402 HTMENOPTEEA. 



7. Brachycistis exornatus. 



Fernigineus, longe albo-hirtus, antennis pedibusque pallide flavis ; alis hyalinis, nervis pallide flavis, stigmate 



fusco. tf • 

 Long. 7 millini. 



Hab. Mexico, Northern Sonora (Morrison). 



The head is not much, but still distinctly, narrower than the mesothorax, narrowed 

 and rounded behind the eyes ; smooth, shining, impunctate, somewhat sparsely covered 

 with long white hair ; the ocelli in a black patch, a deep curved furrow immediately 

 in front of them ; the oral region and mandibles paler, the tips of the latter black. 

 The mesonotum impunctate, covered with long pale hair, the parapsidal furrows 

 commencing shortly behind its centre. The scutellum coarsely punctured, and with two 

 keels down it outside the centre. The median segment has a gradually rounded slope ; 

 it is strongly reticulated, except in the centre, the centre being smooth and marked 

 with three straight keels which reach near to the middle of the segment. The pro- 

 pleurse are reticulated; the mesopleurse are coarsely reticulated, the reticulations 

 running into punctures ; the metapleurse are reticulated like the mesonotum, but with 

 the reticulations, if anything, larger, the base smooth and shining and a little exca- 

 vated. The abdomen is not much longer than the head and thorax united, and 

 covered with long fuscous hair. The petiole is not much shorter than the second 

 segment, narrowed towards the base, the apex punctured. The other segments have 

 no punctures, and are covered with long pale hairs ; the terminal segment is of a paler 

 yellow tint and without punctures. The ventral segments are covered with long white 

 hair. The legs are covered with long white hair, and are of an almost unicolorous 

 pale yellow. The radial cellule is distinctly longer than the stigma, its apex acutely 

 pointed ; the second cubital cellule is narrowed at the top, being there not much broader 

 than the space bounded by the first transverse cubital and the first recurrent nervures ; 

 the third transverse cubital and the second recurrent nervures are obliterated ; the 

 transverse basal nervure is interstitial. 



