Glossary of Special Terms. 125 



Posterior callosity, a swelling between the root of the wings and the scutellum. 

 (Diptera). 



Posterior cells, a variable number of cells extending to the hind margin of the wings, 

 the first bounded inwardly by the anterior crossvein (Diptera). 



Posthtuneral bristle, one or more bristles placed just inside of the shoulder-swelling 

 (Diptera). 



Postscutellum, a small piece of the thora.x immediately behind the scutellum. 



Postvertical bristles, a pair of minute bristles behind the ocelli (Diptera) (PI. 13, 

 fig. 504). 



Preapical bristle, a bristle on the outside of the tibia; just before the apex (Diptera). 



Predatory, capturing living prey. 



Pygidium, the last dorsal segment. 



Prefurca, the petiole of the second and third veins of Diptera. 



Presutural bristle, one or more bristles on each side of the mesonotum just in front 

 of the transverse suture (Diptera) (PI. 13, fig. 302). 



Proboscis, the extended trunk-like or beak-like mouthparts. 



Proepimeron (-ra), that part at the rear of the side of the prothorax next the coxse. 



Prondtum, the back or upper side of the prothorax. 



Propleiira (-rae), the .side portion of the prothorax. 



Prostemum, the middle of the underside of the prothorax. 



Prothoracic bristle, a bristle above the front coxse (Diptera) . 



ProthSrax, the first division of the thorax, bearing the front legs. 



PrOinose, coated with a hoary dust. 



Pteropleural bristles, bristles located on the sides of the body just beneath the root 

 of the wings (Diptera) (PI. 13, fig. 303). 



Ptalvillus, (-li), a pair of pads beneath the tarsal claws. 



Pftpa (-pse), the resting stage preceding the transformation to adult, sometimes 

 called chrysalis. 



Radial cell, one or more cells near the anterior margin of the wing (Hymenoptera) 

 (PI. 3, fig. 36). 



Radial sector, the posterior of the two main divisions of the radius. 



Radius, the third of the principal veins of the wings. 



Raptorial, fitted for grasping prey. 



Reclinate, pointing backward. 



Recurrent nervure, one or two transverse veins arising from the lower side of the 

 cubital cells (Hymenoptera) (PI. 3, fig. 36;. 



Reniform, kidney-shaped. 



Reticulate, meshed, like net-work. 



Rostrum, a beak or snout. 



Scape, the basal joint or joints of the antennae. 



Sclerite, any piece of the body wall bounded by sutures. 



Scopa, a brush on the underside of the abdomen, for collecting pollen (Hymenop- 

 tera) . 



Scutellum, a somewhat triangular or crescentic division at the rear of the meso- 

 notum. 



Serrate, saw-toothed. 



