548 M. W. R. de V. GRAHAM 



lum testaceous, somewhat brownish dorsally, the segments brownish at their bases. Pronotal 

 collar margined in the middle, the front edge sometimes strongly raised. Length 2-3 to 2-8 mm. 



One male (now designated LECTOTYPE) stands under the name patro in 

 Walker's collection ; it bears a Waterhouse label. 



Additional material : — 



England : Surrey, Mickleham Downs, $$, $$ emerged 18. iv. 1938, from Orellia 

 winthemi (Mg.) on Carduus crispus L., reared by (M. Niblett), material in the Hope 

 Dept., University Museum, Oxford. 



Habrocytus caudiger sp. n. 



$. Differs from that of albipennis (Walker) as follows : Length 4 to 4-8 mm. Fore wing 

 with marginal vein 1-65 to 1 -9 times as long as the stigmal vein ; venation fulvous, the para- 

 stigma and stigma sometimes brownish testaceous. Gaster relatively longer, 1-3 to 1-5 times 

 as long as head plus thorax, 3-4 to 4 times as long as broad, more compressed, conical, broadest 

 at about the level of the apex of the basal tergite, in albipennis usually with its broadest part 

 somewhat farther back ; last tergite 1-35 to 1-55 times as long as its basal breadth. Malar 

 space from somewhat more than half, to nearly two thirds, the length of an eye. 



o*. Resembles that of albipennis but is larger (length 3-4 to 3-5 mm.). 



Holotype $. England : Berkshire, Hinksey, emerged 2.vi.io.25, from Terellia 

 longicauda (Mg.), in flower-head of Cirsium eriophorum L. (E. G. R. Waters), in 

 Hope Department, University Museum, Oxford. 



Paratypes. Same locality and host as holotype, 1 <$, 1 $ 1-2. vi. 1925 (E. G. R. 

 Waters) ; Wytham, $$ emerged 31.iii.1953, 3. v. 1953, 4. v. 1953 from flower-heads of 

 C. eriophorum (G. C. Varley) ; Oxfordshire, Shotover, 1 $, emerged i.vi.1925 from 

 Terellia longicanda on the same host-plant (A. H. Hamm), in Hope Department, 

 University Museum, Oxford. 



Habrocytus decipiens sp. n. 



(Text-fig. 398) 



$. Differs from that of albipennis as follows : Flagellum most often distinctly testaceous 

 beneath. Size relatively less (length i-8 to 2-5 mm). Head in dorsal view with temples only 

 one quarter as long as eyes or hardly more, and converging rather more strongly Flagellum 

 (Text-fig. 398) distinctly clavate, strongly so in small specimens ; pedicellus at least very 

 slightly longer than the first funicular segment, usually obviously longer ; first funicular seg- 

 ment quadrate or hardly longer than broad, the following segments quadrate, or the sixth, 

 sometimes also the fifth, slightly transverse ; sensilla relatively less numerous, arranged in one, 

 sometimes irregular, row on each funicular segment. Fore wing with row of hairs on lower 

 surface of costal cell often complete ; marginal vein only 1 -27 to 1 -45 times as long as the stigmal 

 vein. Gaster relatively shorter, ovate-lanceolate, from nearly as long as, to slightly longer than, 

 head plus thorax, 1 -65 to 2-1 times as long as broad, not compressed and nearly or quite as broad 

 as the thorax ; last tergite at most as long as, but usually shorter than, its basal breadth. 



o*. Not definitely associated. 



Holotype $. England : Berkshire, Thatcham Reeds, near Newbury, 29.viii.1964, 

 swept from flowers of Artemisia vulgaris L. (Graham), Hope Dept., University 

 Museum, Oxford. 



