rOMPILID.E. 63 



and tlie posterior wings with the posterior nerve united 

 with the median exactly where the branch of the latter 

 is emitted, whereas in the other species the posterior 

 unites with the median at a point nearer the abdomen than 

 the juncture of the median nerve with its branch. 



The $ may be known further by the unusual abundance 

 of its sheeny pubescence, by the fourth, fifth and sixth 

 ventral plates of the abdomen being longitudinally con- 

 cave, the fourth slightly, the fifth deeply emarginate at the 

 apex, beyond the fifth appear three lobes, of these I think 

 the central one belongs to the sixth segment and the lateral 

 ones to the seventh, apical valve rounded at the apex, 

 simple. 



? with the clypeus very smooth and shining in front, its 

 margin not raised at the sides, and with only two stiff 

 sotoe projecting from above the glabrous margin ; abdomen 

 with its apical dorsal valve densely clothed with black 

 bristly hairs ; anterior tarsi pectinated. 



L. cJ 8 mm., ? 10-12 mm. 



Chobham ; Woking; Southwold; Deal; Bournemouth. 

 Colchester; {Harwood). hondouDistvict ; {F. Smith). Port- 

 land; New Forest; Bristol; {Dale). Lowestoft; [Morice). 

 Camber; (Frinbi/). Laud's End; {Marqunnd). 



P. gibbus, Fab. — Like the other red-bodied species in 

 colour; posterior emargiuation of pronotum very sharply 

 angular ; posterior wings with the branch of the median 

 nerve not uniting with the posterior. 



^ fourth and fifth ventral plates not concave, fifth almost 

 entire at the apex, sixth notched, with an impression on 

 each side of the notch, apical valve convex, rounded at 

 the apex, with a few longer, pendant, apical hairs. 



$ clypeus with its apical margin slightly sinuate, and 

 more or less raised towards the sides, largely and irregularly 

 punctured, with a series of long setic above the margin ; 

 head and pronotum with scattered, bristly hairs, cheeks 

 behind the eyes not so hairy as in the following species; 



