Jan. 15,1925 
Scale Insects of the Subfamily Ortheziinae 
129 
of numerous spines with a relatively 
large number of disk pores scattered 
through the inner one-third to one-half 
of the band; area inclosed by the band 
with 5 narrow bands of scattered spines 
extending nearly to the ovisac band on 
each side; anal ring elongate oval, 
the pore band on each half rather 
narrow and not angulate within; anal 
ring with the usual 6 setae. 
This species has been redescribed 
from the following material: Dripping 
Springs, Organ Mts., N. Mex., on roots 
of grass (Gramineae), coll. T. D. A. 
Cockerell (type material). The species 
does not appear to have been observed 
since its original discovery. 
ORTHEZIA NIGROCINCTA COCKERELL 
Figs. 3, P; 6, D; 7, J; and 24; PI. 1, M 
Reference. —Cockerell, 1895, Amer. 
Nat. 29: 730. 
Adult female ,—Dried body nearly 
circular, about 2.25 millimeters long 
by 2 millimeters wide; with the usual 
marginal tufts of secretion, these all 
fairly long, mostly curved backward 
and flattened over the ovisac, and with 
the usual series of dorsal tufts, but these 
distinctly separated from the body 
margin by a bared blackish band on 
each half, this band, however, narrower 
than in either insignis or monticola, the 
combination of dorsal tufts occupying 
fully two-thirds of the disk of the 
dorsum, tufts narrow and erect ante¬ 
riorly, broader and considerably wider 
through the thoracic segments and 
again narrower, except for the last pair, 
in the abdominal region, closely approxi¬ 
mated along the median line, with 
only a linear bare streak more or less 
definitely exposed; ovisac attaining a 
length greater than ' that of the 
body, distinctly ribbed dorsally, slightly 
curved upward and slightly tapering 
posteriorly; body of female as mounted 
about 2 millimeters long by 1.5 milli¬ 
meters wide, oval, tapering somewhat 
anteriorly; derm membranous, except 
for an elongated, more or less definitely 
defined, chitinized plate running back 
dorsally from the anterior margin of 
the head; antennae normally 8-seg- 
mented, measurements of one in 
microns as follows: I, 125; II, 100; III, 
140; IV, 125; V, 115; VI, 100; VII, 103; 
VIII, broken; eyestalk stout conical, 
apex rounded, heavily chitinized; legs 
not unusual for the genus, fairly stout, 
tarsal claw with 2 or 3 indistinct den¬ 
ticles on the inner face: beak fairly 
long conical, 1-segmented, with a sug¬ 
gestion of a joint sometimes visible 
near base; thoracic spiracles entirely 
characteristic for the genus, the open- 
13950—25t-3 
ng surrounded by an indefinite collar 
of smaller, stouter spines; with 8 pairs 
of short tubular abdominal spiracles; 
derm with the usual quadrilocular disk 
pores, both dorsally and ventrally, 
these varying conspicuously in size, 
most abundant in the ventral area 
inclosed by the ovisac band; derm with 
occasional setae dorsally and ventrally, 
these most abundant in a definite 
cluster just anterior to the genital 
opening; body spines arranged in the 
usual 11 marginal and 10 dorsal clusters 
on each half, about as shown in figure, 
the dorsal clusters, while distinctly and 
mostly widely separated from the cor¬ 
responding marginal clusters, at the 
Fig. 24 —Orthezianigrocincta, adult female: A, body, 
dorsal and ventral, X about 31; B, opening of thor¬ 
acic spiracle, showing greatly reduced spines at 
edge of opening, X 230 
same time plainly transverse; ven¬ 
tral ovisac band rather stout, com¬ 
posed of numerous spines with an 
irregular row of disk pores 2 or 3 deep 
along the inner margin; ovisac band 
enclosing 3 short, transverse, narrow 
rows of spines, none of these extending 
to or even close to the ovisac band at 
the sides; anal ring elongate oval, the 
pores on each half united or nearly so 
anteriorly and posteriorly, and the 
inner margin of each pore band fairly 
distinctly angulate anteriorly and pos¬ 
teriorly; ring with the usual 6 setae. 
The following material has been 
examined in connection with the rede¬ 
scription of this species: Mescalero 
Agency, N. Mex., on Gutierrezia (Com- 
