Pseudova: egg-like germ cells capable of development without fertilization e.g. in certain plant lice. Pseudovary: the organ or mass of germ cells of an agamic insect. Pseudo-vitellus: a cellular organ in Aphididae, supposed to replace the absent Malpighian tubules. Psocoptera: = Corrodentia; q.v. Psychogenesis: the origin and development of social and other instincts and habits. Pterodicera: with wings and two antenna. Pterogostia: the wing veins. Pterogostia: referring to the wing structure. Pteropega: wing sockets or cavities into which the wings are inserted. Pteropleura: in Diptera, are situated below the base of the wings behind the meso-pleural suture: = the posterior lateral plate of mesothorax of Lowne; the episternum of meso-thorax of Hammond. Pteropleural bristles: in Diptera, are inserted on the pteropleura. Pterostigma: a thickened, opaque spot on the costal margin of a wing, near its middle or at end of the radius: = bathmis, and see stigma. Pterotheca: that part of the pupa that covers the wings. Pterothorax: the wing-hearing thoracic segments in Thysanoptera. Pterygium: a lateral expansion of the snout of some Coleoptera. Pterygodes: the patagia or tegtila: q.v. Pterygogenea: insects that are winged in the adult stage or believed to be descended from winged ancestors: see apterogogenea. Pterygostium: a wing vein. Pterygote: wing bearing. Ptilinum: in Diptera cyclorrhapha, an inflatable organ capable of being thrust out through a frontal suture just above the root of antenna. Ptilota: winged insects. Pubes or Pubescence: short, fine, soft, erect hair or down. Pubescent: downy: clothed with soft, short, fine, closely set hair. Pubis: the lateral region of the prothorax. Pulmonarium: the membranous connection of the plates or scutes of the abdominal rings: = connexivum. Pulsatile: having the power of pulsating or moving in a rhythmic manner: applied to special organs in the legs, which aid in circulating the blood in these appendages. Pulverulent: powdery or dusty in appearance. Pulvilliform: having the appearance or structure of a pulvillus. Pulvillus -i: soft, pad-like structures between tarsal claws: the cushions of short, stiff hair or other clothing on the underside of tarsal joints; rarely fleshy lobes: see arolium. Pulvinatus: moderately convex. Punctate: set with impressed points or punctures. Punctiformis: shaped like a point or dot. Punctulatus: with small punctures. Puncture: an impression like that made by a needle. Punctured: marked with small, impressed dots. Puniceus: carmine red [carmine]. Pupa: the intermediate stage between larva and adult; loosely applied for all orders, properly only for those with a complete metamorphosis: a pupa is obtect, when inclosed in a rigid case on which the members may or may not be outlined. It is liber, or free when the appendages are separately encased and there is no covering over the whole: see chrysalis.