1922.] 25 



subsequently came to the conclusion that it was only a variety or fresh 

 specimen of tumulorum, so that fasciafus Nyl. does not occur in our 

 list, nor have I ever seen a British specimen. 



H. tumulorum is so generally distributed in England and so very 

 abundant that it may readily serve to conceal the presence of closely allied 

 species of similar appearance, and my own series is a very short one. I 

 think, however, that Jlavipes is certain to prove much rarer, or at least 

 more local, even if it is shown to be generally distributed like fuunilornm. 

 The iew Jlavipes in my collection are casually caught, single examples, 

 both sexes from the New Forest and the $ from Devonshire,* while, as 

 1 have mentioned above, it was taken by Smith at Deal. Very probably 

 it exists in many collections mixed with tumulorum. It is said to be 

 most partial to sandy places. In Devonshire I am sure it is much 

 scarcer than tumulorum, if it exists there. 



Including fasciatus Nyl., not at present known as British, but 

 possibly existing in some collection, or hereafter to be discovered, the 

 allied species may be distinguished by the help of the following table: — 



6 6- 



1 (2) Antennae shorter, not reaching behind the postscutellum ; 6th ventral 



segment at most a little depressed, not conspicuously foveate in the 

 middle at the base subauratus llossi {yramineus Sm.). 



2 ^1) Antennae very long, reaching behind the brow of the propodeum ; 6th 



ventral segment foveated at the base. 



3 (4) Occipital margin of tlie vertex of head sharp, the vertex very strongly 



raised behind the ocelli. 



(Tomentose bands of abdominal segments 2-4 dense, wide, and 

 clearly defined, as also one at the base of the 2nd segment). 

 .... fasciatus Nyl. 



4 (3) Vertex of head ordinary, rounded off into the occiput. 



5 (6) Trochanters of middle pair of legs pale beneath, yellow or reddisli ; apical 



margin of the foliaceous inner process of the laciuia of the genital 

 armature broadly rounded or nearly straight, the smaller outer process 

 in lateral aspect very wide, fan-shaped, and at the apex as broad as 

 long jiavipes F. 



6 (5) Trochanters of middle legs black ; foliaceous inner process of lacinia 



distinctly emarginate at the apex, the outer process, in lateral view, 

 small, subtriangular or subclavate. 



.... iumidorum L. 



??• 

 1 (2) Vertex of head very strongly raised behind the ocelH, so that a sharpish 

 edge is formed with the occipital region. 



(2nd, 3rd, and 4th abdominal segments each with a wide, complete, 

 tomentose band, which fills the apical impression of each segment). 

 .... fasciatus Nyl. 



* The specimen being abraded, I am not quite aure of its identity mth Jlavipes. 



