270 [May' 



tlian tlie rest, especially in the male. I tave caught it abundantly at 

 Beaulieu, Seaford, and near Lewes. 



ACHALCTJS FLAVICOLLIS, Mg. 



I caught two males of this rare species at Three Bridges, on 

 July 28th, 1872. 



In the genus Medeierus, my collection is still in a rather unsatis- 

 factory state ; I believe I j^ossess at least a dozen species, but many of 

 them in only one or two specimens, or in only one sex. I intend, 

 therefore, to wait for more matei-ial before introducing doubtful, or 

 describing new, species ; in the meantime I can clearly add : — 



Medeteetjs flayipes, Mg. 



A south European species, extending from Spain to Asia Minor, 

 and yet, strange to say, tolerably common on posts and wooden build- 

 ings about TTpware, in company with JLT. diadema, L. It is smaller 

 than that species, with quite yellow legs and a white epistoma. Both 

 species were common, close to the house where I stopped, last July, 

 and I soon learned to distinguish them at a distance of several yards, 

 although I overlooked the first specimens oiflavipes until they were 

 killed and pinned. There is one sjDecimen correctly named in the 

 British collection in the British Museum, but two specimens with it 

 belong to the genus Psilopus. 



Xanthochloeus bicoloeellus, Zett. 



I caught one male of this species at Plashett Park, uear Lewes, 

 unfortunately in rather bad condition, so that I cannot satisfactorily 

 decide the doubt as to this species belonging to the genus Xantho- 

 chlorus. 



Psilopus ljetus, Mg. 



A male from Fawley, June 20th, 1875, is brilliant green, slightly 

 smaller and thinner than P. longulus, Fall., frons bx'illiant green, face 

 white; the middle tibite and basal joints of middle tarsi beautifully 

 fringed with rather short thin bi'istles ; the basal joint of the hind 

 tarsi equal in length with the second joint ; the alulae yellow-haired, 

 and the genitalia rather concealed. Meigen, in his seventh volume, 

 described this species from a female, and it seems never to have been 

 met with since. I caught a female some years ago ; but, as the speci- 

 men is abroad at present, I do not know the locality. 



•Lewes : Aiwil, 187(i. • 



