Ant homy id genera Hammomyia and HyJephila. 319 



similar to those in buccata. Wings with postical cross-vein very 

 sloping and sinuons. 



$. For the chief distinctions between this species and obtusa see 

 description of the female of the latter. Hind femora with usually- 

 only seven anteroventral bristles and with distinct posteroventral 

 bristly hairs towards base. Hind tibiae as in the females of all 

 species without any distinct bristles behind. 



Length 5-5-8 mm. 



H. personata appears to be the most common and widely 

 distributed species of the genus in Britain. It stood under 

 the name unilineata in Verrall's Collection and has undoubt- 

 edly often been mistaken for that species and for H. buccata. 

 Specimens have been taken at Cuckmere (Sussex), near 

 Dunsford (Devon) and Newmarket and Barton Mills 

 (Suffolk) by the late Mr. Verrall ; at Shoeburyness (Essex) 

 and Wendover (Buckingham) by Col. Yerbury ; at Seaton 

 (Devon) by the Rev. A. E. Eaton ; in and near Oxford by 

 Mr. A. H. Hamm ; and at Long Sutton (Hants). All cap- 

 tures took place in May and June. In addition Col. Yer- 

 bury found a female at Hyeres (S. of France) on March 19th, 

 1898, and there was a single male in Kowarz's Collection 

 under the name unilineata Zett. taken in Corfu. It also 

 occurs in Sweden, males having been examined from 

 Ringdahl's Collection and a single female in Zetterstedt's 

 Dipt. Scand. Collection under buccata. 



With regard to the habits of this species, Mr. Hamm 

 caught two females following Andrena labialis at Boar's 

 Hill, Brickfield, near Bagley Wood, Oxford {v. Proc. Ent. 

 Soc. Lond. 1906, p. xiii) ; four females at University Parks, 

 Oxford, following Andrena nigroaeneus ; and two females 

 at Open Brasenose Common, near Oxford, with Andrena 

 labialis — one of them captured after having entered the 

 burrow of the bee. There is also a female in the B.M. 

 from the Verrall Collection labelled " Margate, v. 05, 

 shadowing Andrena trimmerana.^' 



5. Hy. unistriata Zetterstedt, Ins. Lapp. 677 (1838); 



D. Scand. iv, 1512 (1845). 

 Syn. unilineata Schnabl and Dzied. {nee Zett.), Nova 

 Acta, xcv, PI. 5, figs. 79, 80 (1911). ? inflata Stein p.p. 

 {nee Rond.), Arch. f. Nat. Ixxxi, 161 (1916). 

 (Plate X, fig. 11.) 

 Superficially resembling H. personata, but thorax with a 



