TH-^ OLIVE 105 



of the ego;s and rearing the young, follows, as has been heretofore 

 described. 



THE SECOND GEXERATION. 



The offspring of this second generation appear about the last of 

 August and first of September, and prej)are a nest as did their 

 predecessors, in the bearing boughs of the tree, where they pass the 

 autumn and winter preparing for reproduction in the coming spring. 



The damage from the Phloetribus is considerable. Those of the 

 first generation destroy the blossoms; and those of the second destroy 

 the fruit, as they always attack bearing branches. The drying u]) 

 of the leaves and fruit on the tree may usually be traced to these 

 insects. Since they are reproduced only in the dry branches or 

 those which are perishing, the best method to impede or diminish 

 their propagation consists in keeping the trees j)erfectly free from 

 decayed limbs. As soon as a limb shows signs of languor it should 

 be removed and burned. 



HYLESINUS OLEIPERDA. 



{See Bate X,) 



This injurious insect is designated by various names in as many 

 localities. In organization and habits it bears a close resemblance 

 to the Phloetribus. Indeed the egg, larva, chrysalis and insect are 

 nearly identical in form and size. (Fig. 4, 5, 6, 7.) 



The larva in this case being a trifle larger and the antennae of 

 the insect having eleven joints instead of nine. The fundamental 

 color of the insect is lio;hter than that of its thorax. The bodv is a 

 twelfth of an inch in length. Before the middle of July the 

 Hylesinus has reached its perfect development, and from this time 

 on, its methods are precisely those of the Phloetribus, and its treat- 

 ment should be the same. 



THE POLYCAOX CONFERTUS. 



This insect is the common twig borer of California^ and similar 

 to that found on the oak tree. It attacks the olive early in April, 



