154 Mr. Bridginan's additions tu Mr. Marshall's 



reaching to the base ; metathorax rather long, the arese 

 indicated by very fine lines ; supero-medial area hexa- 

 gonal, longer than wide, not closed above, or rarely so ; 

 lateral areas divided, posterior transverse line slightly 

 defined ; postero-medial area not defined. Abdomen 

 elongate, cylindrical, not wider than the thorax, and as 

 long as the head and thorax ; the 3rd and 4th segments 

 slightly the widest ; 1st segment tapering from base to 

 apex, varying in width at the apex from twice to three 

 times the width of the base, the segment of normal 

 length, the spiracles projecting, situated in the centre of 

 the segment, a shallow groove in the middle, with faint 

 keels not extending to the apex ; 2nd segment rather 

 longer than wide ; 3rd subquadrate ; the remainder 

 transverse. Legs slender. Areolet of wings penta- 

 gonal, when the outer nervure is present longer than 

 wide, rather narrow above ; external inferior angle of 

 the discoidal cell opposite the corresponding angle of 

 the areolet, if not a little beyond ; stigma rather short, 

 twice as long as wide ; radial cell short and deep ; trans- 

 verse ordinary nervure not interstitial ; transverse dis- 

 coidal divided nearly one-third from the bottom ; trans- 

 verse anal nervure of hind wing nearly straight, inter- 

 rupted below the middle ; emitting nervure subobsolete. 

 Black ; legs red ; front coxae sometimes entirely red, 

 or the base black ; middle coxae red, or more or less 

 black ; hind ones entirely black, or apex red ; all the 

 trochanters more or less marked with brown ; middle 

 femora sometimes with a fuscous stain above at the 

 apex ; hind femora with a more or less distinct fuscous 

 line above ; hind tibiae with the apical half more or less 

 distinctly stained with fuscous above, less so beneath, 

 and a fuscous mark above before the base, this some- 

 times almost entirely absent ; middle and hind tarsi 

 fuscous, sometimes apex of front ones ; mouth and 

 under side of scape of antennae sometimes piceous-red ; 

 stigma fuscous ; nervures of front wings fuscous, hind 

 ones pale ; base of wings and tegulae pale. Length, 

 4*5 mm. 



These males I took by sweeping in the beginning of 

 August, 1882, at Household, near Norwich, but unfortu- 

 nately took no female that might belong to the same 

 species ; they had evidently only just emerged from the 

 pupa. I have no doubt but that they are males of one 

 of the black Pezomachus, two species of which, with 



