168 Mr. W. B. Pickering on the Strepsiptera. 



With regard to the genera of bees attacked by this order of in- 

 sects in this country, I am inclined to believe that the parasite is 

 confined to that of Andrena, six species of which I know to be 

 infested with it, viz. Andrena nigro-cenea, A. tibialis, A. rufitarsis, 

 A. labialis, A.fulvicrus, A. Collinsonana} . I have no doubt that 

 there are other species of this genus attacked which I have not 

 been able to ascertain. 



My Sty lops is specifically distinguished by its comparatively 

 large size ; dark wings, marked with strong black nervures ; basal 

 joint of antennae produced obliquely internally to a considerable 

 distance beyond the insertion of the second joint ; by the shape of 

 the wings, which are produced at the external anterior angle to a 

 point, and are very broad and rounded behind ; and by the pitchy 

 red anus. 



As one of the species of the genus Stylops has been described 

 with the name of our esteemed Honorary President, I have thought 

 that this very distinct species could not be more worthily distin- 

 guished than by the name of his talented coadjutor, and have ac- 

 cordingly named it Stylops Spencii. (Plate XVII. fig. 1.) 



Before concluding I must, as an act of justice to our Secretary, re- 

 cord my grateful thanks for his kindness and the valuable hints he 

 has given me in the preparation of this communication. 



P.S. Since the above observations were laid before the Society, I 

 have had many opportunities of inspecting the cabinets of Mr. Kirby 

 and other members of the Society ; and I have therein found, as I 

 had suspected, many other species of Andrena stylopized, in addition 

 to those already enumerated, viz., Andrena Mouffetella, A. varians, 

 A.picicornis, A.parvula, A. xanthura,A. convexiuscula, A. Afzeliella, 

 a new species (No. 120) ; all which are in the collection of British 

 Bees presented to the Society by Mr. Kirby ; a new species of An- 

 drena, nedir A. labialis, in the cabinet of Mr. Shuckard ; Andrena 

 Gwynnana in the collections of Mr. Westwood and myself, many spe- 

 cimens having been taken this year affected with these parasites; and 

 two or three new species of Andrena in my own cabinet. 



