EXPLANATION OF TERMS USED IN THE FOLLOWING PAGES. 
Abdomen. The posterior half of the body of male or female, whether joined to 
the anterior half or slightly separated, segmented or not. 
Abdominal cieft. A narrow slit in the extremity of the abdomen of Lecanidine 
and the full-grown Hemicoccidine only. (Plate ix., Fig. 1, 6, c.) On the 
upper side of the body are seen the 
Abdominal lobes, two minute, divergent, triangular or conical, excrescences, one 
on each side of the cleft, in Lecanidine, usually bearing one or more hairs. 
(Plate xi., Fig. 3, 6, c.) 
Abdominal spike. A more or less long, tubular or semi-tubular, pointed process 
terminating the abdomen of the male in all species, and serving as a sheath 
for the penis, which is a long, white, soft tube with recurved hairs. (Plate 
il., Fig. 3; Plate xxi., Fig. 1, %.) 
Anal ring, anogenital ring. An orifice situated near the abdominal extremity 
of the female, either simple or compound, hairless or bearing several hairs. 
(Plate ii., Fig. 1.) 
Anal tubercles. Exhibited only by the Coccidine and by the larvee of Hemi- 
coccidine: two more or less conspicuous projecting processes at the ab- 
dominal extremity of the female, without any cleft, and in most instances 
projecting beyond the edge ; usually bearing sete. (Plate ii., Fig. 2, c, d.) 
Antenne. Two jointed organs (‘‘ feelers’’) projecting from the anterior portion 
of the body, of variable length. (Plate i., Figs. 9, 10, 11, types.) 
Apodous. Without feet. 
Apterous. Without wings. 
Bucca, buccal. The mouth; belonging to the mouth. 
Carina, carinated. A keel or raised ridge; keeled. 
Cephalic region. That part of the insect, male or female, which bears the eyes, 
antenne, and mouth, but not including the first pair of feet. 
Clavate. Club-shaped; somewhat knobbed. 
Claw. The hooked terminating joint of the foot. (Plate i., Fig. 6, cl., type.) 
Coxa. The first joint of the foot, springing directly from the underside of the 
thoracic region. (Plate i., Figs. 6c, 7 c.) 
Digitules. Appendages observed on the feet, and often useful for distinguishing 
species. Usually there are two pairs. The “ upper pair”’ spring from the 
upper side of the extremity of the tarsus, and are generally long, fine 
hairs, terminating ina knob. The ‘lower pair” spring from the base of 
the claw, and are usually broader and more trumpet-shaped than the upper 
ones. (Platei., Fig. 8, type.) Sometimes either pair, or both, may be absent. 
In Celostoma wairoense there are no “upper” digitules, and 24 * lower ”” 
ones on the foot of the male. (Plate xxi.) 
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