pectinate antenna -- one in which a number of segments are enlarged into 

 long tooth- like projections so that the antenna resembles a comb or a 

 garden rake (Fig. 121) . 



penis -- median lobe of male genitalia, attached to basal piece and flanked 

 or enclosed by the paired parameres (Fig. 10) , 



pile -- pubescence; fuzz; short, dense hairs. 



plastron -- gaseous film maintained under water by means of small, close- 

 set, hydrofuge hairs covering parts of the body surface. 



pleurite -- a sclerite covering part or all of a pleuron (Fig. 13). 



pleuron (plural, pleio'a') -- the lateral region of a body segment between 

 tergum and sternum. 



postpleurite -- the pleurite of the prothorax behind the coxa (Fig. 13). 



proGoxa -- the coxa of a front leg (Fig. 3). 



pronotum -- the dorsal portion of tergum of the prothorax (Figs 1, 3, 12). 



propleuron -- the pleuron of the prothorax, 



prostemal process -- posterior median projection of the presternum 

 between the procoxae (Fig. 2). 



pvostemum -- sternum of the prothorax (Figs 2, 3, 13). 



prothorax -- first segment of thorax, to which head is attached and into 

 which the head may be partially or entirely withdrawn; this segment also 

 bears the front pair of legs. 



pubescence -- fuzz; hairs. 



puncta, punctation -- small punctures or pits in the surface; rows of 

 such punctures form the striae of the elytra. 



recia>ved -- bent or curved upward. 



riparian -- shore-dwelling; occurring at or near the margin of the water. 



rufous -- reddish. 



sclerite --a hardened piece or section of the exoskeleton. 



sclerotised -- hardened. 



sautellum -- the wedge-shaped median dorsal sclerite between the basal 

 portions of the elytra (Fig. 1). 



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