182 HYMENOPTEKA. 



Median segment short, rather sharply rounded towards the apex. Abdomen almost 

 shorter than the thorax and as broad as it ; the sides of the segments with a silvery 

 pile ; the apical segment opaque, alutaceous, covered with long brownish hairs ; the 

 apex rounded, pale. Legs densely silvery-pruinose ; the hind tibiae and tarsi thickly 

 and sharply spined ; the long spur of the hind tibiae reaches a little beyond the 

 middle of the metatarsus ; the claws with one stout straight tooth. Wings : radial 

 cellule elongate, sharply lanceolate from the second transverse cubital nervure ; the 

 second cubital cellule at the top a very little, at the bottom considerably, shorter than 

 the third ; the first transverse cubital nervure oblique, slightly elbowed at the bottom, 

 the second a little curved, the third still more curved ; the first recurrent nervure is 

 received beyond, the second in front of, the middle of the cellule ; the first cloud 

 extends along either side of the basal nervure and is as wide as the tops of the second 

 and third cubital cellules united, the second extends from the first to the third 



transverse cubital nervures. 



/ 



J 

 19. Salius nivalis. (Tab. XI. figg. 2, head: 2 «, wing.) 



Caeruleus ; alis fusco-violaceis. $ . 

 Long. 14 millim. 



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



Head almost opaque, very finely punctured, and bearing a few longish black hairs. 

 Eyes with a curve at the top, somewhat converging beneath. Ocelli almost forming a 

 triangle, the hinder ones separated from the eyes by about twice the distance they are 

 from each other ; an obscure furrow runs down from them. Clypeus with the sides 

 obliquely truncated, the truncated lateral parts being nearly as long as the apical part, 

 which is bluntly rounded. Occiput almost transverse, the sides rounded. Prothorax 

 as long as the head, the base forming a distinct neck, the sides rounded, the apex 

 bluntly arcuate. Thorax with the pro- and meson otum somewhat shining, and 

 punctured like the head ; the rest of the thorax opaque, alutaceous, and almost black. 

 Median segment with a rounded slope, obscurely transversely striolated. Abdomen 

 petiolate, very smooth and shining, almost shorter than the thorax, the apex sharply 

 pointed ; the pygidium covered with longish black, at the apex with fuscous, hair. 

 Antennae moderately long, filiform, black. Legs black, rather long ; the tibiae with a 

 double row of short thin spines, not serrate, the long spur of the hind pair not reaching 

 to the middle of the metatarsus ; the claw with a short spine near the base. For 

 wings, see Tab. XI. fig. 2 a. 



^ 20. Salius impiger. 



Pompilus impiger, Cresson, Proc. Bost. Nat. Hist. Soc. xii. p. 371 \ 

 Hab. Mexico, Orizaba (Sumichrast 2 ). 



