136 
Journal of Agricultural Research 
Vol. XXX, No. 2 
This species has been described from 
the following lots of material: Sterling, 
Colo., on Sporobolus cryptandrus (Gram- 
ineae), coll. E. O. G. Kelly, July, 1908 
(type and paratypes); Lamar, Colo., 
on Deschampsia cespitosa (Gramineae), 
coll. E. D. Ball, Sept., 1898 (paratypes); 
Pecos, Tex., on salt grass (Distichlis 
spicata) (Gramineae), coll. C. N. Ainslie, 
July, 1908 (paratypes); Mesilla Park, 
N. Mex., on grass (Gramineae), Oct. 
19, 1897, coll. Cockerell (paratypes). 
The types are in the United States 
National Collection of Coccidae. 
apparent occurrence of both species at 
Mesilla Park is evidence in favor of the 
assumption that the difference in the 
extent of the lateral development of 
dorsal spine bands is merely due to vari¬ 
ation, but such an assumption needs veri¬ 
fication by some positive evidence of 
variation or intergradation before it can 
be fully accepted and thespecies describ¬ 
ed herewith as new be reduced to syn¬ 
onymy. This description will at least 
serve to emphasize the need for an ex¬ 
amination of a long series of specimens 
of these grass-inhabiting forms. 
ORTHEZIA SOLIDAGINIS 
SANDERS 
Figs. 3, V; 6, H; and 30; PI. 2, D 
Reference. —S a n d ers, 
1904, Ohio Nat. 4: 94-95, 
pi. 8, figs. 57-63. 
Synonym. —Orthezia am - 
brosiae Lawson, 1917, Univ. 
Kan. Bui. Biol. Ser. 18: 165- 
167, fig. 1. 
Adult female. —Extern¬ 
al appearance described in 
detail by Sanders in his orig¬ 
inal description, and by 
Lawson under the name am- 
brosiae , and illustrated in 
photograph accompanying 
this paper. Length of 
body, with ovisac, 6 to 7.5 
millimeters; width about 2.5 
millimeters; length of body, 
as mounted, about 2.75 mil¬ 
limeters; width about 2 mil¬ 
limeters, oval, tapering more 
or less distinctly anteriorly; 
derm membranous; anten¬ 
nae normally 8-segmented, 
measurements of one in mi¬ 
crons as follows: I, 160; II * 
143; III, 246; IV, 164; V’ 
171; VI, 150; VII, 133; VHP 
200 ; spine, 21; eyestalk 
rather strongly protruding, 
conical tuberculate; * legs 
characteristic for the genus, 
rather long and slender, tarsal claw 
usually with 3 distinct denticles on the 
inner face; beak conical, 1-segmented, 
with a fairly distinct indication of a 
division line about one-third of the 
length from base; thoracic spiracles 
characteristic for the genus, the opening 
of each surrounded by a distinct and 
rather conspicuous, closely set collar of 
spines, a portion of this collar resting 
on a somewhat chitinized curved plate 
following the outline of the opening; 
with 8 pairs of long tubular abdominal 
spiracles; with the usual quadrilocular 
disk pores, these present both dorsally 
and ventrally, more numerous in and 
along the inner margin of the ovisac 
band and also rather abundant through- 
The species described above is ex¬ 
tremely close to typical graminis , 
differing definitely only with respect to 
the extent of the lateral development 
of the dorsal spine bands as described 
and illustrated, and it has, in conse¬ 
quence, been very reluctantly charac¬ 
terized as new, since it seems not en¬ 
tirely unreasonable that these dorsal 
bands might vary to this extent. The 
material at hand, however, where in a 
condition for accurate study, fails to 
disclose any marked variation in series 
of specimens from any one lot, or any¬ 
thing approximating a definite range 
of intergradation between the condi¬ 
tions of the spine development which 
appear to delimit the two species. The 
