52 ANDRENIDiE. 



common at Weybridge and on all the open commons in Hampshire, 

 occasionally forming large colonies. It is the M. pubescetis of Kirby, 

 who took it in Suffolk, and considered it a rare species. 



33. Andrena tridentata. 



A. nigra, cinerascenti villosa, thorace pallide fulvo, abdomine 

 segmentis margine fasciis albidis, antennis subtus tarsisque rufis. 

 Mas fnlvo hirsutus, labio tridentato. 



Andrena tridentata, Smith, Zuol. v. 1749 (bidentata misp int) ; Bees 



Great Brit. 82 S 2 • 

 Melitta tridentata, Kirby, Mon. Apurn Arigl. ii. 132 $ . 

 Melitta rufitarsis, Kirby, lib. cit. 135 $ . 

 Andrena rufitarsis, Smith, Zool. v. 1750 5 . 



Female. Length 4|-5 lines. — Black ; the clypeus strongly punc- 

 tured ; the face clothed with yellowish white pubescence ; that on 

 the vertex is more fulvous; the flagellant beyond the third joint 

 bright fulvous. Thorax clothed above with pale fulvous pu- 

 bescence ; that on the sides, beneath, and on the metathorax yel- 

 lowish white ; that on the legs is of the same colour ; but on the 

 first joint of the tarsi beneath it is ferruginous ; the floccus nearly 

 white ; the scopa slightly fulvous ; all the tarsi, except their basal 

 joints, pale rufo-testaceous. Abdomen subovate, the segments 

 thickly fringed with yellowish white pubescence, the apex slightly 

 fulvous. B.M. 



Male. Length 3|-4 lines. — Black ; the pubescence on the head 

 fulvous, palest on the clypeus and cheeks ; the anterior margin of 

 the clypeus with three teeth, the central one large and blunt; the 

 antennae with the flagellum, except the basal joint, fulvous beneath. 

 Thorax clothed above with dense rufo-fulvous pubescence ; the 

 legs as in the female. Abdomen subovate ; the margins of the 

 segments fringed with pale fulvous pubescence. 



This species appears in July, and is usually found on the flowers 

 of the ragwort : it is local and scarce, but has been taken at Melton, 

 near Woodbridge, Suffolk, at Cromer, Norfolk, at Christchurch, 

 Hants, and also at Norwich. The pubescence is very subject to 

 fade. 



34. Andrena angustior. 



A. nigra, subvillosa, thorace fulvo-pubescente, pedibus quatuor 

 anticis nigro-piceis, tibiis tarsisque posticis ferrugiueis. 



Andrena angustior, Smith, Zool. v. 1745; Bees Great Brit. 80. 

 Nyland. Noti*. ur S&lUk.pro Faun, et Flo. Fenn. ii. 254. 

 Melitta angustior, Kirby, Mon. Apam Any I. ii. 122 $. 

 Andrena lacinia, Smith, Zool. v. 1751 § • 



Female. Length 4^-5 lines. — Black ; the face clothed with obscuie 

 fusco-ferruginous pubescence, the flagellum nigro-piccous. Thorax, 



