HYMENOPTERA. 



119 



Genus 24. STENOTRITUS, n. g. 

 F. Smith's MSS. 



Head transverse, eyes lateral, elongate ; ocelli placed forwards 

 on the vertex in a curve ; the antennae inserted in the middle of 

 the face, the basal joint short and stout ; the superior wings 

 having one marginal and three submarginal cells, the first recur- 

 rent nervure received in the middle of the second submarginal 

 cell, the second recurrent nervure received in the middle of the 

 third submarginal ; the inner spine at the apex of the posterior 

 tibiae, as well as the single one at the apex of the anterior and 

 intermediate pairs, toothed like a comb, and very long, bent and 

 acute at the apex ; the posterior legs furnished with a floccus 

 and scopa ; the abdomen having an anal fimbria. 



Obs. The above characters it is hoped will serve to distinguish 

 this fine genus ; unfortunately the tongue had been extracted on 

 , some previous occasion. 



1. STENOTRITUS ELEGANS. 



Female. Length 6 lines. Head and thorax black, the former 

 closely punctured; the face and cheeks thickly covered with 

 ochraceous pubescence, the vertex with black. Thorax clothed 

 with a pale ochraceous pubescence, intermixed with fuscous on 

 the disk ; metathorax rounded behind ; wings fusco-hyaline, 

 clearer towards their base ; legs, above clothed with dark fuscous 

 pubescence, beneath it is of a silvery -white, very bright on the 

 scopa and floccus. Abdomen dark olive-green, the base fringed 

 with a nearly white pubescence ; on the three following segments 

 it is black, short and thinly scattered; the anal fimbria bright 

 fulvous ; beneath, the margins of the segments are fringed with 

 long fulvous pubescence. 

 Hab. Sydney, New South Wales. 



Genus 25. MELLITIDIA. 

 Mellitidia, Guerin, Voy. Coq. Zool. ii. 269. 



1. MELLITIDIA AUSTRALIS. 



Andrena Australis, Guerin, Voy. Coq. Zool. p. 269. 



Hab. Australia. 



