PTEROMALIDAE OF N.W. EUROPE 129 



broad as the first funicular segment, in profile not noticeably asymmetrical, 

 nearly twice as long as broad . . . . . . . . n 



(10) Hind margin of basal tergite of gaster (Text-fig. 100) more distinctly curved in 

 the middle. Antennal flagellum less slender, with bristles more outstanding ; 

 distal segments of funicle slightly transverse. Disc of fore wing rather densely 

 pilose ....... .flavicornis (Walker) (p. 136) 



Hind margin of basal tergite of gaster only slightly curved in the middle. 

 Antennal flagellum more slender, with bristles less outstanding ; segments 

 of funicle at least slightly longer than broad, except the sixth which is 

 subquadrate. Disc of fore wing less densely pilose cuscutae Ferriere (p. 136) 



(Males) 



Hind margin of basal tergite of gaster truncate or very slightly concave in the 



middle ............ 2 



Hind margin of basal tergite of gaster slightly to very distinctly curved back- 

 wards in the middle .......... 7 



(1) Antenna with combined length of pedicellus and flagellum more than twice the 



breadth of the head ; flagellum very slender, hardly as stout as the pedicel- 

 lus, clothed with hairs whose length is twice the breadth of the segments 

 that bear them, and which stand out at an angle of about 6o° ; funicular 

 segments very long, the first more than four times, the sixth about three 

 times, as long as broad. Antennal scape, and legs except the coxae, mainly 

 to entirely testaceous ..... ? truncata Thomson (p. 130) 



Combined length of pedicellus and flagellum at most about 1-5 times the 

 breadth of the head ; flagellum stouter, clothed with hairs which are shorter 

 than the breadth of the segments, and usually stand out less strongly, or are 

 even subadpressed ; funicular segments relatively short, at most twice as 

 long as broad. Antennal scape and legs usually darker .... 3 



(2) Antennae testaceous with the pedicellus infuscate, sometimes also the flagel- 



lum slightly so dorsally, the flagellum with subadpressed hairs ; funicular 

 segments subequal in length, each 1 -6 to 2 times as long as broad 



glabrata sp. n. (p. 133) 

 Antennal scape and pedicellus (at least mainly) black with a metallic tinge ; 



distal segments, or all the segments, sometimes relatively shorter . . 4 



(3) Antennal funicular segments quadrate, or at most some of the middle segments 



slightly longer than broad, the first segment not longer than the pedicellus ; 

 flagellum with subadpressed hairs . . . stepicola Boucek (p. 130) 



Antennal funicular segments longer than broad, or at most some of the distal 



ones quadrate, the first segment at least slightly longer than the pedicellus 5 



(4) Combined length of pedicellus and flagellum barely 1-2 times the breadth of 



the head ........ ? intersita sp. n. (p. 134) 



Combined length of pedicellus and flagellum 1-3 to 1-5 times the breadth of 



the head ............ 6 



(5) Petiole of gaster at most about three times as long as its maximum breadth. 



Body bright green to blue. Teeth of pronotal collar strong. Median carina 

 of propodeum indicated in the middle by at least a slight ridge, its basal 

 portion usually very sharp .... aculeata Walker (p. 131) 



Petiole of gaster about 3-5 times as long as broad. Body relatively darker 

 in colour. Teeth of pronotal collar weaker. Median carina of propodeum 

 absent except at extreme base .... nigricornis (Nees) (p. 132) 

 (1) Antennal flagellum, sometimes also the scape more or less, testaceous to 

 yellowish, with pale, only slightly outstanding hairs, Legs, except coxae, 

 entirely or mainly testaceous . . . flavicornis (Walker) (p. 136) 



