82 BEES OF GREAT BRITAIN. 



mediate segments have a narrow white marginal fascia; the 

 apex has a little fusco-ferruginous pubescence. B.M. 



This species is rare : it has been twice met with, once in 

 Hampshire in August, where the sexes were captured on the 

 flowers of the Wild Briony ; it has also occurred at Southern! 

 in July. From the above circumstance, and the general resem- 

 blance of the two sexes, there can be no hesitation in uniting 

 them. 



37. Andrena tridentata. 

 A. nigra, fulvo-subvillosa ; labio tridentato ; tarsis testaceis. 



Melitta tridentata, Kirly, Mon. Ap. Angl. ii. 132. 71. 

 Andrena tridentata, Smith, Zool. v. 1749. 39. 



Male. Length 4 lines. Black; the face covered with long 

 pale yellowish-white pubescence ; the mandibles forcipate ; the 

 labrum produced in the middle and concave in front ; the cly- 

 peus has on each side an obtuse tooth ; the antennae towards 

 the apex nigro-piceous beneath. Thorax clothed above with 

 rufo-fulvous pubescence ; the wings hyaline, slightly clouded at 

 their apical margins; the legs rufo-piceous, with a pale fulvous 

 pubescence ; the tarsi rufo-testaceous. Abdomen subovate, the 

 margins fringed with pale pubescence, between which the pu- 

 bescence is fulvous. 



Mr. Kirby suspects that this may be the male of A. Smithella, 

 the female of which he met with frequently in 1799, but makes 

 no further mention of the date ; the time of appearance is of 

 considerable moment in the determination of these affinities ; 

 specimens of A. Smithella, females, were taken in April 1854, and 

 Mr. Kirby says that he captured A. iridentata in August ; there- 

 fore great doubt exists of its being the male of A . Smithella. Pro- 

 bably this is a mere variety of A. denticulata, in finer condition, 

 and the absence of the minute tooth at the base of the mandibles 

 is no greater range of variation than is frequently met with. 



38. Andrena fucata. 



A. nigra, cinerascenti-pilosa ; thorace pallide rufescenti-hirto ; 

 abdominis pedumque posticorum apicibus pallide fuscis. 



Andrena fucata, Smith, Zool. v. 1743. 28. 



Andrena clypeata, Nyland. Ap. Boreal, p. 215. 12 ; Revis. Ap. 

 Boreal p. 254. 15. 



