80 



tlio tibia and gnidimlly decreases in width until it 'terminates in a] 

 single movable claw, which ends in a sharp point. The two pos- 

 terior pair resemble the anterior in all respects save that they are 

 longer and the difference allready aluded to in the coxa. The colors 

 of the legs are red, the deepest hue is in the centre. 



The abdomen is longer than the thorax and consists of nine 

 segments, the same as that of the female. The integument is co- 

 vered with fine short hairs, at the sides they become longer and 

 project beyond the body. From the first to the sixth segment there 

 is a gradual increase in size, which then as gradually decreases until 

 the ninth and last segment is only one half the width of the eighth. 

 When the male has nearly completed its transformation, from the 

 division of the seventh and eighth segment a pair of thick spines 

 issue, and as the insect matures, they increase in size until in the 

 perfect insect they extend to the end of the ninth segment; these 

 spines are surrounded by two long flexible hairs, twice the length of 

 the spines. When the male first emerges from the cocoon, two long 

 waxy filaments issue from the division of the eighth and ninth seg- 

 ments. They are pure white and longer than the entire insect. 

 I am of the opinion that they consist of a number of filaments united 

 together. These extended filaments are observed only on males who 

 have recently issued from the cocoon, and are soon dropped off when 

 the insect flies about, and become soluble when mounted. 



From the ninth segment projects the penis, this organ is slen- 

 der and slightly curved. The segments of the abilomen are flexible 

 and possess the power of expansion and dilation. 



Habits. The trees from which I have made the study of the Pseu- 

 dococcifs aceris were very badly infested and the number of males 

 compared to the females were nearly equal. When they first emerge 

 from the cocoon they are sluggish, but soon become active and fl.y 

 about the tree with rapidity. They seek the females who have become 

 likewise fully matured and are still wandering about the tree, some of 

 them hiding in the crevices of the trunk while others seek the base 

 of the larger limbs, and when in excessive numbers settle upon the 

 ground at the base of the tree. In these places they partially conceal 

 themselves by a white secretion exuded from the body. There they 

 are sought by the males and at this time the impregnation of the 

 female takes place. Ten days after the first appearance of the 

 male, they liave all disappeared, the probable life of each individual 

 not exceeding two or three days. The mouth parts having become 



