60 Transactions. — Zoology. 



considerably, as usual in the genus, becoming much wrinkled. 

 The ovisac is large, snow-white, irregular, forming a mass of 

 loose cotton behind the insect. The antennae have eight 

 joints, of which the third is the longest, then the second and 

 fourth, then the first and fifth, the last three much the 

 shortest : all the joints bear a few hairs, and there is one on 

 the last much longer than the rest. The feet have a rather 

 arched tarsus : on the inner margin of both tibia and tarsus 

 are a few slender spines ; the trochanter has one very long 

 hair ; the tarsal digitules appear to be wanting, those of the 

 claw being long and rather dilated. Abdominal cleft and lobes 

 normal. The mentum is round and monomerous. 



Female of the second stage, larva, and male not observed. 



Hab. In Sandwich Islands, on Mammea americaua. My 

 specimens are from Mr. Koebele. 



The food-plant of tins species, according to Johnson's 

 " Gardener's Dictionary," is the " mammee apple " of the 

 West Indies and South America. I do not know whether it 

 is indigenous or not in the Sandwich Islands. Mr. Cockerell, 

 in a list of the Coccidae of the neotropical region (Jour, of 

 Trinidad Field Nat. Club, 1894), mentions five species of 

 Pulvinaria, none of which, certainly, is P. mammea. This 

 insect is quite the largest of the genus known to me at 

 present. 



Sub-family COCCI NiE. 



Section ACANTHOCOCCIMh 



Genus Peosopophoea. 



Prosopophora prosopidis sp. nov. Plate VI., figs. 1-4. 



Adult female covered by a waxy test which is subcircular, 

 rather convex, buff-coloured ; diameter averaging about ^in. 

 Surface of the test not quite smooth, but showing very in- 

 distinct traces of small irregular segmentations forming poly- 

 gonal cells on each side of a median indistinctly-raised carina : 

 there is no marginal fringe. No depression is visible on the 

 twig when the insect is removed. There is a small posterior 

 orifice in the test. 



Male pupa covered by a buff-coloui-ed, waxy, elliptical 

 test, of which almost the whole is corrugated like that of the 

 female, but much more distinctly ; at the posterior end is a 

 shelving hinged plate for egress of the insect. Length of the 

 male test about T V U1 - > width about $^in. 



Adult female really red in colour, but under a lens or to 

 the naked eye bluish-purple, being covered with thin white 

 meal ; it fills the test, but shrivels at gestation into a shape- 

 less mass : the proper form is subcircular, convex dorsally, 

 and slightly concave ventrally. Antennae of eight joints of 

 irregular length ; the last always the shortest, and bearing a 



