DactylopimcE. 391 



The insects, of both sexes, are crowded on the under surface of the leaves. 

 On a single leaflet of Cajanus, scarcely an inch long, thirty-two fully developed 

 female ovisacs were counted. Sometimes the male puparia are present in 

 enormously preponderating numbers. The long narrow ovisac, with the 

 female resting at its extremity, gives it a strong resemblance to a species of 

 Pulvinaria. 



Signoret erected a genus — Boisdnvallia—iox species having all the cha- 

 racters of Dactylopius, but ' presenting four filaments at the extremity of the 

 abdomen of the male.' The two species {lauri and qiiadricaudaia) that he 

 designates under his new genus have eight-jointed antennae in the female. 



Attention should be drawn to an error in the origmal description of this 

 species {loc, di.), where it is wrongly stated that the median dorsal series of 

 tubercles is absent on the abdominal segments. 



PHENACOCCUS ICERYOIDES, Green. 

 (Plate CLXII.) 



Phenacoccus iceryoides, Green, Me7n. Dep. Ag. Ind., Ent. Ser., Vol. II. (2), 

 p. 26 (1908). 



Dactylopius obiiistis, Newstead, Mitt. Zool. Mus. Berlin, Vol. V. (2), p. 164 

 (1911). 



The adult female secretes a large, highly convex, but comparatively short 

 white ovisac ; the insect tilted into an erect position and resting upon the 

 anterior part of the ovisac {figs, i, 2). The ovisac itself is very delicately fluted 

 longitudinally. 



The female, before oviposition, is of an oval form {fig. 3), flattish or mode- 

 rately convex ; densely covered with white meal, which is produced into a 

 more or less conspicuous series of prominences on the median line. After 

 oviposition, these dorsal processes become obsolete. Margin with a complete 

 fringe of contiguous white (or slightly brownish) waxy conical processes, 

 which are broadly dilated and flattened on the thoracic area but subcylindrical 

 on the abdominal area, the terminal processes slightly longer. Under parts 

 and limbs honey-yellow. In early adult examples {fig. 4) the fringe is 

 almost continuous and may have two or three pale brownish lines running 

 through it. Eyes very prominent (see fig. 5). Antenna {fig. 6) long and 

 slender, nine-jointed ; first about as long as it is broad, third usually longest 

 but occasionally equalled by second, remainder subequal but gradually 

 decreasing in length to the eighth, ninth usually slightly longer ; all the joints 

 with a few slender hairs which are longer on the first and second joints. Legs 

 rather slender ; tarsus approximately half length of tibia ; claw stout, a well- 

 defined denticle on its inner edge at about one-third from the tip ; tarsal digi- 

 tules slender, simple ; ungual digitules slightly dilated at extremity {see. fig. 7). 

 Margins of segments slightly protuberant, each prominence with a group of 

 about twenty stout bluntly-pointed or truncate spines (see figs. 5, 8). Some 

 looser groups of similar spines on the dorsum, in the positions occupied by the 



