224 COCCUS TOMENTOSUS. 



spines; joints 5 to 10 with two or three long, 

 slender, knobbed hairs; the last joint (fig. 9) has, in 

 addition to the tnberculate spines and knobbed hairs, 

 two or three long stout spines near the apex. Legs 

 with a two- jointed tarsus (fig. 10), the basal joint 

 (fig. 10 a) being extremely short but quite distinctly 

 articulated, which is much more apparent when the 

 tarsus is slightly bent upwards. Wings with the basal 

 portions of the nervures crimson. Eyes and ocelli black. 



Puparium of the male composed of a thick white felted 

 material, elongate, with the ends equally rounded. 



Larva (figs. 11, 12) dark crimson. Legs long, with 

 many spiny hairs ; digitules ordinary. Antennas (fig. 

 13) much shorter than the legs, of six joints, the 

 third and sixth being much the longest; the second 

 the shortest and very narrow. Mentum bimerous. 

 Anal orifice as in the adult female. Dor sum with 

 four longitudinal rows of truncate spines (fig. 14 a), 

 and the margins furnished with spines of the same 

 character ; ventral surface without spines. 



Habitat. On Opuntia fulgida, at the Royal Gardens, 

 Kew. All the specimens were found on a plant 

 recently imported from Arizona, and were probably 

 freshly introduced. The discovery of this species was 

 made in July, 1896, and I then recorded the insect as 

 new to the list of British Coccidse. I have since 

 found,* however, that a species of cochineal was 

 discovered on Cactus cochinillifer, Linn., in the Succu- 

 lent House at Kew in the year 1827, and, judging 

 from the small size of the insect, I do not think that 1 

 shall err in assigning it to this species. The following 

 are the particulars given : " We have been most 

 obligingly favoured by W. T. Aiton, Esq., with a 

 drawing and specimens of the insects (Coccus cacti) 



* Curtis's ' Botanical Magazine/ N. s., vol. i, 2741, 2742, PI. N. 2742s, figs. 

 8-12. The following are the references given to the illustrations: "8. 

 Male cochineal insect (Coccus cacti), natural size. 9. Two of the same 

 magnified. 10. Female insect, natural size. 11. Two of the same magni- 

 fied." 12 shows the flocculent matter natural size in situ on the food-plant. 

 Much interesting matter is added with regard to the commercial history of 

 the cochineal. 



