Maskell. — On Coccididae. 223 



plate of secretion. Length of test about ^in. The insect 

 escapes by lifting up the posterior end. 



Adult male unknown. 



Hab. In Australia, on Dodoncea bursarifolia and Myo- 

 porum sp. My specimens are from Mr. Tepper. 



The variations in size and colour of this insect render it 

 difficult to identify. Not only is the adult before gestation 

 lighter in colour and much larger than the adult after gesta- 

 tion, but the greenish second stage is not at first sight much 

 like either, and, indeed, has sometimes rather the appearance 

 of some species of Planchonia. However, when a number of 

 individuals are observed in which the commencement of the 

 ovisac can be detected behind the large adults, and when the 

 anatomical characters given above are constant in all stages, 

 the adults and the younger individuals being all mingled 

 together on the plant, it is evident that all are really the same 

 species. 



Pulvinaria psidii, sp. nov. Plate XIII., figs. 10, 11. 



Adult female yellow, or yellowish-brown, sometimes with 

 a greenish tinge ; size variable, reaching yoin. before the ovisac 

 is formed, but shrivelling at gestation. The ovisacs cover the 

 twig or leaf with masses of dirty- white cotton, usually accom- 

 panied by black fungus. Antennae rather long and slender, of 

 eight joints, of which the third is the longest, the eighth next, 

 the rest shorter and subequal. Feet also rather long ; the tro- 

 chanter is large and bears a very long hair ; tarsus curved and 

 about half as long as the tibia ; upper digitules fine hairs, lower 

 pair long and dilated at the end. Abdominal cleft moderate; 

 anogenital ring with several hairs. The margin of the body 

 bears a row of spiny hairs. 



Female of the second stage yellow, flatfish, elliptical ; 

 length about ^jin. Antennas of six joints. 



Larva yellow, flat, elliptical. Antennae of six joints. 



Male unknown. 



Hab. In the Sandwich Islands, on Psidium (guava). My 

 specimens are from Mr. Koebele. 



This species appears to differ in the feet and antennae 



from any of those hitherto described. From the look of the 



twigs and leaves which have been furnished to me I should 



imagine that the insect must be rather damaging; at all 



; events, the masses of greyish ovisacs are very unsightly. 



Genus Signoretia, Targioni. 

 Signoretia luzulae, Dufour. Signoret, Essai, p. 181. 



Plate XIII., figs. 12, 13. 



I have received from Mr. Olliff some specimens which I 

 propose to attach to this species. The adult females are 



