DactylopiincB. 375 



PSEUDOCOCCUS SCROBICULARUM {Green). 

 (Plate CLII.) 



Dactylopiiis scrobiadarum, Green, hid. Mus. Notes, Vol. IV. No. i, p. 8 (1896). 



Adult female {figs. 2, 3) dark purplish slate colour ; dorsum of thoracic 

 segments dusted lightly with white mealy secretion ; dorsum of abdomen 

 entirely concealed by series of blunt white waxy processes which may be more 

 or less distinct, or may coalesce to form irregular transverse ridges on each 

 segment. The processes are produced into a coarse fringe on the margin. A 

 pair of longish diverging curved strap-shaped processes (with incurved edges) 

 projects from the region of the anal orifice. The venter of the insect is quite 

 naked. Body broadest across the middle, narrowing to a blunt point in front 

 and behind. Segments tumescent, very distinct on the under surface. Antenna 

 {fiS- 5) eight-jointed ; eighth longest, as long as the previous three together ; 

 several stout hairs on each joint. Limbs moderately stout ; tarsus about two- 

 thirds the length of the tibia {fig. 7) ; digitules slender, knobbed. Anal lobes 

 rounded, rather prominent ; each with a longish stout seta on the hinder 

 margin. Anal ring {stt fig. 6) with six long curling setee, which are as long as 

 or longer than those of the anal lobes. Derm with numerous larger circular 

 pores and smaller trilocular pores, and with transverse dorsal series of conical 

 spines across the abdominal segments (see fig. 6). There are no spines on the 

 thoracic segments. Length 175 to 2"25 mm. Breadth ro to r25 mm. 



The insects are concealed within small pits (scrobiculas) at the bases of the 

 veins on the under surface of leaves of Elceocarpiis amoenus {fig. i). Punda- 

 luoya. Their presence can be detected by white waxy tufts which project from 

 the apertures of the scrobiculas. The juices of the living insect are of a rich 

 beet-red colour ; but, after boiling in potash, the tissues assume a bottle-green 

 tint. 



The character of the anal ring and the dermal armature suggest affinity to 

 Erioides cuneiformis and E. rimula. 



PSEUDOCOCCUS CITRI, Risso. 

 (Plate CLIII.) 



Dorthesiacitri, Risso, Essat, Hist. Nat. des Grangers (1813). 

 Pseudococcus adonidu7n, Nietn., Enemies of the Coffee Tree (1861) (not 

 adonidum, Geoff.). 



Lecanium phyllococcus, Ashm., Can. Ent., Vol. XI, p. 160 (1879). 

 Dactylopiiis brevispifius, Targ., Anali di Agr. p. 137 (1881). 

 Dactylopius destructor, Comst., Rep. U.S. Dep. Ag., 1880, p. 342 (1881). 

 Dactylopius citri, Sign., Bull. Soc. Ent. Fr. (6), Vol. IV., p. cl. (1884). 



Adult female {figs. 2, 3) yellowish, pinkish-yellow, purplish, brownish or 

 greyish-yellow above ; usually yellowish beneath. The colour on the dorsum is 



