POMPILUS. 



^ 11. Pompilus formosus. 



Ferreola formosa, Smith, Journ. Ent. i. p. 399 *. 

 Hab. Mexico 1 , Oaxaca (Mus. Brit.). 



This is closely related to P. bugabensis. 



12. Pompilus aztecus. 



Ferreola azteca, Cresson, Proc. Bost. Soc. Nat. Hist. xii. p. 376 \ 

 Hab. Mexico, Vera Cruz (Sartorius l ). 



^ 13. 



Pompilus laevifrons. 



Ferreola lavifrons, Cresson, Proc. Bost. Soc. Nat. Hist. xii. p. 376 l . 

 Hab. Mexico, Orizaba (Sumichrast l ). 



This species is probably synonymous with either P. telemon or P. eubule y I cannot 

 make it out from the description. 



I here place six species, which only agree in having two cubital cellules ; they 

 differ from Planiceps in not having the head flattened, nor the anterior tibiae dilated. 

 P. smithianus is a typical Aporus and has the prothorax quadrato-elongate. 



r 

 14. Pompilus tseniatus. 



Pompilus tamiatus, Kohl, Verh. zool.-bot. Ges. Wien, xxxvi. p. 336 l . 

 Hab. Mexico, Orizaba (Bilimek x ). 



15. Pompilus (Aporus) yucatanensis. 



Long. 7 millim. 



Hab. Mexico, North Yucatan (Gaumer). 



Black, covered with a sericeous pile, the abdominal segments banded with it. Head 

 densely covered with a white sericeous pile ; eyes slightly converging beneath ; the 

 hinder ocelli separated from each other by, if anything, a greater distance than they 

 are from the eyes ; the apex of the clypeus almost transverse. Antennae stout, covered 

 with a microscopic pile; the third joint longer than the fourth. Thorax shining, 

 sparsely covered with a short pubescence. The prothorax as long as the head, not 

 much narrowed towards the base ; at the apex almost transverse. The median segment 

 rather long; the apex oblique, at the sides projecting into stout teeth-like processes. 

 Abdomen as long as the thorax, pruinose, sessile ; the apex blunt, bearing some long 

 black hairs ; the apex of the penultimate ventral segment deeply incised. The anterior 

 tarsi only ciliated beneath, and with a stout spine at the apices of the joints ; the spurs 



