PTEROMALIDAE OF N.W. EUROPE 251 



4 (3) Anterior margin of clypeus slightly produced, but almost truncate medially ; 



metapleuron narrowing to a point dorsally and not reaching the cavity from 

 which the hind wing arises .... ORMOCER US Walker (p. 252) 

 Anterior margin of clypeus evenly and quite strongly curved forwards ; 

 metapleuron narrowing less strongly dorsad and reaching the cavity from 

 which the hind wing arises .... PMEROMALUS Walker (p. 328) 



5 (1) Antennae with six funicular segments (formula 11 263 ; both anelli very 



distinct). Postmarginal vein of fore wing somewhat longer than the mar- 

 ginal vein. Metapleuron narrowing to a point dorsally and not reaching the 

 cavity from which the hind wing arises . ORMOCERUS Walker (p. 252) 



Antennae with five funicular segments (formula n 153 or 11 253). Post- 

 marginal vein of fore wing usually shorter than or about as long as, rarely a 

 little longer than, the marginal vein. Metapleuron (except in Bugacia) 

 narrowing less strongly dorsad and reaching the cavity from which the 

 hind wing arises ........... 6 



6 (5) Pronotal collar margined at least in the middle ; metapleuron narrowing to 



a point dorsally and not reaching the cavity from which the hind wing 

 arises. Vertex usually with a transverse ridge or elevation behind the 

 ocelli. Antennal formula 11163 ino\ 11153 in ? . BUGACIA Erdos (p. 264) 



- Pronotal collar immarginate, rounded off in front ; metapleuron narrowing 



only slightly dorsad and reaching the cavity from which the hind wing 

 arises. Vertex without a ridge or elevation ...... 7 



7 (6) Antennae inserted low on the head, the lower edge of their toruli at most very 



slightly above the level of the ventral edge of the eyes, usually lower than 

 this ; usually only one anellus visible in dried specimens, the other anellus 

 (if present) being almost always minute, and discoid (Text-figs. 199-200, 

 209-211, 221, 223-225, 229, 239-247, 257). Clypeus convex, its anterior 

 margin more or less curved forwards, though sometimes with an emargin- 

 ation in the middle of the curve, (Text-figs. 214-216). Mandibles, except 

 in Oxyglypta, with four teeth. Scutellar frenum more or less distinctly 

 marked off, at least by a very fine line. Male antenna usually with six 

 funicular segments and a two-segmented clava ; rarely six funicular seg- 

 ments and a three-segmented clava ....... 8 



- Antennae inserted higher, the lower edge of their toruli well above the level 



of the ventral edge of the eyes ; two anelli clearly visible in dried specimens 

 (Text-figs. 189-194). Clypeus fiat or nearly so, sometimes with a slight 

 depression before its anterior margin, which is truncate or slightly curved 

 forwards. Both mandibles with three teeth. Scutellar frenum not, or at 

 most very indistinctly, marked off. Male antenna nearly always with five 

 funicular segments and a three-segmented clava (Text-figs. 189, 190, 193) 

 (with six funicular segments and a two-segmented clava in Semiotellus 

 fumipennis ; with five funicular segments and an apparently four-seg- 

 mented clava in Sy stasis annulipes) . . . . . . . 10 



8 (7) Mesoscutum with sculpture composed of transverse ripples or striae. Both 



mandibles with three teeth. Body black with at most obscure metallic 

 reflections. Median carina of propodeum fine, neither raised into a tubercle 

 medially, nor traversed by a crest. Hypopygium of female extending two 

 thirds or slightly more than two thirds length of gaster, but without a mucro 

 at apex OXYGLYPTA Forster (p. 265) 



- Mesoscutum reticulate, at most with a trace of transverse rippling in front, in 



the latter case the body is distinctly metallic. Both mandibles with four 

 teeth ............ 9 



