NORTH AMKRIOAN II YMKNOPTERA. 49 



THE NORTH Ai^KRICAlV SPfXIKS OF < EROI'AI.EK, 



WITH A CATALOGUIi; OK THK DK.SCllIHKI) .sl'KCMCS OK TIIK WOItl.I). 



BY WILLIAM J. FOX. 



CEROPAEES Lati. 



Ceropales Latr., Prec. caract. gen. lus. 1796, p. 123, Gen. 25. 



Labrum produced oat under the ch/peus. Eyes reacliing, or ii(;arly 

 so, to the base of the iiiatidibles. Anteiime also in the 9 porred, or 

 but little beat, geiienilly inserted in close proximity to the base of the 

 clypeus* Posterior margin of the prothorax arcuate. Anterior 

 wings with a lanceolate marginal and three subraarginal cells ; the 

 second submarginal receives the first recurrent nervure beyond the 

 middle; the tiiird submarginal receives the second recurrent nervure 

 before the middle. Basal vein interstitial. The cubital vein of tlie 

 hind wings begins at a little distance beyond the apex of the sub- 

 median cell. Legs armed only with minxde spines or entirely spineless. 

 On the front legs there is no tarsal comb. Claws with a curved 

 tooth in the middle or near the apex of their inner edge. Thorax 

 proportionately broad and short, never emarginate. Third ventral 

 segment without transverse imjyression, sting-sheath of the 9 projectinq 

 {Kohl.) 



I do not think this genus is entitled to family distinction, as pro- 

 ]>()sed by Radoszkowski (Bull. Soc Nat. Moscow, 1888, p. 489), 

 founded on the genitalia of the male. The following table will aid 

 in distinguishing the species. 



FEMALES. 



Body entirely black, at the most with a spot ou the postsciitelliim ami anterior 

 orbits, white. 



I'osterior femora reddisli bipiliicf atH. 



Posterior femora l)lack iiigripes. 



Hody more or less ornamented with white or yellow. 



Antennse as long, or slightly longer than head and tliorax together. 



Metathorax without, or witli an exceedingly short, indi.stinct. medial snlcii.s. 



I rat or II a. 



Metathorax with a distinct, rather long, sulcus medially Ciibi'iisis. 



Antennse shorter than the head and thorax. 

 Metathorax with a very short sulcus medially. 



First abdominal segment almost entirely yellow above Kf ret <'liii. 



First al)dominal segment with the apical margin pale yellow. .Iiilvipe!*. 

 First al)dominal segment with a large, yellow spot on each side. 



lougipes. 



* This does not seem to apply to any of the North American species known 

 to me, they having the antennw situated above the clypeus at a distance which 

 is almost equal to the length of the scape. 



TR.\.NS. AM. ENT. SOC. XIX. (7) .MAUIH, 18!)2. 



