Miss Staveley on the Form of the Pecten in Bees, 155 



Andrenid.^. 

 Colletes Daviesana, S (teeth much the longest at the lower end). 

 Andrena cingulata, $ , figs. 1, 2. 



nitida, $ , figs. 3, 4 (comb reversed near the top). 



Clarkella, $ (comb reversed near the base). 



, <? (comb reversed). 



Cilissa leporina, ? (comb of four teeth). 



, <? (comb of three teeth). 



Sphecodessubquadratus, ?.l 



Halictus leucozonius, <J . L- ^ ^ 



morio, ? . I ^^™^ "^* P''^^"*- 



Dasypoda hirtipes. J 



APID^. 



Panurgus Banksianus, $ , fig. 6. Comb not marginal. ' 

 Eucera longicornis, ? (fig. 5). ^ 



Comb not 



marginal, 



commencing 



near the base 



of upper joint 



of maxilla. 



Bombus teiTCstris, ? . 

 lucorum, $ . 



^i- 



Latreilliellus, $ . 



Apathus campestris, $ . 

 Apis mellifica, ^ . 

 Euglossa cordata. 

 Nomada furva, $ *. 

 Epeolus variegatus, <? *. 

 Ccelioxys vectis, $ *. 

 Osmia rufa, ? . 

 Chelostoma florisomne, ^ 



Comb marginal. 



Comb on upper part of 

 second joint of maxilla. 



J 



Comb not present. 



There is also an appendage to most of the maxillae (and when ab- 

 sent it may possibly have been torn off in dissection), which seems 

 too delicate to assist in the mechanical work for which the combs are 

 probably used. It is a small membranous lobe, covered more or less 

 thickly with long hairs, and situated on the lower joint of the maxilla, 

 on the opposite side to that of the palpus (see figs. 1, 3, 6). 



In many of the maxillae there are several projections or small 

 tubes (as I shall for convenience call them, having little doubt of 

 their tubular construction) generally tipped by a hair, and in ap- 

 pearance strongly resembling the small tubes which exude the mate- 

 rial of the web from the spinneret of a spider. They are in various 

 situations : sometimes at the apex of the maxilla ; forming some- 

 times an irregular line nearly the whole length of the upper joint ; 

 sometimes in a cluster close above or below the maxillary palpus ; 

 sometimes in two clusters, one above and one below the palpus. I 

 would call your attention particularly to the straight tubes near the 

 apex of the maxilla of Epeolus variegatus S (fig. 7), and the flask- 

 shaped tubes near the palpus in Osmia rufa $ (fig. b)f . 



* Parasites. I have as yet found no parasitic Bee with the comb. 



f. After writing the above paragraph, it occurred to me that Dr. J. Braxton 

 Hicks, in a paper read before the Liunean Society (and printed in their Trans, 

 vol. xxiii. part 1, p. 139), had preceded me in the observation of these organs, 

 and I hesitated to send the notes for printing ; but, on examination of his paper, 

 I am inclined to think that the tubes which 1 have described in the maxillae of the 

 Bees are not necessarily of the same nature as the organs observed by him in 



