746 Insects. 



with bright fulvous hair ; the claws ferruginous. Abdomen obsoletely 

 punctate, clothed with rufous hair, beneath densely clothed with hair 

 of the same colour. 



Var. — The horns on the face not recurved, and without the tooth 

 at the apex. 



Male. — Length 4 — b\ lines. Black, finely and closely punctured. 

 The face clothed with long white hairs, as well as the cheeks, the pu- 

 bescence slightly stained with ochraceous ; the antennas as long as 

 the head and thorax. The thorax above clothed with ochraceous pu- 

 bescence, paler at the sides and beneath. All the femora are fringed 

 with long white hair ; the tibiae have a thin fulvous pubescence, and 

 the tarsi beneath are clothed with bright ferruginous hair. The ab- 

 domen above clothed with bright fulvous hair. 



This is doubtless the most abundant species of the genus, and is 

 generally distributed. The difference in the size of individuals of 

 both sexes is remarkable. The colour of the species is very liable to 

 fade, giving them the appearance of distinct species, but a little expe- 

 rience soon detects their identity. The horns on the face of the fe- 

 male vary considerably in form, but I consider them all to be varieties 

 of the same species. 



Sp. 9. OSMIA BICOLOR. 



Apis bicolor, Schrank, Kirby. Apis fusca, Panzer. 



Female* — Length 4| —5 lines. Black. Head not quite so wide 

 as the thorax ; the face clothed with black hair, thinly so on the ver- 

 tex. The thorax clothed with black hair, as well as all the femora 

 and tibiae. The intermediate and posterior tibiae above have ferrugi- 

 nous hair at their apex ; all the tarsi ferruginous. The abdomen has 

 some black hair at the base of the first segment, the rest clothed with 

 ferruginous hair, as well as the under side of the abdomen. 



Male. — Length 4j lines. Fusco-aeneous. Head closely punctured, 

 the face clothed with bright pale fulvous hair ; the cheeks have a pal- 

 ish fulvous pubescence, which is also thinly scattered on the vertex. 

 Thorax closely punctured, and also clothed with palish fulvous hair, 

 rather darkest on the vertex. The legs have a similar pubescence ; 

 the tarsi bright fulvous beneath ; the claws ferruginous. The abdo- 

 men is obscurely punctate, and oblong ovate ; all the segments have 

 a marginal fringe of rather pale fulvous hair, the margin of the sixth 

 segment is entire, the seventh bidentate. 



The pubescence of the male of this species soon fades to cinereous, 

 and specimens frequently occur in which the hair is almost all rubbed 



