390 



BOARD OF AGRICULTURE. [Pub. Doc. 



the peach and apple is quite obscured when these trees are 

 thickly infested, and they then have the appearance of being 

 coated with lime or ashes. When the scales are crushed a 

 yellowish liquid appears, resulting from the crushing of 

 the soft, yellow insect beneath, which indicates the existence 

 of living scales on the trees. 



These scales are often found on the fruit (Fig. 1), and 

 when present in large numbers they prevent the full devel- 

 opment of the fruit, causing it to crack or fall from the tree, 

 or render it unsalable. 



The mature male is very small, and supplied with two 

 well-developed wings. It is shown greatly enlarged in Fig. 



Fig. 4. — a. Young larva of San Jose scale Insect, under side, greatly enlarged, b. Antenna 



still more enlarged. 



3, the natural size being indicated by the crossed lines in 

 the small circle below the risrht wins:. 



Early in June, in this State, the young crawl out from 

 beneath the scale and spread over the trees. They appear 

 like moving points of a yellowish color, and it is very diffi- 

 cult to distinguish them with the unaided eye. Fig. 4 repre- 

 sents the insect at this stage of its existence very much 

 enlarged, with its three pairs of legs and one pair of antennae 

 (one of which is still more enlarged at b), while its long, 



