Stratiomyiidae. 49 



The species of Odontomyia are, like those of Strcdiomyiu, some- 

 what sluggish; they occur in the vicinity of water and are generally 

 seen on flowers of Unibeiliferæ or on rushes and reeds at the horders 

 of lakes and ponds, sometimes in great numbers. 



Of tiie genus 25 species are icnown from tlie palæarctic region 

 mostiy from tlie more southern parts, 6 species have hitherto l^een 

 found in Denmaric. 



Tahle of Species. 



1 . First joint of antennæ twice as along as the second 2. 



— First joint of antennæ slightly longer than, or of equal 



lenght with. the second 3. 



2. Abdomen above with silvery shining pubescence (c?) or 



with golden shining transverse bands ($) 2. argentata. 



— Abdomen black with whitish yellow, narrow, transverse 



side spots 3. microleon. 



3. Abdomen above entirely black 1 . tigrina. 



— Abdomen above not entirely black, with yellow spots, or 

 greenish with black designs 4. 



4. Abdomen black with yellow side spots, larger species . . 4. ornata. 



— Abdomen green with a black middle band, smaller species 5. 



5. The black abdominal band laterally dilated at the front 

 margin of the segments, thus tending to transverse bands ; 

 antennæ dark, not very short. head in the male not 

 especially large, yowls in the female each with a black 



spot 5. hijdfoleon. 



— The black abdominal band only somewhat incised; an- 

 tennæ reddish yellow . short , head in the male large, 



yowls in the female entirely yellow 6. angidata. 



1. O. tigrina Fabr. 

 1775. ÅYra^wmys, Fabr. Syst. Ent. 760. — 1846. Loew, Linn. Entom. I, 

 468, 1. - 1862. Schin. F. A. I, 17. - 1903. Kat. palaarkt. Dipt. II, 27. — 

 1842. Stratiomijs nigrita, Zett. Dipt. Scand. 1^ 138, 7. 



Male. Eyes greyish hairy, the facets in about the Iower half 

 smaller than above, the dividing line not very sharp; colour greenish 

 with a bluish band on the dividing line. Front and face somewhat 

 protruding, black with long blackish hairs, front with an impressed 

 longitudinal line. Antennæ black, tirst joint somewhat longer than the 

 second. Thorax bluish black, somewhat shining; pubescence rather 

 long, yellowish on the middle of the disc, darker on the sides and 

 beneath. Scutellum black, spines yellow. Abdomen bluish black, 

 somewhat shining, with dark brownish or blackish pubescence. Venter 

 yellow with black margin and yellow pubescence. sometimes with a 

 pair of small black spots on the middle of the third and fourth 

 segments. Femora brownish black with the extrenie tips yellow; tibiæ 



4 



