2GS tMay. 



primo villorum flavidoi-um, penicillo utrinque ornato. Anus albus, 

 extreraitate nigro-villosus baud inflexus," cannot possibly a^pplj ^o 

 quadricolor, whicb has the abdomen sub-globose and its extreme apex 

 fulvous-red. P. Smitb seems to have realized this, saying, in his 1st 

 edition of the Catalogue of the Bees of Gi'eat Britain, under Apafhus 

 BnrhiifeJIus, " I suspect a difficulty has arisen in the discrimination of 

 this species, in consequence of Kirby using the terms, ' abdomen sub- 

 triangular ' a]]d ' anus albus ;' the latter is fulvous, which in worn 

 examples becomes white. I have used the term sub-globose in de- 

 scribing tbe abdomen of the ^ , and although strictly it is sub-triangular, 

 still, in contradistinction to the male of campestris, it is sub-globose, 

 and will serve as a distinction between them." 



Now, in Kirby's collection there are two males, one which agrees 

 in every particular with Kirby's description, having the abdomen 

 shaped as in campestris, and which is certainly referable to the Barhut- 

 ellus of Schenck and Schmiedeknecht ; the other a specimen, I believe 

 of quadricolor, but with the extreme apex of the abdomen wanting : 

 under these circumstances, I can see no excuse for not accepting the 

 specimen, which alone suits the description, as the type, and I have 

 therefore followed the nomenclature adopted by Schenck and Schmiede- 

 knecht. The five species may be easily distinguished thus : 



(2) 1. Fourtli and following segments of the abdomen red in both sexes ..rupestris. 

 (1) 2. Fourth and following segments either wliite or yellow, or of various colours, 



but not all red. 



(4) 3. J with the abdomen sub-globose, the extreme apex fulvous, ? with the ex- 



treme apex of the abdomen beneath armed with a pointed process... 



quadricolor. 



(3) 4. (? with the extreme apex of the abdomen black, ? with the apex simple. 



(6) 5. Both sexes with the posterior metatarsi almost as wide as the tibia?, and gene- 



rally with a line of yellow pubescence dividing the black of the base of the 

 abdomen from the white of the apex. $ with the sagittae of the genitalia 

 not toothed beneath . res-fa/i 



(5) 6. Posterior metatarsi much narrower than tibise, no yellow line of pubescence 



between the black and white. <? , sagittae toothed beneath. 

 (8) 7. Apical segments of <J black or yellow, not white, 6th segment beneath 

 simple, genitalia with the squamse widely triangular, $ with the apex of' 

 the abdomen yellow at the sides, 6th segment shining at the base .. 



campe/iiris. 



(7) 8. Apical segments of the g white, 6th segment beneath with a slight callosity 



on each side, genitalia with the squamae narrowly triangular, $ with the 

 apex white, the 6th segment rugosely punctured Barbutellus. 



The species now called BnrhuteUiis is apparently common, only it 

 has been overlooked. Sir Sidney Saunders has had the males separated 

 for some time in his collection by the genitalia. 



Ilolmesdale, Upper Tooting : 



16lh April, 1883. 



