138 HVMENOPTERA ACULEATA. 



(Sdbg. BLEPHARIPUS.) 



C. dimidiatUS, Fah. — Head black, punctured, man- 

 dibles pitchy in the (J, yellowish in the ? , cheeks produced 

 into a blunt tooth at the base of the mandible in the c?, 

 scape of the autenuce in the ? entirely yellow or nearly 

 so, flagellum pilose beneath in the S , vertex very shining, 

 deeply impressed longitudinally on each side between the 

 eyes ; pronotum with a transverse yellow spot on each side, 

 mesonotum somewhat shining and shallowly punctured in 

 the (?, dull, finely and closely punctured in the ? , clothed 

 with scattered hairs, the scutellum sometimes yellow, post- 

 Bcutellum generally yellow, propodeum with its basal area 

 shining, crenate at the base, surrounded by an impressed 

 line, and widely sulcate down the centre, sides beyond the 

 area hairy ; abdomen black, shining, subpetiolated, with 

 yellow lateral spots on the segments, sometimes connected 

 into transverse bands, the basal segment in the ? some- 

 times entirely yellow, and the second fourth and following 

 segments often entirely black in the (J, basal segment 

 about once and a half as long as its apical width, sixth dorsal 

 segment in the ^ produced at its posterior ventral angle 

 into a blunt black spine, these spines appear as ventral 

 tubercles at the base of the seventh ventral segment, 

 apical dorsal valve in the ? largely punctured ; legs with 

 the femora black, more or less yellow beneath, especially in 

 the (?, tibiae and tarsi yellow in the ? , the former in the c? 

 black posteriorly, and the hind pair almost entirely black, 

 tarsi pitchy, tibiiB spinose in both sexes. 



L. 12 mm. 



A very variable species in colour. Common in the North 

 and West, but rarer in the South and East; Maidstone 

 and Hastings ; {Frishy). Yorkshire; (Smith). Gloucester- 

 shire, breeding in posts and stumps, and preying on large 

 blue-bottle flies; (V. R. Perlnns), Devonshire, common; 

 and received from sevei-al localities in Scotland. 



