344 M. W. R. de V. GRAHAM 



associated (I believe correctly) with the female of graminea a male which differs from 

 that of microcerus. 



The hind tibial pecten in the male of microcera resembles that of male penetrans. 



Ireland. 



Biology. Unknown. Imagines June-July. 



Pirene conjungens sp. n. 



(Text-figs. 272, 279) 



o*. Black, with weak metallic reflections, mainly bluish but some bronze, on the body, 

 antennal scape, coxae, femora, and tibiae. Mandibles partly reddish. Knees hardly paler than 

 the rest of the legs ; tarsi fuscous, or the mid and hind ones obscurely testaceous proximally. 

 Wings subhyaline, venation fuscous ; tegulae dark. Length 1-2 to 1-75 mm. 



Head in front view slightly broader than high ; eyes separated by a distance about equal to 

 their own length, 1-4 to 1-45 times as long as broad, their facets of uniform size ; posterior 

 ocelli separated by about their own major diameter from the eyes ; malar space about half the 

 length of an eye. Antenna (Text-fig. 279) with scape relatively slender, about 4-5 times as 

 long as broad ; pedicellus distinctly less than twice as long as broad ; flagellar segments one 

 to three, especially one and two, very short and strongly transverse, anelliform, without sensilla ; 

 four moderately large, with sensilla, about 1 -5 times as broad as long ; five similar to four but 

 slightly larger ; clava somewhat longer than pedicellus plus funicle. 



Thorax in profile fairly strongly arched dorsally, the scutellum appearing convex. Meso- 

 scutum and scutellum with very delicate engraved sculpture. Fore wing slightly more than 

 twice as long as broad ; basal cell, on upper surface of wing, with only one to two hairs besides 

 those on the basal vein ; marginal vein 4 to 4-7 times as long as the stigmal vein ; stigma 

 moderate-sized, tending to have a subtriangular shape ; upper surface of wing without a bare 

 strip extending distad from the stigma. Legs rather slender ; hind tibial pecten similar to that 

 of $ graminea (cf. Text-fig. 283), not extending into the basal quarter of the tibia, its hairs 

 moderately regularly disposed. 



Gaster moderately to fairly strongly compressed, narrower than the thorax. 



$. Differs from the male as follows : 



Length about 1-25 mm. Antennal scape rather more slender, about five times as long as 

 broad. Gaster about as long as, but narrower than, the thorax, somewhat depressed dorsally 

 but strongly keeled ventrally ; ovipositor sheaths exserted to a length about equal to the first 

 segment of the hind tarsus ; hypopygium extending about three quarters of the distance from 

 the base of the gaster to the tips of the ovipositor sheaths. 



The <$ of conjungens differs from those of all the other species of the genus, except 

 penetrans and decipiens sp. n., in having the fourth flagellar segment large and pro- 

 vided with sensilla. From these two species, which otherwise it most resembles, it 

 differs in its relatively small eyes having facets of uniform size, broader frontovertex 

 and longer genae. 



The $ of conjungens is very close to those of penetrans and decipiens sp. n., 

 differing only in the small characters given in the key (q.v.). 



Holotype <$. England : Gloucestershire, Hallen Wood, near Bristol, 25.x. 1928 

 (B. N. Blood), in Hope Department, University Museum, Oxford. 



Paratypes. England : Cumberland, Skirwith, 1 <$, 31.vii.1953 (H. Britten) ; 

 Oxfordshire, Otmoor, 1 <j>» 27.viii.1955, 1 g, 15.ix.1956 (Graham) ; Wiltshire, near 



