6. HALICTT7S. 89 



griseous pubescence. Thorax closely punctured, the pubescence 

 griseous ; wings hyaline and iridescent ; faintly clouded at their 

 apical margins, the nervures testaceous, the tegulae black ; the 

 pubescence on the legs pale yellowish white, that on inside of the 

 basal joint of the posterior tarsi fulvous ; the metathorax subro- 

 tundate. Abdomen oblong- ovate, and, except at the extreme 

 base, covered with a short griseous pile ; the apical margins of the 

 segments with fasciae of faintly yellowish- white decumbent pubes- 

 cence, that on the basal segment usually obliterated. B.M. 



In the ' Bees of Great Britain ' I have considered this species 

 a variety of II. cylindricus, not having any recent specimens for 

 examination and Kirby's type being in a bad state of innervation. 

 Since that time I have taken the female at Cromer, and find the 

 species to be quite distinct from H. cylindricus : it differs from that 

 species in having hoary pubescence, faintly yellowish in very fine 

 examples, the tegulae of the wings being black, the metathorax less 

 coarsely sculptured at the base, and not having a sharp ridge at the 

 margin of the truncation ; and the legs are black, the abdomen 

 being perfectly ovate and the margins of the segments not rufo-tes- 

 taceous. Prof. Schenck has sent a male he believes to belong to 

 the species ; it is covered with pubescence like that on the female, 

 has the apex of the clypeus, the labrum, and mandibles yellowish 

 white ; all the tibiae and tarsi are of the same colour, the tibiae with 

 a dark stain behind, the antennae bright fulvous beneath, the 

 tegulae pale testaceous as well as the nervures of the wings, the 

 latter hyaline and iridescent. 



13. Halictus albipes. 



H. ater, glabriusculus ; abdomine nitidissimo, obovato, segmentis basi 

 albis. Mas abdominis segmentis intermediis rufis, punctisque 

 lateralibus nigris, mandibulis labro clypeique apice pallide luteis. 



Halictus albipes, Smith, Zool. vi. 2167 ; Bees Great Brit. 32. 

 Hylams albipes, Fabr. Eat. Syst. ii. 306? 



Schenck, ]\ T ass. Bien. 267. 

 Melitta albipes, Kirby, Mon. Apum Angl. ii. 71 <$ . 

 Melitta obovata, Kirby, Mon. Apum Angl. ii. 75 § . 

 Halictus obovatus, Nyland. Not. ur Scillsk. pro Faun. etFl. Fenn. ii.244. 



Thorns. Opusc. Ent. 309; JHym. Scand. ii. 141. 



Female. Length 4 lines. — Black; the face thinly clothed with short 

 griseous pubescence, the flagellum piceous beneath. Thorax very 

 thinly clothed with very pale ochraceous pubescence on the disk, 

 on the sides and beneath it is griseous ; the tegulae piceous ; the 

 wings fulvo-hyaline, the nervures testaceous ; the metathorax trun- 

 cate posteriorly, the basal portion not enclosed, but rugose- striate ; 

 beyond, slightly roughened ; the tibiae and tarsi have a pale fulvous 

 pubescence, on the latter beneath it is bright fulvous ; the apical 

 joints of the tarsi ferruginous. Abdomen ovate, very smooth and 

 shining at the base and in the middle of the segments, the sides 



