British Hymenoptera. 



259 



impressions on the inner margins of the eyes filled with 

 golden velvety hairs. Thorax clothed with pale hairs 

 round the edges, and with fulvous hairs on the disk. 

 Scutellum, post-scutellum, and hasal area of metathorax 

 longitudinall}^ impressed down the centre. Abdomen 

 somewhat dull, clothed with a very short pale pubescence ; 

 apical margins of the segments pale, narrowly fringed 

 with white hairs ; apical fimbria golden brown ; beneath 

 punctured, the posterior margins of the segments pale 

 and fringed with long hairs. Legs clothed with pale 

 hairs ; posterior tibiae and all the tarsi piceous, trans- 

 lucent ; tibiae and tarsi narrower than in most of the 

 species, giving them an unusually elongate appearance. 

 Length 9 — 12 mm. 



Hah. Local. Hampstead, Bristol, Chobham Common. 



Division V. 



(10) 1. (J ; labrum tuberculated, the tubercle much 



raised and emarginate in front. J ; scopaB 

 black, dull brownish, or reddish brown. 

 (9) 2. ^ ; abdomen densely covered with pale hairs ; 

 mandibles not long and falcate. J ; disk of 

 thorax densely clothed with pale or bright 

 fulvous hairs. 



(6) 3. (^ ; apical ventral segment bilobed at the apex. 



2 ; 5th abdominal segment clothed with erect 

 black hairs. 



(5) 4. 5 with dense black scopse ; face with black 



pubescence . . . . . . . . . . nigriceps. 



(4) 5. 2 with brown scopfe ; face with pale pubescence simillivia. 



(3) 6. ^ ; apical ventral valve entire at the apex. J ; 

 5th abdominal segment with adpressed brown- 

 black hairs, or pale hairs. 



(8) 7. (^ ; larger ; abdomen less distinctly banded ; 

 apical ventral segment slightly dilated and sub- 

 truncate at the extremity. J ; 5th abdominal 

 segment with pale hairs . . . . . . tridentata. 



(7) 8. (J ; smaller ; abdomen more distinctly banded ; 



apical ventral segment not dilated, rounded at 

 the extremity. J ; 5th abdominal segment 

 with dark hairs . . . . . . . . . . futscipes. 



(2) 9. Hau-s on disk of thorax black or nearly so. ^ ; 

 mandibles long and falcate ; segments of abdo- 

 men with only pale apical bands . . . . denticulata. 



(1) 10. <y ; tubercle of labrum transverse, simple. J ; 



scopjft bright fulvous yellow. 

 (12) 11. Pubescence of the face below the antenna3 white 



in both sexes . . . . . . . . . . j'asciata. 



(11) 12. Pubescence of the face below the antennje pale 



brown in both sexes . . . . . . . . fulvicrus. 



