POMPILUS. 203 



apex. Abdomen longer than the head and thorax united, sessile, the apex sharply- 

 pointed and bearing a few longish hairs. Legs of moderate length ; the fore tarsi 

 with long comb-spines, and ciliated beneath, the base incised ; the tibial spines short ; 

 the long spur of the hind tibiae reaching beyond the middle of the metatarsus; the claws 

 with a basal tooth. The third cubital cellule is shorter above and beneath than the 

 second and is narrowed at the top, through the cubital nervure being elbowed. 



In the male the base of the femora is more or less black ; the antennae are about as 

 long as the head and thorax united, thick, the flagellum fuscous beneath, the third 

 joint shorter than the fourth; the abdomen is shorter than the head and thorax 

 united, and has a white band on the apex of the third segment. 



From Presidio de Mazatlan there is a small form (6 millim., 6 ) with the inner and 

 outer orbits pale yellow, and the four anterior legs and the hinder tarsi entirely black. 

 There is a difference, too, in the shape of the third cubital cellule, which is more 

 narrowed at the top ; the third transverse cubital nervure being straight and not 

 elbowed. 



Species 49-53 have black bodies, with the abdomen entirely red, or red in the 

 middle. 



49. Pompilus neotropicalis. 



Niger, abdomine, femoribus tibiisque postieis rufis ; alis fuliginosis. 5 . 

 Long. 14 millim. 



Hob. Guatemala, San Geronimo (Champion). 



Head almost opaque, alutaceous, from a little below the ocelli covered closely with 

 a whitish-silvery pubescence, the vertex bearing long, sparse, blackish hairs; eyes 

 distinctly converging and curved at the top ; the ocelli in a curve, the hinder ones 

 separated from each other by a somewhat greater distance than they are from the eyes ; 

 the sides of the clypeus rounded, the apex slightly incurved in the middle ; a straight 

 furrow leads down to the antennae. Antennae shorter than the body, pruinose : the 

 third joint distinctly longer than the fourth. Pronotum subquadrate, gradually 

 narrowed from the base to the apex, behind arcuate. Thorax opaque, alutaceous, 

 pruinose ; the scutellum concave, narrower and rounded towards the apex ; the median 

 segment rounded, thickly covered with a whitish pubescence intermixed with long 

 white hairs. Abdomen as long as the head and thorax united, petiolate, pruinose ; 

 the pygidium shining, impunctate, bare. Legs elongate ; the coxae with a whitish-silvery 

 pubescence ; the spines sparse, long ; the long spur of the hind tibiae reaching beyond 

 the middle of the metatarsus ; the fore tarsi with thin comb-spines. At the top the 

 second and third cubital cellules are subequal, at the bottom the second is longer than 

 the third ; the first transverse cubital nervure is received in the apical fourth, the 

 second in the middle of the cellule. - 



2dd2 



