1889.] 295 



In this country the species most frequently attacked are, I think 

 without doubt, Andrena atriceps and Afzeliella, after them Trimmerana 

 and nigroaenea, and then labialis ; the other species are rarely attacked, 

 although the presence of the parasite has been noticed in twenty of 

 our British species. In many cases, although the Andrena is clearly 

 " Stylopized," the actual Stylops is not to be seen : either it may have 

 emerged (if a <£) before the capture of the bee ; or it may, as Prof. 

 Perez has observed, be entirely inside the abdomen, and so hidden ; or, 

 as he suggests in some cases, it may have been in the larva of the 

 Andrena, and its action influenced it in that stage, and escaped in the 

 change from nymph to imago. 



There are so many curious and interesting questions unsolved 

 connected with Stylopization, that a wide field is still open for 

 research. 



If any one possesses any Stylopized specimens which are of no 

 value to him, I should be very glad to receive them, and to give other 

 Symenoptera, Hemiptera, or CoJeoptera in exchange. 



St. Ann's, Mount Hermon, Woking : 

 May 9th, 1889. 



NOTES ON ME. EDWAEDS' PAPEE ON SCOLOPOSTETRUS. 

 BY EDWARD SAUNDEKS, F.L.8. 



As Mr. Edwards and I have agreed to differ as to the number of 

 species in this genus, I will briefly state here my reasons for not 

 adhering to his views. 



In the first place, I cannot at all agree with him as to the value 

 he attaches to the coloration of the antennae ; in fact, I distrust 

 colour altogether, in such organs as the antenna?, as a valid character 

 for specific distinction. I have the further reason for not admitting 

 colour in the species of this genus, that I fail to appreciate the constancy 

 of the character ; it seems to me that it is distinctly variable : for 

 instance, I have specimens of affinis, as Mr. Edwards admits, with 

 the antennae entirely yellow-brown, why he should attribute this to 

 immaturity any more than any other case of variation where pale 

 colour is more prevalent than in the type, I do not know ; for myself, 

 I regard most pale colour as due to fixed immaturity. I have also 

 specimens with the whole of the 2nd joint, and the base of the 3rd, 

 pale ; I have specimens with the apex of the 2nd joint distinctly 

 clouded ; I have specimens with the apex of the 2nd joint black, 



