SCALH INSECTS OF THE GENUS PARLATORIA D7 
duction garden); on EHnkianthus (Ericaceae) from Japan; on 
Huonymus (Celastraceae) from Japan and Philippine Islands; on 
Hibiscus (Malvaceae) from Chosen, District of Columbia, and 
Japan; on Luphorbia poinsettia (Euphorbiaceae) from Japan; on 
Prunus (plum, cherry, peach) (Rosaceae) from Chosen and Japan; 
on Pyrus (pear) from Chosen, China, and Japan; on Rosa 
(Rosaceae) from District of Columbia; on Staphylea (Staphyl- 
eaceae) from District of Columbia; on Syringa (Oleaceae) from 
District of Columbia; on Thea japonica (Theaceae) from District 
of Columbia; on ZVhea sinensis from Japan; and on Viburnum 
(Caprifolhaceae) from District of Columbia and Japan. 
PARLATORIA ZIZYPHUS (Lucas) 
(Pl. 6, B; pl. 9, D; pl. 11, F) 
The species here discussed as zizyphus is that one recognized under 
this name by working coccidologists throughout the world, although 
the original description by Lucas (36, pp. waviti-wxix) is so brief 
and indefinite that there is legitimate question as to the correctness 
of the association of the name and the common black citrus-infesting 
Parlatoria. In literature the insect has been recorded from a few 
hosts in addition to various species and varieties of Citrus, but all 
these records that have been examined may be questioned as possible 
misidentifications, further strengthening the suspicion that Lucas’ 
name and description may not actually apply to this insect. 
From present knowledge of the genus, this insect is so readily dis- 
tinguished from the other included species that it has not seemed 
necessary to tabulate the quantitative characters for a long series of 
specimens. In consequence the figures given in the following descrip- 
tive notes have been taken from a few, apparently average, speci- 
mens. No doubt this species will exhibit the same tendency toward 
quantitative variation that has been shown by the species which have 
been subjected to extensive and detailed tabulation. 
Adult female—EKEyespot relatively large and especially conspicuous owing 
to placement at apex of a prominent, globular to somewhat elongated pro- 
tuberance of body margin, this protuberance very rarely reduced to a con- 
spicuous rounded cone. Anterior spiracle with 2 to 4 pores adjacent; posterior 
spiracle without trace of dermal pocket. Duct tubercles: None opposite anterior 
spiracles or before these; 3 to 6 small, inconspicuous, short, rounded conical 
ones on body margin between anterior and posterior spiracles, 7 to 9 along 
margin opposite posterior spiracle, and 4 on margin of first abdominal segment. 
Dorsal submarginal tubular ducts few, 10 to 14, the reduction in number being 
chiefly on anterior abdominal segments. A small oval cicatrix usually visible 
on each side of abdomen, apparently along anterior margin of second abdominal 
segment, but not observed in some of the specimens examined. No isolated 
sclerotic flecks observed on pygidium. Without dorsal intermediate macroducts, 
usually without but occasionally with a single intermediate microduct above 
anterior lateral paragenital pore cluster. The 38 pairs of normally developed 
lobes small, slender, practically equal in size, faintly notched on both inner 
and outer margins; fourth lobes likewise slender, strongly protruding, suggest- 
ing a sclerotized spur; no trace of a sclerotic structure at point where fifth 
lobes would occur. Plates between lobes slender, much as in other species; 
those between third and fourth lobes and just beyond fourth lobes broadened, 
oval, but strongly fimbriate along outer margin; intermediate plate hetween 
third and fourth lobes widest, but not approaching condition in some other 
species; remaining plates elongate-oval to irregularly lanceolate, strongly 
