324 M. W. R. de V. GRAHAM 



in the handwriting of Nees " D.gb. glabella f. a. $. 12 Augt. 12"; another in 

 Westwood's handwriting " Eulophus glabellus Es. 2. 187. E Mus. Esenb. " The 

 specimen lacks both flagella ; it agrees with the description except that the colour 

 of the body is green rather than aeneous, and I designate it as LECTOTYPE. 



Tridymus laeviscuta Thomson. Syntypes, 7 specimens. LECTOTYPE, a female 

 labelled " Hbg " [Halsingborg] and " laeviscuta "; the specimen has been remoun- 

 ted by A. Jansson. 



Britain, Sweden, Germany ; uncommon. Occurs in the same habitats as 

 compressus. 

 Biology. Unknown. Imagines June-August. 



Gastrancistrus latifrons (Thomson) 



Tridymus latifrons Thomson, 1876a : 201, <$ $. 

 Gastrancistrus latifrons (Thomson) Dalla Torre, 1898 : 204. 



Type material. Syntypes on 31 pins. LECTOTYPE, a female labelled " O " 

 [Oland] ; the specimen has been remounted by A. Jansson and bears his lectotype- 

 label. " 



Britain, Sweden ; uncommon. 



Biology. Unknown. Imagines June-July. 



The PUNCTICOLLIS-Groxjp 



Gastrancistrus puncticollis (Thomson) 



(Text-fig. 264) 



Tridymus puncticollis Thomson, 1876a : 200, 3* ?. 

 Gastrancistrus puncticollis (Thomson) Dalla Torre, 1898 : 204. 



Type material. Syntypes on 23 pins. LECTOTYPE, a female standing seventh 

 in the series and bearing my lectotype-label. 



Britain, Ireland, Sweden. Fairly common in rough grassy fields and meadows. 

 Biology. Unknown. Imagines May-August. 



Gastrancistrus indivisus sp. n. 



(Text-figs. 205, 265) 



$. Head and thorax black with blue-green and bronze reflections ; gaster with similar but 

 weaker tints. Mandibles testaceous with darker teeth. Antennal scape and pedicellus black, 

 the latter sometimes testaceous beneath and at the apex ; flagellum fuscous, the clava sometimes 

 slightly paler distally. Coxae, and femora except their tips rather narrowly, concolorous with 

 the thorax ; trochanters more or less infuscate ; tibiae and tarsi testaceous, the tibiae often 

 slightly infuscate medially, the fifth tarsal segment more or less brown. Tegulae fuscous. 

 Wings greyish, the fore wing usually more or less infumate medially. Length i-6 to 2-1 mm. 



Head only slightly broader than the mesoscutum, in dorsal view 2-2 to 2-3 times as broad as 



