Empididae. 171 



the third and fourth joint on the anterior tarsi as long as broad; 

 hind tibiæ somewhat compressed and a little curved. 



Length 3-3,5 mm. 



The determination of the species is certain, as Zetterstedt's type- 

 speeimen, sent to him from Stæger, is in our coUeetion. Strobl's 

 determination is no doubt also correct; the author says, that the 

 species mav have sometimes six scutellar bristles; all my specimens 

 have four. As Zetterstedt says; „Stæg. in litt." the name is originally 

 due to Stæger, 



The species is related to the four preceding, but it is much 

 darker, the inner thoracic stripes a little approximate, and the balteres 

 not yellow but dark. All five species are related and show the com- 

 mon character, that the occiput is less haired, the hairs chiefly pres- 

 ent at the eye-margin. 



H. histriata seems to be somewhat rare in Denmark; Lersøen 

 (Stæger, Zetterstedt's type-specimen), Ermelund, Lyngby Mose and 

 Donse Dam (the author); on the latter locality I took it in some 

 number, flying over the pond, but only males, and I have only taken 

 one female. It is perhaps an early species, my dates are ^^/5 — ^/«. 



Geographical distribution:— Northern and middle Europe down into 

 Spain (var. cantahrira Strobl); towards the north to southern Sweden. 



18. H. pilipes Zett. 

 1838. Zett. Ins. Lapp. 555, 5. — 1842. Zett. Dipt. Scand. I, 346, 13. 

 — 1903. Kat. palåarkt. Dipt. II, 254. 



Male. Vertex and frons velvet black, the latter with a small, 

 brownish triangle above the antennæ; epistoma dark grey; palpi 

 greyish black, witli long, black hairs ; proboscis somewhat long, labrum 

 as long as the head is high. Occiput dark to blackish brown, with 

 black hairs; downwards the hairs are brownish. Antennæ black, 

 somewhat long. Thorax dark brown, with four, somewhat indistinct, 

 darker stripes, the median approximated, abbreviated behind, the 

 lateral very indistinct. The dorsocentral and acrostichal bristles 

 somewhat long, black; the former uniserial, long behind, the latter 

 biserial. Further a humeral bristle, a posthumeral, two notopleural, 

 a supraalar and a postalar bristle, all black, but besides there are 

 other, somewhat strong hairs on the sides of the disc and in the 

 præsutural depression. Pleura dark grey or brownish grey. Scutellum 

 with four to six black marginal bristles. Abdomen grey or brownish 

 grey, with black hairs and short marginal bristles on the segments. 

 Venter grey, short-haired. Exterior genitalia robust, almost not com- 

 pressed, black-haired, the hairs not or slightly longer above; the 



