BRITISH TEPHRITITES. 83 



poisers pale yellow. (Length of body li — 2 lines: of wings 

 3^— 4i lines.) 



Common in England ; on currant bushes, hazel trees, &c. 

 in the summer. 



AciDiA. — Desvoidy. 



I Desvoidy does not include this genus with his Aciphorece, but it 

 I can hardly be separated, though it is almost without their 

 ! peculiar characters, and much resembles some of the Sapromyzites. 

 Body rather long and narrow, slightly shining ; head round ; peri- 

 stoma large, angular, not longer than broad ; epistoma scarcely 

 prominent ; mouth of moderate length ; feelers not thickened ; 

 3d joint of antenna long and cylindric, 6th joint very downy ; 

 scutellum small, shining, prominent, semicircular, hiding no part 

 of the metathorax, which is also shining; abdomen of the male 

 convex, nearly cylindric, scarcely as broad as the thorax, rather 

 narrower at the base ; abdomen of the female broader at the base, 

 narrower at the tip ; telum very short; wings long and narrow ; 

 cross nervures straight and upright. 



Sp. 1. Acid, cognata. Tawny ; wings limpid^ with tawny or 

 brown bands. (Fig. 31.) 



Trypeta cognata. Wied. Meig. Etirop. Zweiflug. Ins. Y.S\5. 



PI. XLVIII. fig. 19. 

 Acidia cognata . Desvoidy, Essai surles Myodaires, 721. 2. 



Body tawny, clothed with a few black hairs and bristles ; head 

 almost white round the eyes, pale yellow beneath, a white curved 

 spot above the base of the antennae ; mouth yellow, clothed with 

 white hairs ; antennae yellow ; metathorax with a large black 

 spot on each side ; legs pale tawny, clothed with black hairs ; 

 wings limpid, each with an irregular pale tawny mark reaching 

 from the base to the middle, where at the upper border is a square 

 dark brown spot, beyond this a narrow tawny band darker above 

 stretches across the wing, still nearer the tip is another band of 

 the same size and shape, but brown at both ends, and from it a 

 dark brown curved band runs along the upper border of the wing, 

 and ends with the costa ; nervures and poisers yellow, tips of the 

 former darker. (Length of body 2| lines ; of wings 5^ lines.) 



Rare in England ; found in the autumn on ivy ; near 

 London. 



Note. — The structure of the two following species is somewhat 

 different from that of cognata. 



