British Hijiiienoptera. 223 



on all the segments ; basal segment very convex, nar- 

 rowly and deeply impressed at the apex ; 2nd segment 

 depressed at the extreme base, then very convex and 

 impressed again at the apex, which is pale and some- 

 what membranous ; 2nd and following segments clothed 

 with greyish hairs; segments beneath fringed with whitish 

 hairs; (for genitalia see pi. ix., fig. 20). Legs entirely 

 black, clothed with greyish hairs. 



? . Narrower than any of the preceding species ; 

 face rather elongate ; mesothorax largely punctured, with 

 a very deep dorsal line in front ; metathorax rugose at 

 the base, but not shining at the apex as in the c? ; basal 

 segment of abdomen very shining, with a few scattered 

 punctures ; 2nd and following closely punctured, and 

 clothed with greyish hairs ; segments beneath with long 

 hairs. Legs clothed with greyish yellow hairs. Length 

 5 — 5^ mm. 



Hab. Common and generally distributed. 



The small size and narrow form of the $ readily dis- 

 tinguish it from its allies ; the ^ is abundantly distinct 

 by its black tarsi and the shape of the 1st and 2nd 

 abdominal segments. 



Division VL 



Tibiffi and tarsi of ^ yellow ; 2 ^^^^ the abdomen 

 densely hairy, with paler apical bands to the 

 segments. 



Hairs of the thorax in J fulvous ; pubescence of 

 head and thorax very dense. ^ ; antenna not 

 nearly so long as body . . . . . . . . graminem. 



Hairs of thorax in J whitish ; pubescence of head 

 and thorax not dense. ^ ; antennae as long as 

 body . . . . . . . . . . . . tuinttlonun. 



Tibia; of ^ not yellow ; $ with the abdomen not 

 densely hairy ; no pubescent apical bands to 

 the segments. 



Abdomen with a bright asneous tinge . . Snieatlunanelhin. 



Abdomen black, or nearly so. 



^ tarsi black ; surface of thorax in both sexes 

 not very shining ; the intervals between the 

 punctures, under a strong power, seen to be 

 finely rugose or scratched ; face subelongate murio. 

 (7) 8. (^ tarsi whitish ; surface of thorax in both sexes 

 shining, and quite smooth between the punc- 

 tures ; face subrotundate . . . . . . lettcopiif!. 



