THE ENTOMOLOGIST. 255 



but the first and second are usually more or less abraded in 

 the middle through forming their burrows in the ground. 



9, Halictus zonulus. 



Halictus zonulus, Smith, Brit. Bees, p. 26, male, female ; 

 Nyland. Revis. Apum Boreal. 241. 



Hylaeus zonulus, Schenck, Bees Nassau, p. 266. 



The preceding species is very frequently mistaken for this, 

 particularly the large examples ; but the following particu- 

 lars separate the females : — • H. zonulus is usually a larger 

 species ; small examples, however, would equal large ones of 

 the preceding ; they may be distinguished by the punc- 

 tuation of the abdomen ; that of H. zonulus is more finely 

 punctured, and the basal segment is ver}'^ delicately and 

 sparingly punctured, whilst that segment in H. leucozonius 

 is closely and much more strongly punctured. The males 

 are readily known by those of H. zonulus having the legs 

 entirely black, whilst the other species has the first joint of 

 the posterior tarsi white ; in other respects they closely 

 resemble each other, but the clypeus is not so much pro- 

 duced as in H. leucozonius, and has its anterior margin very 

 rarely more or less white ; usually it is entirely black. 



I have taken this bee at Plumstead Common, at Wey- 

 bridge, and in Cornwall near Penzance, and have received it 

 from Bristol and Scotland : Dr. Nylander says it is found 

 both in Sweden and Denmark. 



10. Halictus sexnotatus. 

 Melitta sexnotata, Kirby, Mon. Ap. Anyl. ii. 82, male, 



female. 

 Halictus sexnotatus, Walcken. Mem. Halict. p. 72 ; St. 

 Farg. Hym. ii. 273; Smith, Brit. Bees, p. 28; Ny- 

 land. Revis. Apum Boreal, p. 239. 

 Hylaeus sexnotatus, Schenck, Bees Nassau, p. 265. 

 Halictus sexnotatus is certainly a very local species in 

 this country : I have only three times taken it — twice at 

 Weybridge, the female in June and both sexes in September. 

 1 have seen specimens taken at Portsmouth. 



Distinguished from all the other British species by its 

 coal-black colour, and the six snow-white spots on the abdo- 

 men, placed three on each side on the basal margins of the 

 second, third and fourth segments. 



