1918.) 71 



4. — S. Jiaminellcfy sp. n. 



Found by Mr. A. H. Hamm near Oxford, but very rarely. He has 

 sent me for inspection the $ of Andrena chrysosceles, its host, which 

 was figured in the paper by himself and Geo&ey Smith on " Stylops 

 and Stylopization " (Quart. Journ. Micr. Science, 1914, pi. 35). 

 Mr. Hamm has taken one or two other females of chrysosceles, stylo - 

 pized, but these have not the clypeus yellow, as in the one he figured. 

 At Newton Abbot, where in some seasons in one large meadow this 

 Andrena occurs literally in thousands, stylopized examples are very 

 rarely met with. In a stylopized female containing mature triungulins 

 the basal black band of the cephalothorax is nearly straight and definite, 

 but does not extend forward to the line of the spiracles, across which the 

 thorax is '9 mm. wide. A less mature one is '78 mm. wide, but other- 

 wise very similar. The wing of the <S removed and fastened down flat 

 is 2i mm. long. 



5. — S. nevinsoni, sp. n. 



This is parasitic on A. synadelpha and it would be interesting to 

 compare the cS with those from other species of the varians group, most 

 of which are found stylopized, but unfortunately I have no material of 

 male Stylops from these. The wing length (when this organ is removed 

 and flattened) is about 3 mm. The § cephalothorax is widely dark- 

 banded basally, the dark band being straightly margined anteviorly, 

 a little in front of the spiracles, and with a tendency to a median 

 suffusion extending still further forwards. The width across the 

 spiracles is "9-1 mm. Named after Mr. E. B. Nevinson, who has 

 industriously studied the British Aculeata. 



6. — S. himaculatae, sp. n. 



I have only obtained one (S of this species, and that not in good 

 condition. Andrena bimaculata var. vitrea Sm. is not uncommonly 

 found stylopized in S. Devon, but I have not yet observed stylopized 

 specimens of its first brood (var. conjiincta Sm.). Mr. Hamm has taken 

 a stylopized female (also of the second brood) at Wellington CoUeo-e, 

 Berks. 



7. — S. spencii Pickering. 



Pickering's description appears to me to give no very useful 

 character, and his figures, as described by Pierce, certainly do not at all 

 agree with the Stylops I have procured from A. tibialis (atriceps). As 

 a matter of fact, the description by Pierce from Pickering's figures of 

 the antenna applies much more nearly to S. melittae, the parasite 



