1 26 [June, 



female. Of tliis^ fnseet I liave not seen a stylopized example for many 

 years, and the one or two I examined were, as it happened, not much 

 affected by the parasite. 



11. A. xprcht, minutula, saundersella, etc. — I have seen many 

 stylopized examples of these obscure and minute species, but owing to 

 their small size and close relationship one to another, the}' are not very 

 favourable material for working at. It should be said, however, that 

 in no case have I seen stylopized examples which could not be referred 

 to their proper species with certainty, in spite of alterations caused by 

 the parasite. 



Of other sjDCcies I have examined only a few, or comparatively few, 

 stylopized examples, but a few notes may be added on some of these. 



12. A. pilipes F. — A few stj'lopized males have been examined; 

 the Stijlops itself has been named nassonowi hj Pierce from Nasso- 

 now's figure. Nassonow himself considered the St^Ioj^s to be melittae. 

 Whether my S. himacitlatae is different remains to be proved. I have 

 only taken stylopized A. pilq)es in the same locality as stjdopized 

 himaciilata. In one J bee from which a S Stylo2')s had escaped, the 

 long hairs of the base of the abdomen are much decreased in number, 

 and the head is extremely small. One, bearing a female Stylops, is less 

 altered. These stylopized pilipes I have taken belong to the first 

 generation. 



13. A. himaculata K. — The male example of the Stylops and the 

 females referred to Avere from the second (or summer) brood of the bee, 

 but I find that I have a note of having collected a stylopized female of 

 this bee in 1899 at Mildenhall, Suffolk. I have not examined any 

 stylopized males, and the females are none of them very much altered 

 by stylopization. One female, indeed, was collecting a heavy load of 

 pollen from bramble blossom when captured. So far as \ can judge, 

 this bee, like its close ally Uhialis, will be found, as a rule, to undergo 

 less degeneration of its scopae than trimmerana or nigroaenea from the 

 attack of the parasite. 



14. A. lahialis K. — In stylopized females, frequently either the 

 clypeus, or both this and two spots on the sides of the face adjoining it, 

 become vellow ; in males the yellow facial markin2:s are reduced in size. 

 Smith and Hamm remark that Perez's observations on the change of 

 colour of the clypeus have not been confirmed since his publication 

 of the fact, but this is not quite correct. F. Smith described the pale- 



