ART. 11!. MASKELL GENERA OF COCCIDAE MORRISON. 25 



devoniensis (Green) as the type of TJiskes. Finally the Fernald 

 Catalogue definitely assigns the subgenus Thekes to Maskell and 

 places eucalypti as the type. The confusion outlined above repre- 

 sents a condition which the writers do not desire to comment on at 

 present, and they have therefore followed the assignment of the type 

 as given in the Fernald Catalogue, as well as its designation of the 

 authorship of the genus. 



The type species is represented in the Maskell collection by four 

 slides, one of "adult female (Australia), 1891," one of "details of 

 female (Australia) , 1891," one of " larvae (Australia) , 1891," and one 

 of " male pupa in sac (Australia) , 1891." In addition there are three 

 separate lots of unmounted material, all bearing No. 205 as the only 

 data connected with them, of which two seem to be E. eucalypti^ while 

 the third represents some other species of the genus Eriococcus^ which 

 we have not attempted to place. 



Adult female. — Sac and external appearance much as described by 

 Maskell ; a brownish color given off by the body when treated with 

 Dotassium hydroxide ; antennae of normal eriococcine form, usually 7, 

 rarely 8-segmented ; legs of normal eriococcine form, hind coxae with 

 numerous pores, mostly on the basal half; spiracles small, not un- 

 usual ; mentum very short and stout, apparently 1-segmented ; derm 

 with numerous small, long-tubular ducts with cup-shaped bases and 

 threadlike continuation, both dorsally and ventrally, some, near the 

 posterior apex and apparently ventral, with flat heavy bases and the 

 threadlike continuation seemingly wanting ; ventrally anterior to the 

 anal lobes with transverse bands of tiny disk pores, apparently quin- 

 quelocular; no pores accompanying the spiracles; derm ventrally 

 with small setae in transverse rows in abdominal region, scattered in 

 thoracic region; dorsally and laterally with numerous very short, 

 conical spines, these approximately uniform in diameter of base, 

 mostly of a peculiar nipple-like shape, tending to become longer and 

 stouter at the margins near the posterior end; anal lobes broad and 

 stout, heavily chitinized in decided contrast to the transparent derm, 

 the inner face strongly notched where two of the spines attach, bear- 

 ing these two stout spines on the inner upper face, one basal, one 

 about the middle, and a third sub-basally and dorsally, a long 

 apical seta, a smaller subapical, and a still smaller basal seta ven- 

 trally; anal ring small, of normal eriococcine type, with eight setae 

 and a double row of pores, the inner row smaller and incomplete. 



Intermediate stage. — Not available for study. 



Larva. — Oval, antennae 6-segmented, legs normal, digitules long 



and slender, slightly knobbed, claw with denticle close to apex ; derm 



dorsally, at least at end of abdomen, with a longitudinal row of 



trilocular pores on each side near margin, and with long-tubular 



3136— 22— Proc.N.M.Vol.ea 30 



