18, 6 Morrison: Nondiaspine Coccide 655 
quite noticeably smaller in proportion to the length of the middle 
spine in this lot of specimens as compared with typical material. 
Coccus tumuliferus sp. nov. Plate 1, fig. 3. 
Adult female —Occurring within the hollow stems of the host, 
probably attended by ants; rarely broad oval, but usually broad- 
ened behind and triangular with the angles rounded; plane of 
dorsal surface flat, but in dried specimens covered with relatively 
large knobs having a fairly definite arrangement of a median 
longitudinal single row and on each side of this two other rows, 
the outer one forming a continuous row around the body at the 
margin ; dorsally covered with a thin, brittle, whitish but more or 
less translucent, glassy secretion, very easily broken and usually 
more or less wanting, molded into elevations and depressions 
corresponding to those of the body, this covering normally want- 
ing over the flattened extreme margin of the body ; body color dull 
brown, of secretionary covering, as stated, translucent whitish; 
maximum length noted, 2 millimeters; width, 2; body as mounted 
on slide similar in shape and size to unmounted specimens; derm 
in fully matured individuals becoming somewhat chitinized, more 
especially along the margin where the inner border of the 
chitinized zone is broadly scalloped, corresponding to the borders 
of the adjacent knoblike elevations, the tongues of these scallops 
continued inward and united with a chitinized pattern cor- 
responding exactly with the deep grooves running between the 
conspicuous body knobs; antenne normally 8-segmented, the 
measurements of those available for study as follows (in 
microns) : II, 43-50; III, 39-43; IV, 32-35.7; V, 18; VI, 16-18; 
VII, 14; VIII, 18-21; legs of normal form, rather small and 
slender, claw rather stout and strongly curved, without denticle, 
. all digitules slender, threadlike, with slightly swollen tips, 
spiracles not unusual, placed rather near the body margin and 
each with a slight depression in the margin opposite it; with a 
wide band of scattered pores between spiracle and margin; 
mentum apparently 1-segmented, short, and broad triangular, 
apex rounded; derm pores of several sorts, tiny tubular ducts 
scattered over the dorsum, large tubular ducts with cup-shaped 
inner ends mostly close to the body margin, and a very few 
circular disk pores, apparently simple, in line anterior to the 
anal plates; ventrally with multilocular disk pores of two sizes, 
a few large, with eight to ten loculi beneath the anal plates, the 
others smaller, normally with five loculi in wide bands between 
Spiracles and margin; marginal sete long, slender, hairlike, in a 
