368 Mr. P. Cameron on new Species of 



The females of the two species known to me in nature may 

 be recognized as follows: — 



a. Lower surface of first caudal segment coarsely 



granular, its median keels granular Ilerhstii, Thor. 



(Guiana.) 



b. Lower surface of first caudal segment smooth, 



punctured, without granules, its keels obso- 

 lete Gervaisii, Poc. (Ama- 

 zons.) 



B, paraensis, Sim., from Para, based probably upon a 

 female, differs from the above in having the carapace entirely 

 devoid of granules ; while S. granulatus, on the contrary, 

 from Cayenne, the type of which is doubtless a male, is not 

 from the description distinguishable from the males identified 

 as Herbstii in the Museum collection. 



XXXIV. — Neiv Species of Hymenoptera from Central 

 America. By P. Cameuon, F.E.S. 



[Concluded from p. 276.] 



Fam. Sphegidaj. 



Podium. 



Podium crassipesj sp. n. 



Kigrum : :dis fuliginosis. J . 

 Long. 40 millim. 



Ilah. Mexico, Omealca, near Orizaba (.1/. Tr)ijillv). 



Antennte reaching to the scutcllum, bare, pruinose. Head 

 below the ocelli witii widely separated punctures ; the front 

 tiiickly covered with long black hair; the vertex glabrous; a 

 narrow thin furrow leading to the ocelli, uniting to a short, 

 shallow, narrow transverse one behind them ; there is a 

 narrow longitudinal keel above the ocelli. The antennaj are 

 inserted immediately over tlie clypeus, which at the ape.\ 

 projects, is roundly concave, and is roundly and rather 

 dee))ly incised, and bears a i'ew shallow j)unctures. The eyes 

 reach to the ba.se of the mandibles and converge slightly 

 above. The protliorax is elongate, being nearly as long as 

 the mesonotum ; the anterior is separated from the longer 

 posterior portion by a deep transverse furrow, its centre being 

 raised behind; the anterior region is punctured and bears 

 long black hairs, the punctureless part of the posterior portion 



