PTEROMALIDAE OF N.W. EUROPE 309 



latter lacking the head. LECTOTYPE, the female, bearing a Waterhouse label ; 

 it is almost certainly the same as laticornis. 



G. laticornis Walker. Syntypes, 3 $, 1 $. LECTOTYPE, the female, bearing a 

 Waterhouse label. 



Britain ; not uncommon. 



Biology. Unknown. Imagines April- June. 



Gastrancistrus terminalis Walker 

 (Text-fig. 261) 



Gastrancistrus terminalis Walker, 1834 : 176, <J $. 



Type material. Five specimens, but one is probably not original material. 

 LECTOTYPE, a female bearing a Waterhouse label, also one in C. Ferriere's hand- 

 writing " Type C.F.". 



Britain, apparently rare ; " June ; on grass beneath trees ; Windsor Forest, and 

 near London " (Walker, 1834 : I 76) ', Berkshire, Wytham, 17. vi. i960, 1 $ (R. R. 

 Askew) ; Middlesex, Southgate, $$, 11. vi. 1965, 1 $, 24. vi. 1966 (Graham). 



Biology. Unknown. 



Gastrancistrus hirtulus sp. n. 



$. Head and thorax greenish with some brassy and bronze reflections ; frons, and sometimes 

 genae, coppery ; gaster violet-bronze-black. Antennae blackish ; scape weakly metallic. 

 Coxae, and femora except their tips narrowly, black with a metallic tinge ; tibiae fuscous, 

 narrowly testaceous at their base and apex ; fore tarsi brownish, mid and hind ones testaceous 

 with their fifth segment fuscous. Tegulae brownish. Wings faintly greyish ; venation fusco- 

 testaceous. Length (including ovipositor) 1-4 to 1-9 mm. 



Head about 1-35 times the breadth of the mesoscutum, in dorsal view about 2-25 times as 

 broad as long ; temples very short and receding ; ocelli in a triangle whose base is about 2-7 

 times its height, POL nearly twice OOL. Eyes separated by about 1 -35 times their length, with 

 extremely short inconspicuous pubescence ; malar space slightly more than one quarter the 

 length of an eye ; breadth of oral fossa about 3-5 times the malar space ; clypeus fully three 

 times as broad as long, its anterior margin produced but truncate medially (as in vagans, Text- 

 fig. 260) or even weakly though broadly emarginate ; mandibles not large, their outer tooth the 

 longest, the others decreasing slightly in length ; clypeus nearly smooth ; face, cheeks, and 

 frons, shiny, with delicate hardly raised sculpture ; vertex less shiny, with very fine, slightly 

 raised reticulation. Antennal scape short, its length about equal to the transverse diameter of 

 an eye, not reaching the median ocellus, about 3-5 times as long as broad ; combined length 

 of pedicellus and flagellum slightly less than the breadth of the head ; pedicellus about 1-7 

 times as long as broad, slightly to very distinctly longer than the first funicular segment ; 

 funicle proximally very slightly stouter than the pedicellus, thickening distad ; first funicular 

 segment quadrate to slightly transverse, the second slightly transverse, and the following 

 segments rather more so, the fifth being about 1-5 times as broad as long ; clava about twice 

 as long as broad, nearly as long as the three preceding funicular segments together ; flagellum 

 with rather conspicuous, somewhat outstanding bristles. 



Thorax about 1-4 times as long as broad. Mesoscutum about i-8 times as broad as long, 

 shiny, with fine and very delicate sculpture which is about level with the general surface, 



