328 



Phoridae. 



I saw it on ^V? swarming in small swarms around the leaves of Corylus 

 and resting on the leaves; it was only males which swarmed. 



Geographical distribution: — Hitherto known from Dnemark, 

 England and Holland. 



79. A. pusilla Meig. 



1830. Meig. Syst. Beschr. VI, 218, 19, p. p. {Phora). — 1864. Schin. F. A. II, 

 345 (Phora). — 1901. Beck. Abhandl. zool. bot. Gesell. Wien, I, 63, 56, Taf.IV, 

 Fig. 65 (Phora). — 1910. Kertész, Cat. Dipt. VII, 412. — 1914. Brues, Bull. 

 Wisc. Nat. Hist. Soc. XII, 128. - 1921. Schmitz, Tijdschr. v. Entom. LXIV, 8. 

 — Phora nigra Meig. 1830. 1. c. VI, 218, 18. — 1864. Sckin. 1. c. 345. — ? Phora 

 pmnila Meig. 1830. 1. c. 218, 20. — 1864. Schin. 1. c. 345. — Phora clavipes 

 Wood, 1910. Ent. Month. Mag. 2, XXI, 195,201. — ApMochaeta clavipes, 1914. 

 Brues, 1. c. XII, 115. — 1919. Schmitz, Entom. Ber. Nederl. Ent. Ver. V, 141. 



Male. Frons broader than high, black, slightly greyish, dull; 

 inner bristle of lower row slightly below the outer and much nearer 

 to it than to the upper supraantennal ; supraantennal bristles equal, 

 the upper a little nearer together than the inner bristles of middle 

 row, the lower approximate. Antennæ somewhat small, black, arista 

 short-pubescent. Palpi black, of ordinary size and armature. Thorax 



black, very slightly shining, with blackish 

 pubescence. Mesopleura with uniform bristles 

 which are few and somewhat strong. Abdomen 

 black, dull, the short hairs almost only visible 

 at the hind margins of the segments and at 

 the sides behind; at the hind margin of sixth 

 segment almost not longer. Hypopygium not 

 large, black, glossy above at the base; the 

 sides are produced somewhat downwards 

 ending in a point; there is a series of hairs at 

 the lower margin, ending at the point with a 

 longer, backwards curved hair; the ventral 

 plate is narrow, broadest at the end, yellowish, it is microscopically 

 hairy; anal tube small, black to dusky yellow, with longish hairs, 

 but the apical hairs small (fig. 100). Legs black or blackish brown, 

 front legs not or amlost not paler; front tarsi a little stoutish, hind 

 tibiæ stout and somewhat thickened outwards and hind metatarsi 

 somewhat dilated; hind femora with quite short hairs below, bristles 

 on hind tibiæ very small and numerous. Wings colourless or a little 

 whitish, axillary lobe rather large, approaching a rectangular shape. 



Fig. 100. A. pusilla <3 , 

 hypopygium X 130. 



