1910.-J 11 



may be considered as co-types, is the finer reticulation of tlie pronotiira and its 

 sparser punctnration in both sexes. This I fail to see in tlie British specimens ; 

 the intermediate tarsi of the S , however, agree so exactly with those of Kohl's 

 species that I feel little doubt that they are identical. I have only seen one British 

 9 that I can refer to friesei, and even that I do with doubt ; but the mesonotum 

 is more finely reticulated between the punctiTres, and the punctures are 

 cei-tainly more remote than in the ordinary ? of minutus ; still these characters 

 are not so evident as in the friesei from Egypt. 



Of this species I have males from Shuckard's Collection, and 

 recently Mr. Silverlock has taken a male at Oxshott, and another male 

 and the female mentioned above labelled " Oxshott or Woking." 

 I have taken males in Jersey, but not on this side of the water. 



Halictus arnoldi, n. sp. 



This little species is closely allied to H. rninutissimus, but may be 

 known at once in both sexes by the broader face. 



S . Face nearly as broad as long; antennal joints shorter than in miiiutissi- 

 mus ; scarcely, if at all, longer than wide ; mandibles dark, piceous, paler at 

 the base ; punctviration of the mesonotum slightly sparser than in rninutissimus ; 

 propodeum more narrowed posteriorly, and more shining on its declivous part, 

 this in rninutissimus being rather densely punctured. Abdomen much less strongly 

 punctured than in that species ; legs black, tarsi very dark piceoiis. 



? . Face broader than long ; thorax and mesonotiuu together much shorter 

 and rounder than in minutissiinus ; mesonotiun less strongly punctured ; angles 

 of pronotum not produced ; lateral longitudinal impressions much less strongly 

 marked ; wings not clouded ; propodetun much more finely sculptured, its 

 basal area scarcely rougher than the rest. In rninutissimus the area is very 

 distinct and finely rugulose. The abdomen has the basal segment sparsely 

 punctvu'ed all over, and the following segments are closely and finely punctured. 

 In minntissim^i^s the basal segment is almost without punctiu-es, except for a 

 few near the apex ; size of rninutissimus. 



Hellingly, near Eastbourne: 3 (^, 1 ? , 14.viii.08. 



This is really a very distinct species. I sent both sexes to Herr 

 J. Alfken, of Bremen, who quite agrees with me that it is midescribed. 

 I have named it in honour of Mr. George Arnold, its captor, who has 

 done excellent work with our British Aculeates. He has very kindly 

 presented the type specimens to me. 



DUFOTJREA HALICTULA, Nyl. 



A ? of this interesting addition to our fauna was discovered by 

 Mr. 0. C. Silverlock in the large sandpit on Woking Heath, a locality 

 which has been worked constantly by numerous Hymenopterists. It 

 must be exceedingly rare, as although it is a small insignificant species, 



