POMPILUS. 191 



the hind tibiae reaching beyond the middle of the metatarsus. Fore wings with only 

 two cubital cellules, the second a little narrowed at the top ; both transverse cubital 

 nervures curved ; the first recurrent nervure received before the middle of the cellule, 

 the second clearly beyond the second transverse cubital ; the basal nervure interstitial ; 

 the anal nervure in hind wings received before the cubital. The wings are subhyaline, 

 the apex smoky. The head is distinctly convex in front; behind almost transverse. 



'18. Pompilus flavomarginatus. 



Niger, linea pronoti, calcaribus maculisque abdominis flavis ; alis hyalinis, nervis pallidis. 

 Long. 7 millim. J . 



Hab. Mexico, Temax in North Yucatan (Gaumer). 



Antenna? stout, densely covered with a stiff black pile ; the third joint shorter than 

 the fourth, the seventh and eighth deeply incised above (the other joints broken off). 

 The face long, from the ocelli densely covered with long silvery pubescence ; the eyes 

 reaching to the base of the mandibles, curved, sharply converging at the bottom ; the 

 hinder ocelli separated from the eyes by about the same distance they are from each 

 other ; the vertex where the ocelli are is raised ; the apex of the clypeus is rounded. 

 Thorax covered with a silvery pubescence ; the prothorax as long as the head, rounded 

 in front, angled behind. Scutellum broad at the base, narrowed towards the apex. 

 The median segment with a gradually rounded slope to the apex, finely punctured. 

 Abdomen subpetiolate, compressed, the apex laterally oblique. Legs short, covered 

 with a silvery pubescence ; the fore tibia? dilated towards the apex ; the base of the 

 fore metatarsus incised ; the fore tarsi with a few short spines ; the tibial spines short ; 

 the long spur of the hind tibiae reaches nearly to the apex of the metatarsus. Wings 

 pale fuscous, the nervures pale ; the basal nervure not interstitial ; there are only two 

 cubital cellules, as in Planicejps ; the second cubital cellule large, narrowed at the top ; 

 the first recurrent nervure received close to the middle of the cellule, the second 

 beyond the second transverse cubital nervure; the anal nervure in the hind wings is 

 interstitial. There is a broad pale yellow band on the edge of the pronotum, a broad 

 one on the first and a smaller one on the second abdominal segment, and the spurs are 

 white. 



A very distinct species, remarkable for the deep incisions in the antennal joints, the 

 close converging of the eyes beneath, and the raised vertex. 



v 19. Pompilus (Aporus) smithiailUS. (Tab. XI. figg. 9, head; 9 a, wing.) 

 Niger, abdomine rufo ; alis fumatis. 

 Long. 7 millim. $ . 



Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith). 



Head and thorax pruinose. Eyes but very slightly converging at the top; the 



