230 Tachinidae. 



pruinose, wiih three more or less distinct dark stripes, confluent 

 behind; scutellum dark. Thorax with longish black hairs, among 

 the hairs generally a pair of præsutural and præscutellar acrosticlials, 

 or the præsutural irregular, in one row. On sternopleura long hairs 

 besides the bristles. Abdomen black, the segments with white or 

 bluish white front bands which are broader or narrower, and widening 

 towards the sides, so that the black colour forms smaller or larger 

 somewhat triangular spots; the spots on the three last segments 

 sometimes more or less divided into three, the last segment black on 

 apical half or more. Venter black. Abdomen black-haired, with mar- 



Fig. 67. Wing of P. elegantula. 



ginal bristles, on second segment none, on third and fourth a pair. 

 Legs black, with the bristles rather fme. Wings hyaline ; veins brown ; 

 posterior cross-vein placed at the middle betw^een medial cross-vein 

 and angle or about. Squamulæ white. Halteres yellow. 



Female. Somewhat similar with frons of the same or about the 

 same breadth; frontal stripe yellowish; third antennal joint relatively 

 a little shorter. Thorax nearly all whitish pruinose, the stripes slightly 

 marked. Abdomen with the black spots always divided into three 

 on each segment and besides with lateral spots, not seen from above; 

 venter whitish. Legs paler than in male, brownish or brownish yellow 

 with tarsi black. 



Length 4,5 — 5, 5 mm. 



P. elegantula is somewhat rare in Denmark, I know it only from 

 Skagen, taken in July (H. J. Hansen), and besides, two specimens 

 from earlier time without particular locality. The species is recorded 

 to occur in sandy piaces and near the nests of Formica fusca cinerea, 

 and Kramer (Abhandl. Nat. Gesell. Gorlitz, 1917, 28, 265) thinks 

 it develops in them. — I have examined Zetterstedt's type specimens 

 which are in our collection ; they are two males, not f emales as Sintenis 

 thought. 



