British Hymenoptera. 251 



punctured and clothed with long black hairs, and also 

 having a slight central depression noticeable only in 

 certain positions. Legs clothed with black hairs ; 

 posterior femora beneath, and scopse with bright fulvous 

 hairs ; tarsi with brown-black hairs. Length 9 — 11 mm. 



Hah. A common species in spring, and generally 

 distributed. 



The only species with which it is likely to be con- 

 founded is the following, as the black-haired face and 

 simple mandibles of the 3^ , and the fulvous scopse of the 

 ? distinguish it from the other small species of this 

 group. 



18. Andrena hicolor, Fab. 



Fab., Syst. Ent., p. 376; Smith, Cat. Brit. Hym., 

 2nd ed., p. 41. 



Differs only from Gwynana in the following points : — 



The (? has the abdomen more strongly punctured and 

 rather less hairy, and the apical ventral valve pale and 

 more truncate, sometimes emarginate, at the apex ; the 

 pubescence paler. 



The ? is rather smaller, with the apical fimbria pale 

 brown, the abdomen rather more punctured, and the 

 pubescence beneath pale, not black. .Length 9 — 10 mm. 



Hah. This species occurs in July and August. I have 

 taken it at Hastings, Chobham, Southwold, and Little- 

 hampton. F. Smith says that it frequents the flowers 

 of the mallow. I fancy that it is only the second brood 

 of Gwynana, but the <? certainly is distinct by its much 

 stronger puncturation. 



19. Andrena angustior, Kirby. 



Kirby, Mon. Ap. Angl. ii., p. 122 ; Smith, Cat. Brit. 

 Hym., 2nd ed., p. 52. 



? . Very like hicolor in many respects, but differing in 

 the slightly longer, clear testaceous posterior tibiae ; the 

 face clothed with pale ochreous hairs ; thorax with 

 fulvous hairs ; abdomen finely rugulose, the segments 

 widely impressed and pale at the apex ; dorsal apical 

 valve smooth, its centre raised, but not triangularly; 

 apical fimbria brown ; scopse golden. 



I do not know the $ , and F, Smith's description does 

 not give any characters to distinguish it from its allies. 



Hah, Hampstead, Norwich, &c. ; appears in May. 



