DACTYLOP1INJE. 149 



orifice resembling those in the adult insect. In the 

 aberrant genus Gryptococcus (PI. LXX, fig. 7) there 

 are only five joints to the antennae, and four spiny 

 hairs to the anal orifice ; while the larva of Aptero- 

 coccus (PL LXXII, fig. 10) is distinguished by the 

 rows of truncate spines on the dorsum. 



SYNOPSIS OF GENERA. 



A. Adult females stationary, enclosed in a glassy or 



horny, fringed ovisac (test). 



(l) . . ASTEROLECANIUM (1). 



B. Adult females active, covered with mealy secretion, 



not enclosed in ovisac. 

 a. Female antennas of eight joints. 



(n) . . . DACTYLOPIUS (2). 



BB. Adult females enclosed within ovisac at gestation. 



a. Female antennae of nine joints. 



(in) . . . PSEUDOCOCCUS (3). 



/>. Female antennae of six, rarely of five or seven 

 joints. 



(iv) . . . RIPEESIA (4). 



C. Adult females stationary, living from the earliest 



stage within the ovisac; antennae and legs 

 rudimentary or absent. 



<i. Anal orifice of adult female with four spiny hairs, 

 (v) . . . CRYPTOCOCCUS (9). 



b. Anal orifice of adult female with six long hairs. 



(vi) . . . ANTONINA (7). 



CC. Antennae and legs present; anal orifice with six 

 flattened hairs. 



(vn) . . . APTEROCOCCUS (8). 



D. Anal lobes of adult female very large ; body with 



long marginal or dorsal spines. 



(vni) . . . ERIOCOCCUS (5). 



E. Body of adult female with numerous short conical 



spines. 



(ix) . . . G-YMNOCOCCUS (6). 



