198 HYMENOPTERA. 



alutaceous, the apex rounded broadly. Antennae stout ; the third joint very distinctly 

 longer than the fourth. Pronotum broader than long, with a distinct neck at the 

 head ; behind arcuate. Median segment pruinose, with a gradual slope to the apex, 

 indistinctly furrowed in the middle. Abdomen subsessile, not longer than the head 

 and thorax together ; the pygidium and ventral surface with long black hairs. Legs 

 long, stout, the tibial spines moderate ; the long spur of the hind tibiae not reaching 

 to the middle of the metatarsus; the tarsi beneath thickly spinose. For neuration y 

 see Tab. XI. fig. 19 a. 

 I 



v 32. Pompilus unicolor. 



Pompilus unicolor, Smith, Descr. of New Species of Hymen, p. 154 (1879) l . 



Hab. Guatemala, Guatemala city 5000 feet (Salvin l ). — Ecuador, Guayaquil l . 



Appears to be very closely related to P. philadelphicus. 



•v 33. PompHus acapulcoensis. 



Long. 10 millim. 



Hab. Mexico, Acapulco in Guerrero (H. H. Smith). 



Also related to P. imperialism but though the body is velvety it is of a very dull 

 blue ; and differs from it further in having the antennae longer, with the third and fourth 

 joints subequal. Eyes converging beneath ; the ocelli almost in a triangle, the hinder 

 ones separated from each other by a much less distance than they are from the eyes ; 

 clypeus rounded at the apex, bluntly so in the middle. Antennae longer than the 

 thorax, slightly tapering towards the apex, the joints closely united, covered with a 

 dense pile ; the third and fourth joints subequal. Head rather densely covered with 

 long blackish hairs, the cheeks more densely clothed with silvery hairs. Prothorax 

 hardly so long as the head, arcuate at the apex. Median segment without a furrow. 

 Abdomen as long as the head and thorax united. Legs stoutish ; the tibial spines 

 long ; the long spur of the hind tibiae reaching nearly to the apex of the metatarsus ; 

 claws apparently simple. The third cubital cellule triangular ; the second recurrent 

 nervure interstitial. 



Apart from the difference in the neuration, P. acapulcoensis may be known from 

 P. championi by the much longer hind tibial spurs (these in the latter not reaching 

 much beyond the middle of the metatarsus), by the body being velvety, and by the 

 antennae being longer than the thorax. 



^ 34. Pompilus leona. (Tab. XL fig. 20, wing.) 



Long. 9 millim. tf . 



Hab. Mexico, Xucumanatlan in Guerrero 7000 feet (H. H. Smith). 



Dark blue, faintly whitish-pruinose ; the head and thorax with a few longish hairs. 



