316 M. W. R. de V. GRAHAM 



dorsally in the proximal half or more ; funicle becoming brownish distally, the clava brown. 

 Coxae, and femora except their tips narrowly, concolorous with the thorax ; trochanters partly 

 dark ; legs otherwise testaceous with the mid and hind tibiae at least broadly infuscate medially, 

 usually fuscous except their bases and tips, the fore tibiae sometimes infuscate medially ; tips 

 of tarsi fuscous. Tegulae brown to fuscous. Wings subhyaline ; venation brownish tes- 

 taceous, the parastigma and stigma sometimes darker. Length i -4 to 1 -6 mm. 



Differs from hemigaster sp. n. as follows : 



Body rather less squat ; head in dorsal view 2-15 to 2-3 times as broad as long ; POL 1-4 to 

 1 "j OOL ; breadth of oral fossa 2-7 to 3 times the malar space, the latter slightly longer than in 

 hemigastev, though less than half as long as an eye. Antennae with combined length of pedi- 

 cellus and fiagellum distinctly less than breadth of head ; funicle proximally not or hardly as 

 stout as the pedicellus, but thickening distad so as to be strongly clavate ; first funicular 

 segment quadrate to slightly longer than broad, second quadrate to very slightly transverse, 

 the remaining segments transverse, the fifth about 1-7 times as broad as long. Mesoscutum 

 only i-6 to 1-7 times as broad as long. Scutellum with two pairs of bristles, in one female with 

 an additional bristle anteriorly on one side. Propodeum medially about one quarter as long 

 as the scutellum or rather more, a little more distinctly alutaceous. Hind coxae bare dorsally. 

 Fore wing with marginal vein 2 to 2-3 times as long as the stigmal vein, and 1-7 to 1-9 times as 

 long as the postmarginal ; space between the postmarginal and stigmal veins, on upper sur- 

 face of wing, pilose ; stigma subrectangular. Gaster slightly narrower than the thorax, 

 excluding the ovipositor sheaths 1 -55 to 1 -8 times as long as broad. 



o*. Unknown. 



v Holotype $. England : Berkshire, Bagley Wood, 13.vii.1957, on Norway 

 Spruce (Picea abies (L.) Karst.) (Graham), in Hope Department, University Museum 

 Oxford. 



Paratypes. England : Oxfordshire, Bald Hill, near Lewknor, 1 $, 8.VL1958, 

 swept from chalk-do wnland vegetation (Graham) ; Lancashire South, Freshfield, 

 1 $, 28. vi. 1962, from foliage of Quercus robur L. (Graham). Scotland : Mid Perth, 

 Killin, 1 $, 24.vii.1954, from foliage of Quercus (Graham), in Graham collection. 



Biology. Unknown. 



Gastrancistrus laticeps sp. n. 



(Text-fig. 262) 



$. Head and thorax usually bright green, in an Irish female bronze-green, the head tending 

 to be more blue-green, especially on the vertex ; basal half or less of the scutellum, and some- 

 times the axillae partly, bronze ; gaster dorsally more or less green or blue-green in the basal 

 half, sometimes only the basal tergite, the remainder purplish bronze. Antennal scape test- 

 aceous, sometimes more or less heavily infuscate dorsally ; pedicellus and fiagellum fuscous, 

 the former sometimes paler apically. Coxae, and femora except their tips narrowly, concolorous 

 with the thorax ; trochanters partly fuscous, partly testaceous ; tibiae bright testaceous, 

 sometimes more or less infuscate medially ; tarsi paler testaceous with their fifth segment 

 brown. Tegulae brown with a metallic gloss. Wings subhyaline ; venation brownish test- 

 aceous. Length 1-7 to 2-3 mm. 



Head about 1-2 times as broad as the mesoscutum, in dorsal view strongly transverse (2-4 to 

 2-5 times as broad as long ) ; temples extremely short ; ocelli in a triangle whose base is about 

 2-5 times its height, POL about i-6 times OOL. Head in front view broadly oval, 1-3 to 1-35 

 times as broad as high. Eyes separated by about 1-5 times their own length. Malar space 

 nearly half the length of an eye. Breadth of oral fossa about 2-8 times the malar space. Clypeus 



