ABT. 12. MASKELL GENERA OF COCCIDAE MORRISON. 19 



stage and the adult female, both of which occur within the gall. 

 The following descriptive notes are directly supplementary to Has- 

 kell's extended description: 



Adult female. — Of a peculiar disk-like shape, with slender tail- 

 like abdomen; derm clearing completely when boiled in potassium 

 hydroxide; antennae not wanting, but represented by minute cones, 

 placed anterior to the strongly developed framework of the mouth 

 parts; no traces of legs observed; derm with three types of gland 

 pores, at least dorsally; with long, slender, tubular ducts angulate 

 near bottom, with large multilocular disk pores, these, so far as 

 noted, all quinquelocular, and with smaller, broad, somewhat obscure 

 8-shaped gland pores set in the bottom of a short tube, all these 

 types more or less localized, but the arrangement not determinable 

 due to distortion of the body on mounting ; the first two types appear- 

 ing very numerous and closely crowded before the development of 

 the eggs, but much more widely scattered after the stretching of the 

 derm due to egg development ; ventrally probably with only the tiny 

 8-shaped pores, except for multilocular disk pores in the spiracular 

 region; derm setae small, fairly stout, scattered in the head and 

 thoracic regions, becoming very much larger and arranged in trans- 

 verse rows in the middle of the "tail" and then quite small and 

 spiny at its apex ; gland pores apparently entirely lacking through- 

 out most of the " tail " ; anal ring represented by a chitinized tube 

 without setae, opening a short distance before the apex of the " tail " ; 

 the latter quite heavily chitinized. 



Interni'ediate stage feviale {not of Maskell's description). — Occur- 

 ring, so far as noted, within the half -formed gall of the species; 

 maximum length mounted on a slide about 2.6 mm. ; turbinate or 

 top-shaped, but somewhat flattened on the longitudinal vertical axis; 

 antennae even more minute than in adult ; no trace of legs ; spiracles 

 shaped much as in adult ; mouthparts as in adult ; gland pores appar- 

 ently of only two types, multilocular disk and minute 8-shaped set 

 at the bottoms of small tubes, both as described for the adult, both 

 much less numerous than in that stage ; derm setae very few, small, 

 scattered, except on the conical apex of the abdomen, where they 

 are more numerous and larger ; anal tube small, swollen in the middle, 

 without setae. 



Larva. — Elongate oval, antennae apparently 6-segmented, the ter- 

 minal segment with a long apical and another subapical seta, and 

 a stout curved spine, the second segment from the last with a similar 

 spine, the second segment with two long setae; legs rather slender, 

 claw slender with tip strongly curved, no denticle, the two claw digi- 

 tules exceeding the claw, the two tarsal digitules even longer, all 

 these slender, slightly knobbed at apex; apex of abdomen with two 



