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 Coccidoe. 



Paratype: is every specimen of the series from which the type was selected: 

 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 Gyrinidcc. 



Parum: not much. 



Patagium-ia: in Lepidoptcra, those sclerites that cover the base of pri- 

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

 by some writers to the pro-, by others to the mesothorax : homologized 

 with the paraptera of mesothorax. 



Patella -ge: the modified joints of anterior tarsi in Dytiscidcs ; plate-like, 

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

 coxal joint. 



Patella r: 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-like 

 appendage of the alimentary canal. 



Paurometabolous: metamorphosis in which the changes of form are gradual 

 and inconspicuous : e. g., Orthoptcra and most Rhynchota. 



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 Hymcnoptcra, rigid, incurved set-e on the basal parts of 

 maxilla and labium : the rows of spines on the feet of pollen-gathering 

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

 comb-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. 



