115 Orthorrhapha brachycera. 



hind margin of the sixtli segment there are also yellow hairs, and 

 sometimes slight traces may also appear on the fifth segment. 



Length 10—13 mm. 



This species varies somewhat in the colour of the clothing of 

 long hairs, especially on the abdomen, from deep yellow to pale, 

 nearly whitish yellow. 



A. paniscus is not rare in Denmark and may be present in all 

 suitable localities; Vedbæk, Tisvilde, Rørvig, Jægerspris, Faxe; in Jut- 

 land at Søndervig and Skagen, and on Bornholm at Rønne and 

 Hasle. My dates are ^h — ^^9. It occurs in similar localities to the 

 preceding species, flying in the sunshine, and often sitthig on the 

 sand; there seems to be some marked difference between the sexes 

 with regard to the period of occurrence ; I have sometimes caught the 

 species in not small numbers, but only males, and this is also shown 

 by the collections of our Museum; probably the males appear some 

 time before the fem åles, 



Geographical distribution: — Europe down into Italy; towards 

 the north to middle Scandinavia. 



7. A. hottentottus L. 



1761. Linn. Fn. Suec. 1787. (Musca). — 1903. Kat. palåarkt. Dipt. 

 II, 177. — A. flavus 1820. Meig. Syst. Beschr. II. 143,1. — 1842. Zett. 

 Dipt. Scand. I, 195, 1 et 1849. VIII, 2980, 1 et 1855. XII, 4583, 1. - 

 1862. Schin. F. A. I, 51. 



This species resembles paniscus to a high degree, so that a de- 

 scription by comparison is sufficient. 



Male. The depressed, yellow hairs on the frons are generally 

 present to a greater degree than in paniscus. The yellow, scaly hairs 

 on the abdomen are more distinct, forming more or less distinct 

 bands on the second, third and fourlh segments; the bands are 

 broadest at the sides, narrowed in the middle and here often inter- 

 rupted, they are on the whole only slightly visible, being nearly quite 

 hidden under the clothing of long hairs; the black hairs on the last 

 segments are less pronounced than in paniscus; the hair tuft at each 

 corner of the seventh segment is yellow. The scaly hairs on the legs 

 are yellow to a greater degree than in paniscus and also more or less 

 yellow on the tibiæ; the front tibiæ with small bristles as \n paiiiscus. 

 The patagium-like piece at the base of the wing is not silverwhite but 

 yellow, often with some brown scales. The wings seem to be more 

 hyaline, the brownish fumigation not going beyond the subcostal vein. 



Female. The bands on the abdomen as in paniscus., that on the 

 third segment a little more distinct. 



