dull orange spots. Back little covered by secretion. More hairy at the cephalic end than crawii. Ovisac not so large as in crawii, tinged with yellow just behind the body of the insect. It is purchasi in the strict sense and agrees very nearly, though not entirely,
. The Coccidae of California; a descriptive list of the different scale insects found in and reported from California. Coccidae -- California. FIG. '2. Male of Icerya purchasi crawii. Icepya purchasi maskelli Ckll. Female (after forming ovisac). —Slate gray or very dark purplish gray, sometimes brownish in the middle, with marginal dull orange spots. Back little covered by secretion. More hairy at the cephalic end than crawii. Ovisac not so large as in crawii, tinged with yellow just behind the body of the insect. It is purchasi in the strict sense and agrees very nearly, though not entirely, with Maskell's description. Food plants: same as I. FIG. 3. Icerya purchasi maslcelli. Females on orange twig. The two species above mentioned are well known to almost every resi- dent of California, and are commonly known as the cottony-cushion scale, the white scale, or the fluted scale. Until the introduction of their natural insect enemy {Novius {^Vedalia^ cardinalis) this pest engaged the attention of our citrus-growers more than any one thing, but within a few short months after its introduction, N. cardinalis had the pest practically controlled and has held it so for many years. To- day it is hard work to find enough of the scale to keep the breeding cases in our Insectary supplied with food. The two species mentioned are usually associated with each other on the same tree. They" may be distinguished in the adult stage, however, as one is a light form and the other Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnes, Edward K; California. State Horticultural Commission. Sacramento, W. W. Shannon
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishersacra, bookyear1906
