70 
Transactions of the Boyal Society of South Africa. 
Digitules : appendages on the feet of Coccidae. 
Dimerous : composed of two pieces. 
Distal : that part of a joint farthest from the body. 
Dorsal : of or belonging to the upper surface. 
Dorsal scale : that part of the covering scale of the Dia.^pinae that lies above the insect as 
opposed to the ventral scale which completes the puparium below. 
Ecdysis -es : the process of casting the skin ; moulting. 
Exuviae : the discarded skins cast at the periodical moults (ecdyses). 
Facets : areas or lens-like divisions of the compound eye. 
Falciform : curved like a sickle. 
Femur -ora : the thigh ; usually the stoutest segment of the leg, articulated to the body 
through trochanter and coxa, and bearing the tibia at its distal end. 
Ferrugineous : rusty red-brown. 
Filiform : thread-like. 
Fimbriate : applied to a margin or process which is fringed or finely divided. 
Fulvous : tawny ; light brown with much yellow ; nearly orange. 
Funicle : the long terminal joint of the larval antennae of Diaspinae. 
Fuscous : dark brown ; approaching black. 
Geniculate : knee- jointed ; abruptly bent in an obtuse angle. 
Genital spike : the sheath of the penis, which in the male of Diaspinae takes the form of a 
long mucronate spike. 
Gland pore : the external opening through which a gland empties its secretions. 
Gland spines : spiny appendages, each of which is supplied with a single gland whose 
opening is at the tip. 
Grouped glands : circumgenital glands. 
Halteres : a pair of small organs which replace the hind wings in the males of Coccidae, 
and in the two- winged flies (Diptera). In the Coccidae they take the form of a 
strap-shaped, or somewhat clubbed basal part with one or more long, stout, 
hooked bristles at the extremity. 
Honey-dew : a sweet, viscid substance excreted by Coccidae and some other homopterous 
insects. 
Imago : the adult or sexually developed insect. 
Inarticulate : not jointed or segmented. 
Infuscated : smoky grey-brown, with a blackish tinge. 
Instar : the period or stage between moults in a larva. 
Invagination : a pouch or sac formed by an infolding or indrawing of the outer sur- 
face. 
Lac : a mixture of resinous or waxy substance produced as a protective covering by certain 
Coccidae. 
Lamella : a thin plate. 
Line : as a term of measurement is one-twelfth of an inch. 
Lobe : any prominent rounded process ; the rounded prominent processes on the margin 
of the pygidium of the Bia^nnae. 
Lobule : one of the two distinct parts of which a lobe is sometimes composed. 
Mentum : the lower part of the mouth, which in the Coccidae takes the form of a conical 
process channelled on its upper surface to receive the rostral setae or sucking- 
tube. 
Mesosternum : the underside or breast of the mesothorax. 
Mesonotum : the upper surface of the second or middle thoracic ring. 
Mesotarsus : the tarsus of the middle leg. 
Mesothorax : the second or middle thoracic ring ; bears the middle legs and the front 
wings. 
Micron : the unit of microscopic measurement = O'OOl mm., represented by the sign p 
(i e. \p = one-thousandth part of 1 mm., or approximately 1/25,000 inch). 
