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 cleft. A narrow slit in the extremity of the abdomen of Lecanidina 

 and the full-grown Hemicoccidina only. (Plate ix., Fig. 1, b, 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 Lecanidince, usually bearing one or more hairs. 

 (Plate xi., Fig. 3, b, 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 

 ii., 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 Coccidince and by the larvse of Hemi- 

 coccidince : 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 setse. (Plate ii., Fig. 2, c, d.) 



Antenna. 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. 



Ceplialic region. That part of the insect, male or female, which bears the eyes r 

 antennae, 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. G, cZ., type.) 



Coxa. The first joint of the foot, springing directly from the underside of the 

 thoracic region. (Plate i., Figs. 6 c, 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 in a knob. The " lower pair " spring from the base of 

 the claw, and are usually broader and more trumpet-shaped than the upper 

 ones. (Plate i., Fig. 8, type.) Sometimes either pair, or both, may be absent. 

 In Ccelostoma wairoense there are no " upper " digitules, and 24 " lower ' r 

 ones on the foot of the male. (Plate xxi.) 

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