APID.E. 33' 



(18) 17. cJ with a sharp tooth on the basal 



segment beneath ; ?, scopa fulvous spisulosa. 



(17) 18. (^ with a broadly-elevated tubercle on 

 the second segment beneath ; ? , 

 scopa greyish leucomelaxa. 



0. rilfa, Linn, (hiconiis, Kirh.). — c? much smaller than 

 the $ . Head and thorax greenish black, in both sexes, 

 closely and finely punctured, clothed with pale brownish 

 hairs above, with paler beneath, face of the S with white, 

 face of the $ with black hairs, anteuuie in the J 

 long, reaching to the scutellum, not fringed with hairs 

 beneath, clypeus in the ? with a large horn-like process 

 on each side, more or less bifid at its apex, the inner tooth 

 produced and slightly bent towards the centre, mandibles 

 deeply grooved and rugosely punctured; wings slightly 

 clouded ; abdomen more or less bronzy, punctured, densely 

 clothed with orange coloured hairs, which are longer and 

 brighter in the cj, seventh segment in the (J narrowly 

 truncate, second ventral segment very long, punctured, 

 rounded at the apex, third visible only at the sides, its apical 

 margin widely emarginate, fourth with its apical margin 

 rounded and slightly reflexed, fifth just visible at the apex, 

 sixth hidden, slightly pointed, seventh corneous only at the 

 sides, the centre entirely membranous, eighth narrowly 

 pointed, armature with the stipites and sagittte long and 

 straight, the former dilated just before the apex, and hairy, 

 and then attenuated, $ with the scopa orange coloured, 

 legs clothed with brownish grey hairs, tibiie and tarsi 

 with orange. 



L. 10-15 mm. 



Very common and generally distributed ; the pubescence 

 soon fades into a dingy grey ; this species, as mentioned in 

 the remarks on the genus, is most variable in its habits of 

 nesting. 



0. pilicornis, Smith, (fuciformls. Smith). — Black, head 

 and thorax closely punctured, clothed in the c? with 

 grey hairs slightly tinged with brown, face in the ? 



