IN NEW MEXICO. 



about midway their length on lateral margin, and often bearing a 

 slight second marginal notch near tip. Second pair notched once 

 on lateral margin. 



Scale of Male. Smaller, quite different in appearance, being 

 somewhat elongated instead of circular, blackish in color, and with 

 the exuvia between the center and the anterior margin. 



^99' According to Comstock,the eggs are white ; but according 

 to my own observation, they turn to an orange-yellow color in the 

 spring. They hatch here about the first or second week in May. 



Food-plants. Found here on apple, pear, plum, peach, quince, 

 and rose. Attacks bark, leaves, and fruit. It has not yet occurred 

 here on the apricot, but has been reported on this fruit in Califor- 

 nia. It also infests the cherry; in fact, all the deciduous fruits 

 are liable to its attacks. 



- This species is also known as the pernicious scale, and has been 

 brought into New Mexico on young trees from California. It was 

 first noticed as injurious in San Jose, whence the popular name. In 

 California, it has proven to be the most destructive scale known on 

 deciduous fruits, and also the most difficult to kill. It spreads 

 rapidly. 



A reliable characteristic by which this scale may be recognized, 

 when numerous, consists in the red discoloration of the bark occa- 

 sioned by its attacks. The discoloration appears in reddish blotches 

 over the bark, and when the latter is badly infested, extends through 

 the bark and into the sapwood. It seems that the weather during 

 the past winter has had some effect on the scales, many of them ap- 

 pearing winter-killed. 



Parasites. Three species of minute hymenopterous parasites of 

 this scale are known in California. They are : 



Aphelinus myUlaspidis Le Baron (Plate I, fig. 4) : This is a little 

 four- winged fly, the female of which is about 0.64 of a millimeter in 

 length, with a wing expanse of 1.28 mm. Its general color is bright 

 lemon-yellow; the base of the antennae or feelers is more or less dusky, 

 the eyes blackish, the ocelli or simple eyes carmine, mandibles or 



