358 Mr. R. E. Turner on Fossorial Ilymenoptera. 



broader tluan long, clofclied with delicate golden pubescence, 

 which extends on to the labrum. Antennae inserted more 

 than twice as far from the anterior ocellus as from the base 

 of the clypeus, each of the eight apical joints of the flagellum 

 very distinctly narrowed from the base to the apex. Front 

 distinctly raised above the base of the antennae, with a 

 shallow longitudinal sulcus not reaching the anterior ocellus. 

 Eyes strongly divergent towards the vertex, the inner margin 

 widely but very shallowly subemarginate. Front and vertex 

 smooth. Pronotum smooth, the dorsal surface short and 

 transverse ; parapsidal furrows of the mesonotum deep. 

 Median segment longer than broad, narrowed to the apex, 

 smooth and shining, convex. Pleural and abdomen sparsely 

 covered with very delicate pale golden pubescence ; abdomen 

 rather strongly compressed laterally; the first segment half 

 as long again as the apical breadth, narrowed to the base. 

 First abscissa of the radius shorter than the third, the latter 

 half as long as the second ; the third cubital cell receiving 

 the second recurrent nervure at one-third from the apex ; the 

 fuscous apical margin does not quite reach the third trans- 

 verse cubital nervure. 



Hah. Omilteme, Guerrero, 8000 ft. (//. H. Smith) ; July. 



Easily distinguished from ichneumonoides by the absence 

 of black markings, by the smooth front, the much shorter 

 clypeus, and the almost obsolete emargination of tlie eyes ; 

 from reversus by the very different form of the third cubital 

 cell, by the absence of a carina on the clypeus, and by the 

 shorter and broader first abdominal segment. 



4. Irenangelus tenuatus, Turn. 

 Ceropales tenuatus, Turn. Proc. Zool. Soc. London, p. 340 (1910). $ . 



Hah. Kuranda, Queensland. 



This species must be included in the genus, though differing 

 in the very long third cubital cell, which is twice as long on 

 the radius as the second, and in the absence of a raised space 

 above the base of the antennae. As in the other species, the 

 pronotum does not reach the tegulag. The neuration is very 

 similar to that of the genus Xanthampulex, but the frontal 

 prominence is absent. This prominence is much more deve- 

 loped in Xanthampulex than in Irenangelus, and, on the 

 whole, I think tenuatus is best placed in the latter genus. 



I agree with Ducke in considering this genus as allied to 

 Ceropales. I have previously expressed my opinion that 

 Xanthampulex should be placed near that genus. 



