STIZUS. 



GENERIC CHARACTER. 



Thorax with the first segment transverse 

 linear: feet short or moderately long: labrum 

 entirely exserted, short, semicircular: palpi fili- 

 form, maxillary ones longer, six-jointed; labial 

 palpi four-jointed : ocelli very distinct : superior 

 wings not folded longitudinally: radial cellule 

 one, elongated ; cubital cellules three, the second 

 narrowed before, and receiving the two recurrent 

 nervures ; the third not attaining to the end of 

 the wing. 



OBSERVATIONS. 



Latreille formed this genus for the reception of 

 many species of the tribe Bembecides, distin- 

 guished by the above recited characters. These 

 species had previously been placed in the genus 

 Bembex by Fabricius and Olivier, in that of 

 Crabro by Rossi and Fabricius, in Larra by 

 Illiger and Fabricius, in Sphex by Villers, in 

 Mellinus by Panzer, in Liris and Scolia by 



PLATE II. 



