USED IN ENTOMOLOGY. 



97 



Parasitism: a form of symbiosis in which one party lives upon or at the ex- 

 pense of the other, makes no return and destroys its host : see symbiosis : 



commensalism. 

 Parastigma: = pterostigma : q. v. 

 Parastigmatic glands: small, circular glands, which secrete a waxy powder, 



sometimes present around the spiracles of Coccidcc. 

 Paratype: is every specimen of the series from which the type wa! elected: 



see type and cotype. 

 Parce: sparse or sparsely. 

 Parcidentate: with few teeth. 



Parenchymatous: composed of soft cellular and connective tissue. 

 Parietes: walls: the perpendicular sides of elevated bodies. 

 Paronychium -ia: one or more bristle-like appendages of onychia; q, v. 

 Parthenogenetic: see asexual. 

 Parthenogenesis: reproduction by direct growth of germs from egg-cells 



without fertilization by the male element : as in plant lice, gall wasps, etc. 

 Particolored: partly of one, partly of another color: divided into two or more 



color fields. 

 Partite -us: divided: e. g., the eyes of Gyrinidte. 

 Parum: not much. 

 Patagium-ia: in Lcpidoptcra, those sclerites that cover the base of primaries: 



often used as synonymous with tegula and squamula, q. v. : assigned by some 



writers to the pro-, by others to the meso-thorax : homologized with the 



paraptera of meso-thorax. 

 Patella -ae: the modified joints of anterior tarsi in Dytiscida- : plate-like, 



horny or spongy structures on the undersides of the tarsal joints: the first 



coxal joint. 

 Patellar: pertaining to the knee-joint or cap. 

 Patellariae: in Dytiscids, the unequal, cup-like impressions on the underside of 



the patella. 

 Patens, Patentes: open; diverging; spreading apart. 

 Patria: home or country of origin. 

 Patulous -ose: open, spreading. 

 Paunch: a crop-like accessory pouch in some Mallophaga: any pouch 



appendage of the alimentary canal. 

 Paurometabolous: metamorphosis in which the changes of form are gradual 



and inconspicuous : e. g., Orthoplcrii and most Rhynckota. 

 Pavillions: the sheds or cells sometimes built by ants as a shelter for groups 



of plant lice. 

 Paxilla: a small stake or peg: a bundle of spicular processes. 

 Pearlaceous: having the appearance of pearl. 

 Pecten: a comb: in Hymenoptera, rigid, incurved seta: on the basal parts of 



maxilla and labium : the rows of spines i>n the feet of pollen-gathering 



bees: any series of bristles arranged like a comb: in mosquito larvae the 

 mb like teeth on the breathing tube. 

 Pectinate: comb-shaped: with even branches like the teeth of a comb. 

 Pectinato-fimbriate: having pectinations that are fringed with hair. 

 7 



