1895.] 



235 



9 early adult lins tho grouped spinnerets well developed, as in the old adult; 

 but the marginal appendages of the pygidium (fig. 2) are very different. Many 

 examples in this stage were badly infested withyun^j, which had either arrested the 

 development, or distorted the marginal appendages (fig. 3) to such an extent, that 

 had they (as also the perfect specimens) been examined separately, they might have 

 been considered distinct species. It is hardly necessary here to give a detailed de- 

 scription of these specimens, the figures alone will suffice. At the same time it is 

 important to note the variation of form between the early and old adult and those 

 infested with funffi. 



Tho early adults are about the size of Ch. fraxini, Sign. The old adults are 

 very much larger than any species I have seen hitherto, and in other respects this 

 seems a clearly distinct species. 



Hah. : on Nerium. oleander, L. Coiistantine, and Biskra Marsh, 

 Algeria. June, 1891, and March, 1895. Collected by the Rev. A. E. 

 Eaton. 



Although this and the preceding species were not sent to me 

 direct, I take this opportunity of expressing my gratitude to Mr. 

 Eaton for kindly forwarding the specimens, and trust that others, 

 equally interesting, await his discovery. 



Dactylopius kadicum, n. sp. 

 ? adult subterranean, pale reddish-pink, very elongate, broad, ends equally and 

 gradually narrowed. Antennm of 7 joints (fig. 1) ; 1,2 and 3 in length equal ; 4, 5 

 and 6 shorter, the latter a little the longest ; 7 longest, as long as 1 and 2 together ; 

 all the joints with many fine hairs. Mentum biarticulate, apical joint very short, 

 with many fine hairs at margins ; filaments very short, not reaching much beyond 

 intermediate legs. Legs short ; tarsi much shorter than tibiae ; digitules to claw 



and tarsi simple. Anal ring of six hairs and three 

 rows of almost circular discs. Anal lobes only 

 indicated by a single long hair. Dermis with 

 numerous fine scattered hairs and very small discs ; 

 the hairs in front longer and more numerous. In 

 addition to the " small discs " arc a great number 

 of large curiously shaped pores or glands (figs. 2), 

 irregularly placed, and having the central portion 

 darker and stronger than the rest. 



Long, 2 — 3, wide, I — lo mm. 



At period of gestation the ? completely envelopes herself in a very loose 

 cottony material, in which the pale flesh-coloured ova are laid. 



? second stage pure white (greenish-yellow after treatment with potash). Seg- 

 ments distinct. Anal segment with two white waxen appendages. Antennffi(fig. 3) 

 of 6 joints ; 1 and 6 longest ; 2 shortest ; 3, 4 and 5 nearly equal, 3 longest ; all 

 with fine hairs. Mentum long, biarticulate, with about four rather long hairs on 

 either side at apex ; unexpanded filaments reaching insertion of intermediate legs. 

 Legs short ; tibice and tarsi about equal, each with two strong spines beneath. Anal 

 ring with six hairs. Anal lobes very minute, with a single long hair surrounded by 



