Maskell. — Oil Coccididae. 31 



parativG slenderness about the latter, to ■svhich the shape of 

 the last joint contributes a good deal. I find this long last 

 joint in Pseudococcus and Blpersia as well as in Dacfi/lopiu.s ; 

 whilst in Orthezia (at least, in my specimens of 0. urticce) it is 

 markedly and excessively long. A student may therefore, I 

 think, have no hesitation in assigning at least to its proper 

 subdivision any insect of the Coccid group from inspection of 

 its antenna. 



In a good many species of Dacttjlojnus I have found the 

 antenna sharply bent between the first and second joints ; but 

 I am not prepared as yet to employ this as an important 

 distinction. 



Passing now to the genus Eriococcus, the figs. 11, 12, and 

 14 of Plate IV. show that there are three antennal forms, and 

 figs. 16 and 17 that there are two forms of marginal spines in 

 that genus. Fig. 14 {Erioc. raithhyi) differs from fig. 11 [E. 

 vmliispinus) only in having seven joints : in both the joints 

 are subequal. But in fig. 12 (E. jMllidus) the third joint is 

 much longer than any of the others. As regards the spines, 

 those of E. ixdUclus and its allies are shown in fig. 16 to be 

 much longer and more slender than those of E. multispinus 

 and its allies, fig. 17. Some species combine the characters 

 of both — e.g., E. p)^'yllocladi (as shown in figs. 3, 4 of the same 

 plate) has the long third joint with the short conical spines. 

 I mentioned these points in my paper of last year : the figures 

 now given will illustrate them. In some species the marginal 

 spines are very small, if not absent — e.g., E. confiisns, or the 

 European E. buxi — but in most they are present and con- 

 spicuous, whether slender or stout. 



Subdivision DACTYLOPID^. 

 Genus Dactylopius, Costa. 



Dactylopius albizzise, sp. nov. Plate YI., figs. 3-10. 



Adult female very dark purple, or perhaps, indeed, deep 

 glossy black, resting on a cushion of snowy- white cotton ; 

 form subglobular, segmented : length about xV^^- Antenna) 

 of sometimes seven, sometimes eight, joints, subequal except 

 the last, w^hich is rather long and fusiform, bearing several 

 shortish hairs. Feet slender, normal : the tibia is very slightly 

 dilated at the end ; upper digitules long fine hairs, lower pair 

 slightly dilated. Mentum rather large, doubtfully trimerous. 

 Anal tubercles very small and inconspicuous, each bearing a 

 seta. Anal ring with six hairs. Epidermis bearing a great 

 number of small circular spinnerets and some slender spiny 

 hairs. 



Larva dull dark-red or purple, covered with scatcered white 

 meal ; elliptical ; active : length about sVn. Antenntc of six 



