Jan. 15, 1925 
Scale Insects of the Subfamily Orthezvlnae 
105 
II. graminis Tins., monticola Ckll., 
and pseudograminis, n. sp. 
Characterized primarily by 
the occurrence of more or less 
distinct bare derm stripe be¬ 
tween the dorsal and marginal 
clusters of spines and cor¬ 
responding tufts of secretion, 
in combination with the occur¬ 
rence of 7 pairs of abdominal 
spiracles, the absence of any 
chitinized dermal areas, the 
presence of a flattened conical 
eyestalk, and an anal ring 
with the inner margin of the 
pore bands not strongly angu- 
late. 
III. artemisiae Ckll., galapagoensis 
Kuw., garryae Ckll., longipes 
Hemp., praelonga Dougl., ul¬ 
tima Ckll., varipes Leon. Char¬ 
acterized primarily by the 
presence of an anterior, dor¬ 
sal, median, chitinized derm 
plate extending posteriorly be¬ 
tween the anterior marginal 
spine clusters, in combination 
with the presence of 7 pairs 
of abdominal spiracles, and 
usually a strongly conical 
eyestalk. 
IV. mexicana , n. sp. Characterized 
primarily by the substitution, 
in the ventral abdominal area, 
of transverse rows of truncate 
conical tubercles for the usual 
transverse rows of spines, and 
secondarily by the absence of 
chitinized derm plates, the 
presence of 7 pairs of abdomi¬ 
nal spiracles, complete dorsal 
spine bands and secretion, and 
numerous pores through the 
outer fourth of the ovisac band, 
but none along or through the 
inner margin. 
V. caudata Ferris. Characterized 
primarily by the presence, in 
the dorsal spine bands and to 
some extent in the marginal 
clusters, of a few spines very 
much larger, more heavily chit¬ 
inized, and much more con¬ 
spicuous than the average, and 
secondarily by the presence of 
a median dorsal anterior chit¬ 
inized plate as in the garryae 
group, but in combination with 
8 pairs of abdominal spiracles 
instead of 7. 
VI. bailout, n. sp., minor, n. sp., till- 
andsiae, n. sp. Characterized 
primarily by the apparent 
presence of only 4 pairs of ab¬ 
dominal spiracles, and sec- 
13950—25t-2 
ondarilv, in two of the species 
only, by the presence of con¬ 
spicuous dorsal abdominal 
plates in connection with the 
dorsal spine bands, by small 
size, and by subtropical dis¬ 
tribution. 
VII. annae Ckll., nuda Ferris, nigro- 
cincta Ckll., sonorensis Ckll. 
Characterized primarily by 
the more or less marked reduc¬ 
tion in size and shape of the 
spines in the collar surround¬ 
ing the opening of each thor¬ 
acic spiracle, and by a more or 
less incompletely developed 
anal ring, with the pore bands 
of this hardly angulate within 
and often with a more or less 
distinct lateral chitinized wing, 
in connection with the pres¬ 
ence of 8 pairs of abdominal 
spiracles, and, except in nigro - 
cincta, the absence of any 
dermal chitinization. 
The species nuda has been some¬ 
what doubtfully included in 
this group, as its structures 
diverge more or lees distinctly 
from the primary characteris¬ 
tics indicated, and in addition 
it lacks some, at least, of the 
marginal and most of the dorsal 
spine clusters and secretionary 
tufts, while the remainder are 
much reduced in size. 
VIII. arenariae Vays., boliviana, n. sp., 
cheilanthi Tins., grandis Hemp., 
lasiorum Ckll., olivacea Ckll., 
solidaginis Sanders, urticae (L.), 
yashushii Kuw. Characterized 
primarily by the presence of 
complete dorsal spine bands 
and secretion, 8 pairs of ab¬ 
dominal spiracles, 5 transverse 
rows of spines in the ventral 
abdominal region, and a usu¬ 
ally distinctly conical eye¬ 
stalk, in combination with the 
absence of any dermal chit¬ 
inization. 
Some of the species, as cheilanthi 
Tins., with slightly clavate 
derm spines, and lasiorum 
Ckll. and olivacea Ckll., with 
normally 7-segmented anten¬ 
nae, tend to diverge from the 
characteristic condition in this 
group as represented by the 
species urticae (L.). 
With the exceptions indicated in the 
footnote, the known species of the sub¬ 
genus Orthezia have been included in 
the following key: 
