Straliomyiidae. 45 



the pupa case, it becomes bent double in such a way that there is 

 an angle with the point turned ventrally between tlie eight and sevenlh 

 abdoniinal segments, and one turned dorsally between the sixth and 

 fifth and generally again one turned ventrally between the fourth and 

 third. the last sonietinies more rounded. 



<S'. furcata is the most common species of Stratiomyia in Denmark, 

 and it is frequent in localities near water, on flowers of several 

 Umbelliferæ ; vicinity of Copenhagen, Utterslev Mose, Ordrup Mose, 

 Fortundammen, Lyngby Mose, Furesø, Hillerød, Frerslev Hegn, Donse 

 Dam, Jægerspris, Teglstrup Hegn and at Lejre near Hoskilde; Lange- 

 land at Tranekær; Lolland at Langensø and Maribo and Funen at 

 (3dense, Vellinge and Lundeborg on the eastern coast. It has been 

 taken from ^^/c— ^'Vs. The larvæ have been taken in water in 

 Utterslev Mose on -'';4 and on Vesterfælled on "je, small to half 

 grown larvæ were taken in Fortundammen on ^^/s, and larvæ and 

 jjupæ were taken in water in Frerslev Hegn on *;'?, and on this 

 occasion there were many cast pupa-skins seen ; the escape of the 

 imago foUowed in the last case from *"r, to '.'s. The pupæ floated 

 on the water surface among Confervæ. 



Geographical distribution: — Europe down into France, towards 

 north to Finland and middle Sweden. 



3. S. chamæleon L. 



176L MiisQa, Linn. Fn. Suec. 1780. — 1842. Zett. Dipt. Scand. I, 134, 1. 

 — 1862. Schin. F. A. 1, l(j. — 1903. Kat. palåarkt. Dipt. II, 18. 



Male. Eyes bare. unicolorous. facets below smaller than above. 

 the dividing line moderately sharp. tlie small facets stretching a little 

 upwards at the hind margin. Front and face black, with a yellowish 

 stripe at the inner eye-margin; face yellowish grey haired. The hinder 

 eye-margin rather broad at the sides, narrowly yellow at the eyes, 

 whitish haired, the margin decreasing in breadth upwards and dis- 

 appearing before the ocellar tubercle. Antennæ black. Thorax brownish 

 black, with yellow or yellowish grey pubescence. Scutellum yellow 

 with a black. triangular basal spot. Abdomen black with bright yellow 

 side spots on the second. third and fourth segments, that on the 

 second segment large, subtriangular, the other smaller, broadest in- 

 wardly; on the fifth segment a yellow, triangular apical spot. Venter 

 yellow with a black basal spot and black front margins of the segments, 

 not reaching the side margins and more or less interrupted in the 

 middle, that on the second and also often on the third segment forming 

 a rather small spot on each side. Abdomen above, long but somewhat 

 sparingly, yellow haired, the pubescence being shorter but denser 



