210 APTEBOCOCCUS. 



of several genera of coccids are known, but none, I 

 believe, are so imperfectly developed as are tliose of 

 Apterococcus fraxini. The cephalic, thoracic, and abdo- 

 minal segments of this insect are only indicated by the 

 faintest lines, which, taken together with the short, 

 abnormal antenna3, give it much the appearance of a 

 coccid larva, for which I mistook the insect when I 

 first discovered it. 



APTEKOCOCCUS FBAXINI* (Newstead). 

 (PL C, fig. 2, Vol. I ; PI. LXXII, figs. 1-13.) 



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

 vol. ii, p. 165, pi. ii, figs. 6-6 b (1891). 



Ripersia fraxini, id., op. c., s.s., vol. iii, p. 147 (1892) ; 

 s.s., vol. vii, p. 57, figs. 1-4 (1896). 



Adult female bright red, or orange-red ; more or less 

 globular. Antennae (PI. LXXII, fig. 2) of six joints, 

 each, except the first, with a broad segment of chitin, 

 the articulations being clear and often very broad; 

 first segment narrowly chitinised at the base, but 

 owing to its comparatively flexible nature its true 

 character is not easily traced ; formula slightly vari- 

 able, but usually (1, 6), 2, 3, 4, 5. There is a short 

 spiny hair on the fourth, fifth, and sixth joints, and the 

 last one bears also four very long hairs, and there are 

 extremely minute hairs on the first, second, and third 

 joints. Legs (PL LXXII, fig. 3) short, being a very 

 little longer than the antennas. Anal extremity 

 (PL LXXII, fig. 4) with the anal lobes indicated by a 

 single long hair, and between them, on the margin, are 

 two pairs of spines. Anal ring with six hairs arranged 

 in a semicircle, slightly posterior to the inner " ring." 

 Dermis with numerous long tubular spinnerets (PL 

 LXXII, fig. 5), a few circular spinnerets, and short 

 spiny hairs, the hairs forming transverse lines on the 



* See Appendix. 



