136 Transactions. — ^Zoology. 



2. EJiizococcus fossor, sp. uov. 

 Figs. 36-38. 



Adult female (fig. 36) greenish yellow in colour, sometimes brown, 

 almost circular in outline, flat beneath and slightly convex above : length 

 about -^j inch. In the last stage, after gestation it becomes dark brown. 

 The cephalic part is smooth ; the remainder segmented. The abdomen 

 ends in two very small anal tubercles, which are nevertheless somewhat 

 conspicuous on account of their brown colour. Between them there 

 protudes a long thick pencil of white cotton, which is resolvable into six. 

 Antennae (fig. 37) short, with six joints, the last joint bearing several long 

 hairs. Feet very small ; the femur rather thick : the tibia is shorter than 

 the tarsus by about one-third : the four digitules are long fine hairs. The anal 

 tubercles have not terminal setae ; and I can only make out four hairs on 

 the anal ring. A row of a few conical spines, set far apart, runs round the 

 edge of the body, but I can see none elsewhere, nor any circular spinnerets. 

 There is no sign of a sac in any stage. 



In the second stage the insect is oval, flatter than the adult, and of a 

 rich golden colour : length about -^ inch. The segments of the body are 

 somewhat more distinct than in the adult. The anal tubercles are pro- 

 portionately larger, and bear terminal setae. Antennae longer than in the 

 adult, with six joints. Feet also longer. All round the edge runs a row 

 of conical spines, set more closely than in the adult ; and from each of 

 these springs a long curly tube of white cotton, making a kind of fringe to 

 the body; each tube is a little dilated at the end, and then tapers to a narrow 

 point (fig. 38). The base of each conical spine is a somewhat large tubercle. 



The young insect has the general form of the young Eriococcus hoheria; : 

 colour yellow ; length about -^ inch. Antennas as in adult, with six joints. 

 The feet are somewhat large. Anal tubercles thick, bearing a terminal 

 seta and one shorter hair. Along the edge of the body is the usual row of 

 conical spines, set somewhat far apart, and four other longitudinal rows are 

 seen on the surface. The mentum is large and, I think, di-merous. 



This insect is viviparous. The females are often full of young larvae, 

 and, as these are born, they are sheltered in a cavity beneath the mother, 

 as in some of the Lecanidae. They do not remain there long, but soon 

 begin their travels, and move rapidly. 



The male insect is red in colour, about -^ inch in length, undergoing 

 its last transformation in a minute, white, cottony, oval sac. Antennae of 

 nine joints : the first two short and thick, the third very long and slender, 

 the fourth, fifth, sixth, and seventh about half as long as the third, thicker 

 and rounder, the eighth rather shorter, and the ninth very short and 

 nearly globular. All the joints have hairs. Legs slender : the tarsus 



