248 HYMENOPTERA ACULEA7A. 



L.9-11 mm. 



Cliobham ; Buxton. Bury St. Edmunds ; (Tack). 

 Norwich; (Bridgman). Rugby; (Morice). Oxford; 

 Dartmouth; Cbarlbury; (It. G. L. Perldns). Colchester; 

 (llarwood). Ardaniine, co. Wexford ; Skerries, co. 

 Dublin ; (//. K. G. Ciithhert). 



Although this is exceedingly like hch-ula,t\ie form of the 

 tubercle on the labrum is a well mai'ked ($ character, and 

 the more shining surface of the abdomen and its 

 differently coloured pubescence distinguish the ? . It is 

 only lately that I have had a good series of ^J fucata to 

 examine. I may say that Mr. R. C. L. Perkins has always 

 been in favour of keeping these forms distinct, but until 

 lately I have seen no reason for so doing. 



A. nigriceps, Kirh. {tridentata. S , Sound, nee Kirbij). — 

 Black ; face clothed in the c? with white hairs on the elypeus 

 with pale fulvous above it, in the ? entirely with black, 

 vertex in both sexes with fulvous, S with the tbird joint of 

 the antennae slightly longer than the fourth, labrum with a 

 strong subquadrate tubercle deeply notched beneath ; 

 thorax in both sexes clothed with bright fulvous hairs, 

 which are redder and denser in the ? , surface of the meso- 

 notum and especially of the scutellum, where seen between 

 the hairs in the (J, shining, wings nearly hyaline, propodeum 

 dull, finely rugulose and punctured, its basal area defined by 

 a shining smooth line ; abdomen dull, rather strongly punc- 

 tured, densely clothed with suberectpale hairs in the c?, the 

 hairs denser towards the apex of each segment, formingdistinct 

 pale apical bands, those towards the base subfulvous in very 

 fresh examples, fifth and sixth with blackish hairs at the 

 base; ? with more distinct pale fulvous bands on all the 

 segments, the hairs at the base of the third and fourth 

 segments erect and black, apical fringe dense and black, 

 the hairs projecting at the sides, segments beneath fringed 

 with long white hairs in the S , with black in the ? , apical 

 ventral valve of the c? rather broad at the apex, sixth only 



