148 DACTYLOPIINJE. 



so thickly packed together as to completely cover the 

 bark of the tree. Eriococcus (PI. LXXI, figs. 1, la) 

 makes a neat and very closely felted sac provided with 

 a small orifice at the anal extremity for the exit of the 

 larvae. The members of the genus Aster olecanium 

 (PI. LXI) are easily distinguished by the hard, semi- 

 transparent, and fringed ovisac, which, like that of 

 Eriococcus, is also provided with an opening at the 

 anal extremity for the escape of the larvae. 



MALE. 



The chief characteristic of the males of the British 

 genera is the comparatively short and somewhat com- 

 plex structure of the genital armature. Whether we 

 take the closely allied genera Dactylopius (PL LXIV, 

 fig. 8) and Pseudococcus (PI. LXIII, figs. 8, 8 a), or 

 the extremely aberrant genus Apterococcus, we find the 

 general character of the genitalia much the same in all 

 three. In the comparatively few descriptions of the 

 exotic species which I have seen the same characters 

 seem to prevail. But in the incomplete state of our 

 knowledge of these organs little importance can at 

 present be attached to them in the classification of the 

 Coccidae. Both winged and apterous species occur in 

 this division, but the former are much more frequent 

 than the latter. 



MALE PUPAEIUM. 



The puparia are usually felted (PI. LXVII, figs. 

 11, 12), but mAsterolecanium they are semi-transparent, 

 and, although much smaller, they closely resemble the 

 ovisacs of the adult females. 



LAEVA. 



Typical larvae (PL LXVI, fig. 1 ; PL LXVIII, fig. 8) 

 possess six- jointed antennae, the anal lobes and anal 



