Chaetoneurophora. 95 



1. Ch. fennica Beck. 



1901. Beck. Abhandl. zool. bot. Gesell. Wien I, 22, 8 (Phora). — 1906. 

 Wood, Ent. Month. Mag. 2, XVII, 194, 266 (Phora). - 1910. Kertész, Cat. 

 Dipt. VII, 392 {Phora). - 1912. Malloch, Proc. U. S. Nat. Mus. 43, 424. - 1914. 

 Brues, Bull. Wisc. Nat. Hist. Soc. XII, 87. — 1918. Schmitz, Jaarb. Natuurh. 

 Genootsch. Limburg 1917, 91. 



Male. Frons considerably broader than long, black, bristles 

 strong, all three rows placed on nearly straight lines. Antennæ black- 

 ish brown, third joint somewhat large and a little elongated, pointed 

 towards the apex; arista short-pubescent. Palpi of ordinary size, 

 deep yellow, with black, not long bristles, Tliorax black, slightly 

 shining, with blackish or dark brownish pubescence and with one 

 pair of dorsocentral bristles. Pleura with some indeterminate brownish 

 markings and generally also a brownish point at humeri and postaiar 

 calli. Abdomen black, slightly greyisli, first segment generally some- 

 what indistinctly brownish on the disc and the membrane in front 

 of it narrowly white; first, second and sixth segments somewhat 

 elongated; abdomen very sparingly clothed with short, black hairs, 

 forming a distinct row along the hind margin of each segment, sixth 

 segment with somewhat longer hairs and at the hind margin with 

 long hairs; the abdominal hairs are most distinct at the lateral margins, 

 and here somewhat long on second segment. Hypopygium of fair 

 size, greyish black, when fuUy exposed shining above at base; it has 

 somewhat long hairs posteriorly; it is unsymmetrical, the right side 

 obliquely cut and below it a somewhat narrow piece with long hairs 

 at the margin, the left side larger, but fissured; below, at the base 

 of the hypopygium a pair of curious, yellow, hook-shaped pieces 

 are seen; anal tube of medium length, blackish with paler apex and 

 with longish hairs. Legs brown, hind femora sometimes more blackish 

 brown; front tibiæ with a dorsal bristle near the middle, middle tibiæ 

 with a pair near the base and an anterior near apex, hind tibiæ with 

 two anterior bristles, one about at the end of the first third and one 

 near apex; middle tibiæ with one, hind tibiæ with two apical spurs. 

 Wings clear or a little yellowish; thick veins yellowish brown the 

 others pale; costa reaching considerably beyond the middle, 1 about 

 equal to 2 + 3 or a little longer; fork acute; costal cilia short and fme; 

 fourth vein issuing at the base of the fork, rather strongly s-like 

 curved at the base, the following veins indistinct at their apices. Hal- 

 teres deep yellow. 



Female. Similar to the male, the antennæ a little smaller, bristles 



