West Australia7i Coccidse. 439 



COCCINiE. 

 Genus Coccus, Linne. 



5. Coccus acacia, Maskell. 



This insect occurs on Acacia pulchella and another small 

 " wattle " much resembling it. I think I may safely say that 

 it is the prettiest and most highly coloured Coccid that 

 I have ever seen, vying in brilliancy with the gaudy 

 ChrysomelidcV. Maskell's description having been made 

 from dried material, the following colour notes from living 

 insects are added : — 



Adult 9 very convex, almost globose, slightly elongate behind. 

 Dorsum shining and distinctly segmented, ornamented with lour 

 longitudinal rows of vermilion, and five rows of lemon-yellow spots. 

 The spots are upon each segment and are separated by transverse bars 

 of shining black, which occur in the constrictions. The median line 

 consists of small yellow spots ; on either side are large red spots, and 

 beyond these a wider row of yellow ones ; the spots in the remaining 

 rows are much smaller. The transverse bars of black, lying in the 

 constrictions, are not of even breadth, but are narrowed at several 

 intervals, the red spots being sometimes confluent. Length 0"13 inch. 



Genus Eriococcus, Targioni-Tozzetti. 



6. Eriococcus agonis, sp. n. 



$ sac of apparently a loose texture, the accumulation of fumagine 

 being always so thick that the colour and true nature are quite 

 obscured. 



Adult 9 elongate, convex, segmented ; colour purple ; length 0-06 

 inch. Antennse tapering, 7-jointed ; 7 the longest, 2 and 3 sub-equal 

 and next in size ; 7 is constricted and occasionally appears as two 

 joints ; sequence 7 (2, 3) (1, 4) (5, 6). Mentum elongate-cordate, 

 trimerous. Tarsus twice the length of tibia, digitules normal. Anal 

 tubercles normal with 5 spines on each, one on either side of the apex 

 and 3 at the base ; the spine upon the inner margin is very con- 

 spicuous and thorn-like ; apex of tubercle with a long spine. Anal 

 ring probably 8-haired. There are a very few inconspicuous spines 

 on the dorsum and two upon the margins of each segment. 

 On Agouis jiexuosa ("Native Peppermint"). 



7. Eriococcus apioynorphm, sp. n. (Plate XV, fig. 8.) 

 $ sac white, thick, complete, very convex ; contour elliptical ; 

 length 0-2, width O'l, height O'l inch. 



