330 Phoridae. 



Remarks: Schmitz has (1. c. 1921) drawn attention to the faet 

 that Becker's pusilla is no doubt = clavipes Wood, and this is evidently 

 correct; as Becker thus has fixed the name pusilla for a species in- 

 cluded in Meigen's collective species, Schmitz declares that the name 

 pusilla must now be used for the species hitherto known as clavipes 

 Wood, and in this I quite follow Schmitz. 



80. A. involuta Wood. 



1910. Wood., Ent. Month. Mag. 2, XXI, 153, 200 (PJiora). — 1914. 

 Brues, Bull. Wisc. Nat. Hist. Soc. XII, 122. — 1919. Schmitz, Entom. Ber. 

 Nederl. Ent. Ver. V, 141. 



Male. Frons somewhat broader than high, black, slightly shining; 

 inner bristle of lower row a little below the outer and about at the same 

 distance from it as from the upper siipraantennal; supraantennal 

 bristles about equal, the lower a little weaker than the upper; the 

 upper supraantennals a little nearer together than the inner bristles 

 of middle row, the lower more approximate. Antennæ of ordinary size, 

 black or brownish black, arista short-pubescent. Palpi yellow, of 

 ordinary size and armature. Thorax black, very slightly shining, 

 nearly dull, with blackish brown pubescence. Mesopleura with uniform 

 bristles. Abdomen only slightly tapering, black, slightly greyish, dull; 

 the very short hairs almost not longer at the hind margins of the seg- 

 ments, but on the last segments the hairs at the sides are conspicuous 

 and somewhat dense, and at the hind margin of sixth segment they 

 are longish, longest at the sides; also at the end of the venter there are 

 distinct hairs. Hypopygium small, glossy above at the base, with 

 some not strong bristles on the sides; anal tube small and short, 

 dusky. Legs blackish brown or brownish, the front legs paler; front 

 tarsi distinctly thickened, metatarsus not longer than the two follow- 

 ing joints; the hairs below hind femora short; bristles on hind tibiæ 

 distinct, but somewhat small. Wings nearly clear, veins dark brown; 

 costa about 0,38 of the wing-length, costal divisions about as 4 — 1 — 1 ; 

 costal cilia long; angle at fork not small; fourth vein slightly and 

 rather evenly curved. Halteres dark brown, according to Wood 

 varying from yellow to black, independent of sex. 



Female. Similar to the male and front tarsi of the same shape, 

 but the end of abdomen without conspicuous hairs; halteres in my 

 specimen yellow. 



Length. About 1,5 mm. 



