LeptidiJae. 149 



Of the genus 24 species occur in tiie palæardic region 4 of which 

 have hitherto been found in Denmark. 



Table of Species. 



1. Wings without any fumigated spot; abdomen black or greyish 

 black 2. 



— Wings with a fumigation, stretching from the stigma down- 

 wards (sometimes nearly disappearing lu the female) ; abdo- 

 men more or less yellow 3. 



2. Legs with the feinora black 1. auratus. 



— Legs entirely yellow 4. aitreus. 



3. Apical joint of antennæ brownish black, apex of palpi brown ; 

 abdomen brown with yellow bands : stigma and fumigation 



distinct 2. Hithecula. 



— Antennæ and palpi yellow; abdomen yellow; stigma and 

 fumigation less distinct 3. hiteolus. 



1. C. auratus Fabr. 



1805. Atherix. Fabr. Syst. Antl. 73, 4. — 1903. Kat. palaarkt. Dipl. 

 11, 84. — 1842. Chri/soplla atrata, Zett. Dipt. Scand. I, 222. 1. — 1862. 

 Chri/sopila atrata, Schin. F. A. I, 176. 



Male. Frontal triangle blackish, cheeks grey, epi.stoma blackish ; 

 yowls with brownish black or black hairs. Antennæ and palpi black. 

 Thorax black, on the disc deeply black velvet pruinose, with long, 

 black and more depressed, golden hairs, the latter very liable to fall 

 off; in front of the mesopleura and on the metapleura there are tufts 

 of golden hairs. Abdomen deeply velvet black, with long, chiefly 

 yellow, hairs and somewhat depressed, golden hairs, the latter especi- 

 ally forming a fringe on the first segment. Venter black, slightly 

 shining, with yellow hairs. Coxæ and femora black; tibiæ and tarsi 

 brownish yellow, the latter blackish towards the ends. The anterior 

 coxæ with long, black hairs, the hind coxæ with a small tuft of yel- 

 lowish hairs, femora with somewhat longish, black hairs beneath and 

 with depressed, golden hairs above, for the rest the legs are short 

 haired; the tibiæ, e.specially the hind ones, very finely spinulous. 

 Wings yellow, somewhat iridescent, the veins brownish black, a tuft 

 of black hairs at the base of the costa; stigma brown. Halteres black, 

 the base of the peduncle paler. 



Female. Front broad, greyish. Antennæ blackish grey. Thorax 

 grey with three black, longitudinal stripes, the middle narrow, but 

 this design of thorax is in fresh or well preserved specimens more or 

 less hidden under the covering of depressed, pale golden or brassy 

 hairs. Abdomen on the dorsal side densely covered with similar hairs 

 and thus pale golden or brassy ; when the hairs fall off the abdomen 

 becomes black, somewhat shining. 



