SCALE INSECTS OF THE GENUS PARLATORIA 29 
KEY TO SPECIES OF PARLATORIA HEREIN DESCRIBED 
a. No duct tubercles on anterior portion of body, opposite anterior spiracles, or 
before these; eyespot large and conspicuous; submarginal dorsal tubular 
ducts very few, probably not exceeding 15 on each side of body; no dorsal 
intermediate macroducts; microducts, if present in this area, very few and 
inconspicuous. 
b. No duct tubercles present on any part of body; eyespot a large, circular, 
sclerotized area on surface of body; fully developed pygidial lobes 
entire, or at most only very slightly notched or sinuate laterally; no 
definitely formed fourth lobe, at most a blunted extension of body 
TOOK LODO hskeaes Saat ad RES CaS SiR re Cn me eee blanchardi (Targ.) 
bb. With duct tubercles on body margin between anterior and posterior 
spiracles, opposite posterior spiracles, and on first abdominal segment, 
but these small and inconspicuous; eyespot large but set at apex of a 
conspicuous globular to somewhat elongated projection of body margin; 
fully developed pygidial lobes distinctly notched laterally; fourth lobe 
represented by a stout and conspicuous sclerotized spur_zizyphus (Lucas) 
aa. With duct tubercles, often numerous and usually conspicuous, on body 
margin opposite anterior spiracles, and before these; eyespot various, 
sometimes difficult or impossible even to locate, but not as above described; 
submarginal dorsal tubular ducts numerous to very numerous according 
to the species, 20 to 100 or more, except in proteus, this with as few as 10; 
with some dorsal intermediate macroducts or, more often, with 2 or more 
segmental rows of microducts in this area, these occasionally much reduced 
in number or even lacking. 
7 c. Normal specimens without a marginal tubular macroduct between 
| median lobes of pygidium, these lobes relatively close together and 
. strongly crowding the very slender interlobular plates; eyespot 
tiny but distinct; with dorsal intermediate and median macroducts 
on abdomen; median and second lobes large, conspicuous, strongly 
protruding, once notched externally; paragenitals in 5 groups, 
LAY LOTTE ROWS SID) (RO Aen ee ee banksiae (Mask.) 
4 cc. Normal specimens with a marginal tubular macroduct between 
median lobes of pygidium; other characters various but not in 
preceding combination; paragenitals mostly in 4 groups and prob- 
q ably never over a total of 60, except in oleae, this usually with 5 
i groups and from 60 to 100 pores, and theae, this occasionally with 
an anterior median group of 1 to 5 pores. 
d. Intermediate marginal plate between third and angular sclero- 
tized fourth pygidial lobes deeply cleft, giving an appearance of 
4 distinct and rather slender plates between these lobes, in- 
stead of usual 3 plates with intermediate one wide; paragenitals 
usually in 5 groups (the anterior median, however, sometimes 
lacking), numerous, usually totaling 70 or more; with dorsal 
intermediate macroducts, mostly in 3 segmental rows on each 
side of abdomen; without an invaginated membranous pocket 
in derm between posterior spiracle and body margin; eyespot 
inconspicuous; submarginal tubular ducts numerous, usually 
60 or more on each side of body; median and second lobes 
especially large, prominent, their external notch deep and 
COMS PUCUO US eee es SN Wie eer ed chs Pet ee oleae (Colvée) 
| dd. Intermediate marginal plate between third and fourth pydigial 
| lobes never cleft in normal specimens, and usually the largest 
| plate on pygidial margin; paragenitals usually in 4 or fewer 
groups (sometimes in 5 groups in theae) (isolated stray pores, 
apparently belonging with nearest pore cluster, noted occasion- 
ally); other characters not in above-described combination. 
e. Several, generally a total of 6 to 8, dorsal macroducts showing 
on pygidium within frame formed by paragenital pore 
clusters, usually as a row of 3 or 4 0n each side of anal open- 
ing; fully developed pygidial lobes large and strongly pro- 
truding, strongly graded in size from inner to outer, each 
| characteristically twice or even thrice notched on outer 
side; fourth lobe a short, broad, more or less sclerotized 
extension of pygidial margin, usually showing several small 
