142 M. W. R. de V. GRAHAM 



Key to European and North American Species 



(Females) 



i Mesoscutum with notauli usually incomplete, sometimes traceable as far as the 



hind margin but then very superficial posteriorly. Occiput finely ridged 

 transversely at least behind the ocelli. Basal tergite of gaster smooth. 

 Fore wing with basal cell pilose over at most its distal third vulgaris Walker (p. 142) 



Mesoscutal notauli complete, distinct throughout. Occiput not ridged . . 2 



2 (1) Thorax weakly arched dorsally. Vertex moderately strongly reticulate, 

 duller. Fore wing with speculum closed below ; distal half or more of 

 basal cell pilose. Basal tergite of gaster alutaceous at least anteriorly. 

 (Europe) ........ britteni Askew (p. 143) 



Thorax strongly arched dorsally. Vertex alutaceous, shiny. Fore wing with 

 speculum open below ; about the distal third of basal cell pilose. Basal ter- 

 gite of gaster smooth. (North America) . . glasgowi Crawford (p. 143) 



(Males) 



1 Mid tarsi black, their fifth segment enlarged and subcordiform. Terminal 



segment of maxillary palpi distinctly clavate. Notauli usually incomplete, 

 sometimes traceable as far as the hind margin of the mesoscutum but then 

 very superficial posteriorly. Occiput with a fine transverse ridge at least 

 behind the ocelli ....... vulgaris Walker (p. 142) 



Mid tarsi at least mainly testaceous, their fifth segment not enlarged. Ter- 

 minal segment of maxillary palpi hardly clavate. Notauli complete, 

 distinct throughout. Occiput not ridged ...... 2 



2 (1) Thorax weakly arched dorsally. Fore wing with speculum closed below. 



Vertex more strongly sculptured .... britteni Askew (p. 143) 



Thorax strongly arched dorsally. Fore wing with speculum open below. 



Vertex less strongly sculptured .... glasgowi Crawford (p. 143) 



Cyrtogaster vulgaris Walker 



Cyvtogaster vulgaris Walker, 1833 : 382, <J 9. 



Cyrtogaster thoracica Walker, 1833 : 382, <j>. 



Cyrtogaster rufipes Walker, 1833 : 383, q* ?. 



Cyrtogaster tenuis Walker, 1833 : 384, $. 



Cyrtogaster cingulipes Walker, 1833 : 384, $. 



Dicormus aquisgranensis Forster, 1841 : 38, o*. 



? Cyrtogaster Poesos Walker, 1848 : 107, 164, $. 



Lamprotatus Acarnas Walker, 1848 : 111, 168, $, syn. n. 



Cyrtogaster biglobus Forster, 1861 : 33, <£. 



Sphegigaster degener Walker, 18726 : 117, $, syn. n. 



Cyrtogaster vulgaris Walker ; Askew, 1965 : 179-180, 184, $ $. 



Type material. Cyrtogaster vulgaris Walker. Syntypes, 6 $, 4 £. None of the 

 females agrees perfectly with the description. LECTOTYPE, a $ (tenth in series), 

 bearing a Waterhouse label. 



Cyrtogaster thoracica Walker. Syntypes, 2 $. LECTOTYPE, the second speci- 

 men, bearing a Waterhouse label. 



Cyrtogaster rufipes Walker. Syntypes, 7 $, 2 <$. LECTOTYPE, a <$, bearing a 

 Waterhouse label. 



