150 CBABRO CKIBRARIUS. 



the collar smooth and shining, with a few scattered punctures ; 

 the mesothorax longitudinally striated,, with a central and two 

 lateral slight longitudinal carinse extending to the disk; the 

 scutellum shining, with a few scattered punctures ; at the base 

 of the metathorax, in the centre, is a small, shining, triangular 

 rugose space, from which a longitudinal incisure runs down- 

 wards to the apex, about midway dilating into a fossulet, on 

 each side of which it is longitudinally rugose-striate ; the collar 

 with an interrupted band and a spot on the scutellum yellow, 

 the latter sometimes obsolete ; the wings hyaline, their apical 

 margins clouded ; the tibiae and tarsi yellow, the anterior tibia3 

 with a black spot beneath ; the apical joints of the tarsi 

 slightly ferruginous, the anterior pair ciliated on the exterior, 

 all the tibife spinose. Abdomen ovate, with five yellow bands, 

 the second and third more or less interrupted. 



Male. Length 4^-7^ lines. The flagellum subfusiform, the first 

 five joints concave beneath, the fifth and three following ser- 

 rated on the exterior, the first and second fimbriated within ; 

 the collar longitudinally striated, as well as the scutellum ; the 

 collar sometimes has a yellow spot on each side ; the anterior 

 trochanters produced beneath at their apex into an obtuse 

 tooth, their femora compressed, irregularly dilated behind, and 

 having at their base a long, broad, irregular process convex 

 above, with a transverse ridge below just beyond the middle, 

 between which and the apex it is transversely concave, the apex 

 itself obliquely truncated, and at the base below, in front, a 

 long narrow spine ; the anterior tibiae dilated behind into an 

 ovate concavo-convex plate ; the tibiae with a black or piceous 

 litura at the knee, in front yellow, the plate slate-coloured, 

 fusco-piceous towards the exterior margin, the margin itself 

 testaceous, the superficies sprinkled with pale dots ; their tarsi 

 also dilated, the first irregularly triangular and concave above, 

 and the whole tarsus longitudinally carinated below towards the 

 front, the apical joint having the pulvillus placed near the ex- 

 terior claw ; the interior claw much the largest, its base below 

 produced into a broad flat fornicate appendage, the basal joint 

 rufo-testaceous, the rest piceous ; the intermediate femora 

 flattened within, and slightly dilated at their base behind. 

 Abdomen subcylindrical, curved downwards at its apex, with 

 seven yellow bands, the second and third interrupted ; the band 

 on the first segment sometimes wanting. 



Abundant, and universally distributed ; to be found in most 

 sandy districts during June, July, and August. This species 

 provisions its nest with Diptera, and burrows in the ground. 



