106 SCIENCE BULLETIN, No. 18. 



Genus XXXVII. Fseudococctis, Signoret. 



Ann. Soc. Ent., France (5), vol. v, p. 329. 1875. 

 Comstock, U.S. Dep. Agric. Report, 1880, p. 345. 

 Newstead, Mon. British Coccidce, vol. ii, p. 176. 1903. 

 Phenacoccus, Cockerell, Eni. News, vol. iv, p. 318. 1893. 

 Paroudablis, Cockerell, The Entomologist, vol. xxxiii, p. 87. 1900. 



The members of this genus are closely related to those of the preceding one. 

 The adult female is a dactylopid coccid with nine- jointed antennae. The 

 male coccid is furnished with four cavidal filaments instead of two, but there 

 is no apparent difference in the larval forms of the two genera. Newstead 

 says : " In the majority of the species the ovisac is very elongated, and 

 composed of white felted or flocculent secretion, in which the female com- 

 pletely envelops herself at the period of parturition. Before the period of 

 the formation of the ovisac, the females are decidedly active." 



Three of our Australian species come into this group. 



Pseuclococcus casuarince, Maskell. 

 Trans. X. Zealand Institute, vol. xxv, p. 235, pi. xv, fig. 5. 1892. 



Type specimens found at Myrniong, Victoria, on an undetermined species 

 of Casuarina. 



The adult female is enveloped in white cottony secretion forming a globular 

 mass, sometimes irregular in form, and hardly a true ovisac. 



The adult coccid yellowish brown, elliptical, slightly convex. Length, 

 1 of an inch. Antennae nine-jointed ; the second longest; the others 

 <liminishing in length to the eighth ; ninth as long as the sixth. Feet long, 

 stout; digitules fine hairs. Anal tubercles very small. Anal ring with six 

 liairs. Epidermis covered with circular spinnerets and fine short hairs ; on 

 the margin of each segment on either side a group of orifices and conical 

 spines. 



398. Phenacoccus casuarince. Cat. Cpccidse, p. 90. 



Pseudococcus nivalis, Maskell. 

 Trans. N. Zealand Institute, vol. xxv, p. 234, pi. xvi, figs. 1-4. 1892. 

 Phenacoccus nivalis, De Charm, Pro. Soc. Amicale Scientique, p 42, pi. iii, figs. 3-3a. 



1899. 

 Phenacoccus nivalis, Cockerell, Check List Coccidce, p. 325. 1896. 



„ „ Cockerell, The Entomologist, vol. xxxiii, p. 86. 1900. 



This species was sent to Maskell, from either Brisbane or Sydney (the 

 texact locality is doubtful) upon an undetermined species of acacia. 



The adult female is covered with white cottony secretion above, but also 

 produces a lighter cottony ovisac, often prolonged behind the insect. Adult 

 female yellowish brown, form elliptical, slightly convex. About ^ of an 

 inch in length. The insect secretes a quantity of white cottony matter 



