198 ERIOCOCCUS. 



never been able to keep them under observation for 

 more than a few days. Nor have I been able to 

 discover a male in any stage. 



SYNOPSIS OF SPECIES. 



A. Antennas of adult female with six joints. 



a. Spines at margins only. 



(i) .... INSIONTS. 



b. Spines almost covering dor sum. 



(ll) .... GREENI. 



B. Antennas of adult female with seven joints. 



(ill) . . . DEVONIEXSIS. 



ERIOCOCCUS INSIGNIS (Newstead) . 

 (PL LXXI, figs. 1-8.) 



Eriococcus insignis, Newstead ; Ent. Mo. Mag., s.s., 

 vol. ii, p. 164, pi. ii, figs. 5-56 (1891). 



Adult female, after treatment with potash (fig. 3), 

 elongate; margins with long, stout, equidistant, and 

 closely-set spines (fig. 7), which are pointed and 

 apparently hollow, and very probably serve as secret- 

 ing organs, as in similar spines or " plates " in the 

 Diaspinse. Dermis above with fine slender hairs and 

 numerous large circular spinnerets (fig. 8). Anal 

 lobes (fig. 5) normal, each bearing a single long hair, 

 two short ones, and one or more spines. Anal orifice 

 (fig. 5) with eight very long hairs ; the " ring " is 

 punctate. Legs long ; tibias and tarsi (fig. 6) equal in 

 length ; digitules to claw and tarsi ordinary. Antennae 

 (fig. 4) short, of six or seven joints, usually six, the 

 third being nearly as long as the rest together ; those 

 possessing seven joints have the long third joint divided 

 in the centre; normal formula 3 (2, 6), 1 (4, 5). 



