20 INSECTS AFFECTING THE ORANGE. 



The Scale of the Female is brownish, about 3 mm (ffe inch) in length, and 

 less than one-fourth as wide; there is, however, great variation in size, 

 and dwarfed or malformed scales are numerous. When crowded the 

 scales are apt to be warped and curved, although normally they are 

 straight. 



The Scale of the Male is much smaller than that of the female, quite 

 uniformly l mm (Y- O - inch) in length, and very seldom curved. 



The colors, varying shades of brown, are lighter, and incline to yel- 

 low in the males and young, but become dark mahogany-brown in the 

 older females. The brighter color of the forming scales gives warning 

 of the increase of the pest, and to a practiced eye discloses the age and 

 progress of the brood, even when scattered or mingled with the debris 

 of former broods. 



In the aggregate, the scales, when densely clustered, have a reddish 

 hue, which has caused this species to be known in some localities as the 

 << Bed Scale." 



Female Coccid. The body is an elongate, flattened sack, rounded at 

 the extremities and divided into segments or joints. The posterior 

 segment is bordered with spines and plates of microscopic fineness. Dur- 

 ing the growth of the insect this segment is the widest portion of the 

 body, and upon its surface, as upon a trowel, are laid the successive 

 additions to the scale. After impregnation it loses its prominence, 

 through the swelling of the intermediate joints of the body. 



The young and growing females are translucent, waxy white, with 

 the thin outer edge of the last joint yellowish (chitinous). As they grow 

 olde"r, they are tinged with amethyst, and toward the end of their lives 

 become dark purple in color. 



The adult female is 1.3 mm (&$ inch) in length. Its sucking beak con- 

 siderably exceeds the body in length. The structural details are given 

 in the Report of the Commissioner of Agriculture for 1880, page 323. 



Male Coccid. The male is a minute fly, T ^ inch in length. Its body is 



JFlG. Z.Mytilaspix gloverii (Pack.), male. (A fter Comstock.) 



pale pink in color, and three or four times as long as wide. The differ- 

 ent joints *of which it is composed are very closely united, but are indi- 



