102 BEES OF GREAT BRITAIN. 



shining, closely and more strongly punctured than in the fe- 

 male ; the margins of the segments depressed, the segments 

 having a marginal fringe of pale pubescence, sometimes white ; 

 the apex covered with white pubescence. 



This is a very abundant species in all parts of the country : it 

 appears in April. And here may be recorded an observation 

 made during each succeeding autumn for several years past : 

 This species partially reappears in the month of August, when 

 fine fresh males may be captured, and in a few days afterwards 

 the females; this reappearance however is only partial. In 

 very fine long-continued hot weather in autumn, Anthophora 

 acervorum, Melecta armata, and Nomada Marshamella have 

 been taken, all being early spring insects : such occurrences are 

 however very rare, and no one has previously recorded such 

 appearances. 



63. Andrena convexiuscula. 



A. nigra, griseo-subpubescens ; abdomine ovato, convexo, seg- 

 mentorum marginibus pallidis ; tibiis plantisque posticis rufis. 



Melitta convexiuscula, Kirby, Mon. Ap. Angl. ii. 166. 106 $ . 

 Andrena convexiuscula, Smith, Zool. v. 1927. 66^ $ . 



Nyland. Revis. Ap. Boreal, p. 257. 25. 

 Andrena xanthura, Nyland. Ap. Boreal. Supp. p. 100. 



Female. Length 5 lines. Black ; the face covered with short 

 pale fulvous pubescence, the flagellum slightly testaceous near 

 the apex. Thorax very closely punctured and thinly clothed 

 above with fulvous pubescence, on the metathorax and sides 

 it is paler ; the tegulae piceous, the wings subhyaline, faintly 

 obscured towards their apical margins, the nervures rufo-testa- 

 ceous ; the intermediate and posterior tarsi, the apical joints of 

 the anterior pair and the posterior tibiae pale rufous, the latter 

 having a fuscous stain beneath ; the floccus white, the scopa of 

 a golden-yellow, having in certain lights a glittering silvery 

 brightness. Abdomen ovate, convex, and shining, very deli- 

 cately and finely punctured, the punctures faintly impressed ; 

 the three intermediate segments have on their apical margins a 

 narrow fringe of pale yellow pubescence ; the two apical seg- 

 ments have a scattered short rufous pilosity, the apical fimbria 

 is pale fulvous. B.M. 



Male. The face clothed with griseous pubescence, the clypeus 

 strongly punctured, the antennae nearly as long as the thorax, 



