2042 Insects. 



the margins of the segments have a narrow white fascia, the first and 

 second frequently interrupted; beneath, the segments have a thin, pale, 

 marginal fringe. 



Male. — (Length 4 — 5 lines). Black ; the apical margin of the cly- 

 peus, and also the labrum, yellow ; the antennae not quite so long as 

 the head and thorax ; the pubescence on the face is griseous below 

 the base of the antennae, at which and above it is stained with yellow. 

 Thorax thinly clothed with pale fulvous ; the tibiae and tarsi yellow ; 

 all the tibiae have a dark stain beneath. Abdomen linear ; the first 

 four segments have laterally a narrow white fascia on their apical 

 margins, the fourth frequently entire ; beneath the apical segments are 

 depressed or concave. 



St. Fargeau considers this species to be identical with the Halictus 

 nidulans of Walckenaer, but in this I cannot agree. I feel satisfied 

 that Walckenaer was intimately acquainted with his species, and knew 

 the sexes to be correctly assimilated : the description of the male 

 will not accord in prominent particulars, and that of the female is far 

 too brief to be relied upon. The description of the Apis flavipes of 

 Panzer, and also the figure, I think apply to our species. I should 

 have adopted Panzer's name, had I not applied the same to another 

 species,— the Hylaeus flavipes of Fabricius. Whether our species be 

 the Apis rubicunda of Christius I think very doubtful, since that au- 

 thor describes his insect as having reddish yellow bands on the abdo- 

 men : his description is too brief, and would agree much better with 

 that of H. fulvocincta. 



Sp. 3. Halictus flavipes. 

 Apis Jlavipes, Linn., male. Hylaeus jlavipes ^ Fab. Apis crocipes, 

 Fourcroy. Apis tumulorum, Linn. ? Megilla subaurata, Fab., 

 female. Apis subaurala, Panzer. Halictus seladonius, Latr., St. 

 Fargeau. Melitta seladonia, Kirby. 



Female. — (Length 3 — 4 lines). Bronzed green ; the antennae be- 

 neath piceous at their apex ; the mandibles ferruginous at their tips. 

 Thorax shining, closely punctured, a scratch in the centre of the 

 dorsolum, and also a short parallel one over the tegulae ; the rae- 

 tathorax rounded, of a bright green, sometimes of a blue-green ; the 

 pubescence on the sides of the thorax and beneath is pale ochraceous ; 

 the tegulae and nervures piceous; the wings iridescent; the legs 

 nigro-piceous, their pubescence pale yellow, that on the tarsi beneath 

 of a bright golden yellow; the apical joints of the tarsi pale ferrugi- 



