316 ENTOMOLOGICAL NEWS. [July, '09 



Prealar callus, a not very prominent projection, situated be- 

 fore the root of the wing, on the side of the mesonotum, just 

 back of the outer end of the transverse suture. 



Prescutellar row, the hindmost bristles of the acrostical and 

 dorsocentral rows, forming a transverse row in front of the 

 Fcutellum. 



Presutural bristles, one or more bristles, situated immedi- 

 ately in front of the transverse suture, above the presutural de- 

 pression. 



Presutural depression, usually triangular in shape, at the 

 outer end of the transverse suture, near the notopleural suture. 



Propleura, a space situated immediately in front of the an- 

 terior spiracle of the thorax and below the humeral callus. 



Propleural bristles, one or more bristles inserted on the 

 lower part of the propleura, immediately above the front 

 coxa. 



Proalar bristle, the Pro alarborste of Stein, in the An- 

 thomyidae, a bristle on the back of the thorax which stands 

 immediately before the largest and strongest supraalar bristle 

 at the base of the wings. 



Prostigma or anterior thoracic spiracle, placed between 

 the propleura and the mesopleura, immediately below the 

 humerus. 



Pteropleura, situated below the root of the wing, back of 

 the mesopleural suture. 



Pteropleural bristles (rare), inserted on the pteropleura, 

 hard to see; found in Trypeta. 



Scutellar bristles, discal. Usually a single pair of bristles 

 borne on the dorsal portion of the scutellum, one on each side 

 of the median line, slightly behind its middle. 



Scutellar bristles, marginal. Usually a distinct row of large 

 bristles, borne on the margin of the scutellum, which point 

 upward and backward with a slight curve inward. 



Scutellar bridge, a small ridge on either side of the scutel- 

 lum, connecting it with the mesonotum. 



Scutellum, a sub-hemispherical body posteriorily cut off by 

 an impressed line from the dorsum of the mesothorax ; it usu- 



