PSEUDOCOCCUS ACERIS. 177 



Pulmnaria ribesiae, Doug., 3 only; Ent. Mo. Mag., 



s.s., vol. i, p. 240, fig. 3 (1890). 

 Pseudococcus socius, Newstead; Ent. Mo. Mag., s.s., 



vol. iii, p. 144, pi. ii, figs. 5-5 c (1892). 

 Nee Pseudococcus aceris, Howard; Insect Life, vol. vii, 



p. 235, figs. 23, 24 (1895). 

 Phenacoccus (Paroudablis) socius (Newst.), Cockerell; 



Entomologist, vol. xxxiii, p. 87 (1900). 



Adult female (fig. 1) ovate ; pale bottle-green or 

 greenish-yellow, rarely pale brown or brown-pink ; 

 legs and antennae pale yellow-brown or brown ; seg- 

 mentation distinct ; mealy, with the extremely short 

 waxen appendages at the sides often confluent and 

 indistinct, but those at the posterior extremity are 

 usually conspicuous. Antennae (figs. 2, 2 a) of nine 

 joints; the second is usually the longest, then the third 

 and the ninth ; the latter and the preceding joint are 

 usually continuous in outline, or with very little con- 

 striction at the articulation (fig. 1 ) ; this form may be 

 considered normal, but some individuals have the ninth 

 joint dilated and widely rounded at the apex (fig. 2 a), 

 and not acuminate as in fig. 2. All the joints have 

 long slender hairs, but the hairs on the form with the 

 dilated ninth joint are shorter and fewer than those 

 on the normal antennae. Legs slightly longer than 

 the antennae, hairy ; tibia about one- third the length 

 of the tarsus ; claw (fig. 3) rather long and toothed 

 on the underside towards the apex ; digitules to claw 

 long and dilated ; those of the tarsi represented by 

 rather short simple hairs. Mentum almost triangular 

 in outline ; articulation nearly central ; there are two 

 hairs on the broad basal joint, and several unusually 

 long ones on the apical joint. Eyes (fig. 5) truncated, 

 strongly chitinised at the sides. Anal segment (fig. 4) 

 with the lobes clearly indicated but not prominent ; 

 each with three hairs of successively increased length, 

 and several shorter ones ; and there is a conspicuous 

 group of spinnerets surrounding the base of the hairs. 



VOL. II. 12 



