1918.] 127 



faced female of stylopized lahialis as separata Sm.. but subsequently 

 himself sunk it under the former name. vSaunders specially mentions 

 that he has eliminated species formed on stylopized examples, and 

 therefore separata Sm.- does not appear in his " Synopsis," but he must 

 have been well aware of such specimens, as they exist in many of the 

 older collections. Similarly as to the reduction of the pale markings in 

 stylopized S d, Chitty in 1902 (Ent. Mo. Mag. pp. 182-183) recorded 

 a black-faced example of A. chrysosceles. 



15. A. chrysosceles K. — A stylopized female with yellow clypeus 

 was taken by Mr. A. H. Hamm at Oxfoi'd, and one or two others 

 unaltered. I have taken the 6 with black clypeus (like that recorded 

 by Chitt}^) at Newton Abbot. 



16. A. tarsata Nyl. (analis). — Mr. Hamm has informed me that 

 the two stylopized females he possesses were from a much affected colony 

 discovered by Arnold in the New Forest. Tliese females have a normal 

 black clypeus, and there are no stylopized examples in Arnold's col- 

 lection. No doubt males with black, and females with white, clypeus 

 will be found. The hind tibiae are considerably suffused with black 

 (cf. A. tibialis and wilkella). 



17. A. coitana K. — A parasitized $ has a large yellow spot on the 

 clypeus, and I have seen no other example of this species stylopized. 



The commonest position for the protrusion of the puparium of 

 Stylops is through the intersegmental membrane that divides the fourth 

 and fifth abdominal segments, more rarely between the one preceding or 

 following this. In a few cases it is quite abnormal. Thus in the 

 A. coitana mentioned above, the parasite appears to have escaped 

 between the 1st and 2nd segments. In one example of trimmerana 

 I noticed that the head of the $ puparium was so lateral in position that 

 it was covered by the ventral sclerite, but such cases must be very rare. 



Many collectors have witnessed the flight of the c? Stylops and on 

 special occasions they have been seen in some numbers together, as by 

 Thwaites, J. C. Dale, Champion, and Hamm. Often they fly at some 

 height from the ground, but in Germany Friese took males flying about 

 the burrows of A. ovina. The only reason why this sex of Stylops 

 cannot easily be obtained in plenty is because, as a rule, it emerges from 

 the host very soon after the bee issues from its burrow into the sunlight, 

 so that most stylopized bees, that do not contain female parasites, are 

 found, when caught, to have only the lid-less, empty puparium of the d 



