350 M. W. R. de V. GRAHAM 



2.viii.i956, at Crowle, North Lincolnshire (D. Lomas) ; and others reared in southern 

 Sweden in 1936, from Contarinia tritici (Kirby) by E. Johansson. The latter 

 evidently had a mixed series included in his record (1936) of chalybea, only part of 

 which represented the true chalybea ; he stated that in chalybea the antennae were 

 similar in both sexes, i.e., that the scape in the male was not swollen. This error 

 can be traced back to Thomson (1876 : 190) who stated under chalybea " scapo <$ 

 haud dilatato ", he had associated the male of some other species with the female of 

 chalybea. I have also examined a male of chalybea reared in England (Lincolnshire, 

 Fulstow, 1956) from Dasyneura viciae (Kieffer) on Vicia tetrasperma (L.) Schreb. 

 (C. J. Guile). Imagines appear in the field June-August. Kutter (1934) stated 

 that there are two generations per annum, although the second may be incomplete 

 because some larvae may overwinter. 



Pirene bouceki sp. n. 



(Text-figs. 275-277) 



$. Shiny, black, with a faint bronze tinge in places. Mandibles, knees, tips of tibiae very 

 narrowly, and tarsi proximally, brownish testaceous. Wings hyaline, or faintly brownish in 

 the middle ; venation fuscous. Length 1-3 to 1-4 mm. 



Head much compressed antero-posteriorly, hence in dorsal view appearing very short and 

 strongly transverse, with the temples extremely short ; in frontal view slightly broader than 

 high, unless abnormally collapsed after death. Edge of occiput, just behind the ocelli, rather 

 sharp, probably not a post-mortem phenomenon. Eyes about 1 -7 times as long as broad, some- 

 times relatively longer owing to shrinkage of head, separated by about 1-25 times their length, 

 rather sparsely pilose, the length of the hairs fully 1 -5 times the diameter of the ocular facets. 

 Ocelli in an obtuse-angled triangle, but this is not easy to see because of the collapse of the frons ; 

 POL about equal to OOL. Malar space slightly less than half the length of an eye. Antennae 

 (Text-fig. 276) with scape shorter than an eye, about six times as long as broad ; pedicellus in 

 profile 1 -7 to 1 -8 times as long as broad, about as long as flagellar segments one to three together ; 

 flagellum fusiform, with its first and second segments anelliform, transverse, about equal in 

 length, but the second segment slightly broader than the first ; segments three to five subequal 

 in length and breadth, slightly transverse, provided with sensilla ; clava about twice as long as 

 broad, slightly longer than the three preceding flagellar segments together ; flagellum clothed 

 with rather short hairs. 



Thorax depressed, the surfaces of the mesoscutum, scutellum, dorsellum, and propodeum all 

 lying in virtually the same plane. Pronotum narrowing strongly forwards, somewhat shorter 

 than the mesoscutum. Mesoscutum fully twice as broad as long, nearly flat, with delicate 

 engraved (alutaceous) sculpture ; its mid lobe with six suberect bristles, four in an anterior 

 transverse row and two posteriorly, occasionally a seventh bristle anteriorly. Scutellum about 

 as broad as long, nearly flat, shiny, nearly smooth ; frenal groove weak or subobsolete ; six 

 bristles present, two very near the front margin of the scutellum, two posteriorly, and one on 

 each axillula. Dorsellum long, semicircular, smooth. Propodeum nearly horizontal, more than 

 half as long as the scutellum, smooth, without a median carina ; spiracles circular, close to the 

 metanotum ; callus with one to three bristles. Legs rather short and fairly stout ; hind tibia 

 without a pecten. Fore wing slightly more than twice as long as broad ; lower surface of 

 costal cell with scattered hairs in the distal half, upper surface with a row of eight to ten hairs in 

 the distal third ; basal cell, on upper surface of wing, pilose in its distal third, on the lower 

 surface of the wing with some hairs below the submarginal vein ; speculum on upper surface 

 narrow but extending below the marginal vein for nearly half the length of the latter, on lower 



