3J:8 Mr. R. E. Turner on Fossorial Tlymenoptera. 



Apical joint of the antennae conical ; teeth of 

 the clypeus either absent or very small .... 4. 

 4. Teeth of the clypeus wholly absent; colour 



greenish blue S. claviger, Kohl. 



Teeth of the clypeus very small, abdomen bronze. S. relucens, iSm. 



6 6. 



1. Antennae thirteen-jointed ; median segment with 



a distinct semicircular basal area ; a spine on 

 each side of the median segment near the 

 base ; second ventral segment with a strong 



transverse carina S. ahiormis, Turn. 



Anteunje twelve-jointed ; median segment with- 

 out a distinct basal area or lateral spines ; 

 second ventral segment without a carina. ... 2. 



2. Scutellum and base of first dorsal segment 



strongly subtuberculate IS, cJuilybaits, Sm. 



Scutellum and base of first dorsal segment not 

 subtul)erculate 3. 



3. Club of auteunse very thick, obliquely truncate 



at the apex; joints 3-G of the flagellum 



toothed beneath *S'. viridis, Sauss. 



Club of antennaj conical ; joints of the flagellum 



not rounded or toothed beneath S. relucens, Sm. 



Sericophorus cludi/hoius, Sm, 



Sericophonis chalyhceus^ Sm. Ann. & Mag. Nat. Hist. (2) vii. p. 32 

 (1851). $. . ^ . . 



Tacltyrrhosius cyaneus, Sauss. Mem. soc. phys. & hist. nat. Geneve, xiv. 

 p. *26 (18-54). $ . 



5. Cyanea; antemiarum flagello, femoribus apice, tibiis tarsisque 



rufo-testaceis ; alis hj-alinis, venis nigris. 

 6 . Eeminae similis ; femoribus omnino rufo-testaceis. 

 Long., $ 11 mm,, 6 7 mm. 



$ . Clypeus broadly rounded at the apex, with Iwo teeth 

 on each side of the median lobe of the clypeu-s on the apical 

 margin ; penultimate joint of the antennae very little broader 

 than long, the apical joint a little longer than the breadth at 

 the base, subconical, hollowed on the inner side at the apex. 

 Front with a short longitudinal carina situated about halfway 

 between the anterior ocellus and the base of the clypeus ; 

 posterior ocelli nearly twice as far from each other as from 

 the eyes. Mesonotum with four distinct shallow grooves 

 from the anterior margin reaching nearly to the middle of 

 the segn)ent; scutellum strongly convex and subtuberculate 

 in the middle ; median segment with a longitudinal sulcus 

 from base to apex, in which lies a low carina. First dorsal 

 segment subtuberculate in (he middle at the base. The 

 posterior truncation of the median segment rather irregularly 

 transversely striated. Second cubital cell almost pointed on 



