160 Tachinidae. 



6. O. polita Mik. 



1883. Mik, Verhandl. zool. bot. Gesell. Wien, XXXIII, 255, 3. — 1891. 

 B. B. Denkschr. Akad. Wiss. Wien, LVIII, 367. — 1907. Kat. palåarkt. Dipt. 

 III, 551. — 1924. Stein, Arch. f. Naturgesch. 90, 6, 266, 5. 



Of this species I have seen only the female. Frons as broad as 

 the eye, slightly protruding. Orbits, cheeks, and jowls grey. Frontal 

 stripe black. Orbits and cheeks with fine and very sparse hairs; 

 jowls black-haired. Occiput grey, black-haired. Antennæ black, 

 third joint aboiit one and a half times as long as second; arista long- 

 plumose in basal two thirds. Palpi yellow. Thorax bluish, greyish 

 pruinose, especially on front part, and here with two narrow median 

 and two broad lateral stripes; between the median a narrow middle 

 stripe more or less distinct; three postsutural and a præsutural 

 intraalar bristle. Sciitellum with three marginal bristles. Abdomen 

 metallic green, shining, without pruinosity; third and fourth segment 

 with marginal bristles. Legs black. Wings somewhat brownish tinged; 

 apical cross-vein straight and first posterior cell very narrowly open. 

 Squamiilæ white, not hairy. H alteres yellowish to brownish. 



Length about 5 mm. 



O. polita is rare in Denmark, I know only four specimens, all 

 females; Egebæks Vang, Ruderhegn, Birkerød (the author), and on 

 Læsø (H. J. Hansen); the dates are in June and July; one of the 

 specimens is bred from a pupa found in flood refuse. 



Geographical distribution: — Europe down into Austria; not 

 kno\^^l north of Denmark. 



23. Cynomyia R. D. 



Species of rather large size and blue or greenish colour without 

 pruinosity on abdomen. Head a little broader than thorax, slightly 

 convex behind, higher than long. Frons in male about half as broad 

 as the eye, in female broader, somewhat protruding. Jowls broad, 

 about four fifths of the height of the eye. In male ocellar and inner 

 vertical bristles present, in female also somewhat small outer vertical 

 and two orbital bristles. Postocellar and occipital bristles strong. 

 Occiput with black hairs behind the postocular bristles. Frontal 

 bristles quite few, reaching to lunula, in male stopping before vertex 

 but above a small outwards directed bristle, in female this bristle 

 strong. Cheeks with very small sparse hairs on upper half. Vibrissal 



