POMPILITS. 195 



pilose, tapering a little towards the apex, and with the third joint rather longer than 

 the fourth ; the third ventral segment slightly pilose, the fourth and fifth densely- 

 covered with long black hairs ; the apical segments with short hairs ; and the fourth 

 segment at the apex broadly incised. 



The resemblance of this species to P. interstitialis is very close ; but they may be 

 separated by P. interstitialis having the third cubital cellule longer than the fourth 

 (the reverse being the case in P. alticola), by the mass of bristle-like hair being absent 

 (in P. alticola the apical segment bears long sparse hairs all over it), and by the long 

 spur of the hind tibiae being fully three-fourths the length of the metatarsus (in 

 P. alticola it reaches just beyond the middle). In P. interstitialis the basal nervure 

 mav be said to be interstitial. 



26. Pompttus toluca. (Tab. XI. figg. 14, head; 14 a, wing.) 

 Long. 13 millim. 



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



In colour, sculpture, and size, and in having the basal nervure not interstitial, this 

 species agrees with P. alticola ; but it is a much stouter species, having a broader 

 body, and has a different neuration (compare figures). It is, however, more particularly 

 to be known from P. alticola by the long spur of the hind tibiae not reaching the 

 middle of the metatarsus, by the absence of the dense tufts of hair on the ventral 

 surface of the abdomen, and by the penultimate ventral segment being deeply incised 

 at the apex. Clypeus almost transverse at the apex ; the hinder ocelli separated from 

 each other by a less distance than they are from the eyes ; front with an indistinct 

 furrow. Prothorax as long as the head ; the apex angulated. Median segment with 

 a not very distinct furrow at the base. Abdomen as long as the head and thorax 

 united ; the apex above and beneath with long hairs. 



27. Fompilus interstitialis. (Tab. XL fig. 15, wing.) 



Long. 12 millim. 



Hab. Panama, Volcan de Chiriqui 2000 to 3000 feet (Champion). 



Head subopaque, indistinctly punctured, bearing long black hairs, behind trans- 

 verse ; the eyes a little converging beneath ; the hinder ocelli separated from each 

 other by a less distance than they are from the eyes ; clypeus projecting, the apex 

 broadly rounded, the apical portion finely punctured. Pronotum broader than long, 

 ano-ulated at the apex. Median segment with a gradually rounded slope to the apex, 

 and bearing longish black hairs. Abdomen subsessile, shining; the pygidium and 

 ventral surface bearing long black hairs. Legs long, of moderate stoutness ; the long 

 spur of the hind tibiae reaching beyond the middle of the metatarsus ; the tibiae beneath 

 moderately spinose. For neuration, see Tab. XL fig. 15. 



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