298 Transactions. — Zoology. 



known and described species of the Monophlebidfe, and must be therefore 

 new. 



5. Eeiococcus, Targioni-Tozzetti. 



I described this genus last year, having then one species of it. Since 

 then I have found another, to which I give the name of 

 Eriococcus hoheriic, sp. nov. 

 Plate VII., figs. 14-20. 



The sac is, as usual, white aud cottony, but for a great part of the year 

 is covered with the black fungus so commonly accompanying Coccidse, so 

 that it looks only Uke a small gall or excrescence on the bark. About mid- 

 summer, individuals may be found which are completing or have just com- 

 pleted their ovisac, which then shows white in the crevices of the bark. 

 Many such sacs are usually clustered together. 



The eggs are very minute, oval, red. 



The young insect (fig. 14) is about -J^ inch long, red in coloiu-, corrugated, 

 tapering from the cephalic to the abdominal extremity, where it ends in two 

 anal tubercles, each bearing a long seta and some hairs. Antennae (fig. 15) 

 of six joints, all nearly equal, with a few hairs, mostly on the last joint. 

 Foot (fig. 16) with tarsus a little longer than the tibia ; digitules all fine 

 hairs, the upper pair rather long, the lower pair about equalling the claw. 



The adult female (fig. 17) is red in colour, about -^-^ inch in length, gene- 

 rally resembling in shape the young insect, and ending in anal tubercles 

 with setse. Antenna (fig. 18) of six joints, somewhat shorter than in the 

 young. Foot (fig. 19) apparently atrophied ; the tibia is very short, and the 

 femur has a swollen appearance ; the digitules are short fine hairs. The 

 anal tubercles (fig. 20) seem at first sight only two; but after maceration in 

 potash are found to be four, of which two bear long setas. All have spiny 

 hairs, and between them is the anal ring with, I think, eight hairs. Eyes 

 very small, black. 



There are some scattered minute hairs on the body, and a number of 

 very small round spinnerets. On the last corrugations, just above the anal 

 tubercles, these spinnerets increase greatly in number and size, and are 

 intermixed with spiny hairs (fig. 20). 



This insect, from the bark of Hoheria, on the hills above Lyttelton, is, I 

 think, new. The genus Eriococmis is not much removed from AcantJwcoccus, 

 Signoret ; and the species of both are somewhat confused. Last year I 

 described, under the names of A. miiUispinus and E. araiicarm, insects 

 which seemed to me to differ from European species ; and so, now, E. 

 hoheriiB differs, I believe, from E. thymi, Signoret ; but it requires some 

 close investigation to distinguish between them ; still, the European species 

 has broad digitules, and a small tubercle at the base of the antenna, which 

 I do not find in my specimens from Lyttelton. 



