GLOSSARY OF TEEMS. 259 



Ovisac. The envelope in which the eggs are laid ; 

 sometimes mentioned as sac. 



Ovoviviparous. Producing eggs which are hatched 

 within the body of the parent or during the pro- 

 cess of extrusion. 



Ovum. The egg. 



Parasitised. Containing parasites. Affected or at- 

 tacked by parasites. 



Parastigmatic glands. Circular glands sometimes 

 present around the openings of the spiracles. 



Parthenogenesis, parthenogenetic. Reproduction with- 

 out the intervention of the male. 



Parturition. The period during which the female is 

 producing ova or larvae. 



Polygonal. Having many angles. 



Prothorax. The anterior division of the thorax, bear- 

 ing the first pair of legs. 



Pulverulent. Having finely-powdered secretion. 



Pupa. The " chrysalis " or resting stage of the male. 



Puparium. The secretionary covering of the male 

 and female Diaspinte, and the males of other sub- 

 families of the Coccidae. 



Pygidium. The compound terminal segment of the 

 Diaspinde and ConchaspindB. 



Rostral filaments. The four hair-like processes which 

 together form the sucking- tube. 



Rostrum. The upper part of the mouth from which 

 spring the rostral filaments. 



Rudimen tary. Undeveloped. 



Rugose. With fine wrinkled lines. 



Scale. The secretionary covering of various coccids. 

 Used also as a general term for scale-insects. 



Scutellum. A conspicuous shield-shaped scute on the 

 dorsal surface of the metathorax. 



Secretion. Matter produced by the various glands of 

 the body. 



Secretionary covering. That part of a Diaspid pupa- 

 rium covering the exuviae. 



Segments. The divisions of the body. 



