* Empididae. 129 



domen generally with bristles at the hind margin of the segments. 

 Exterior genitalia small or large. Legs with bristles; metatarsi not 

 thickened; no short, erect pubescence on the anterior side of the 

 middle tibiæ. Legs in the female very rarely somewhat pennate (in 

 no Danish species). Wings sometimes broad, especially in the female; 

 veins complete (only in livida the branches of the discai vein slightly 

 abbreviated) ; cubital vein terminating at some distance from or very 

 near the apex of the wing. Discai cell more or less pointed outwards. 

 Axillary lobe well developed, axlllary angle acute and deep; alula 

 present, but small. 



Tahle of Species. 



1. Thorax with three stripes 2. 



— Thorax with four stripes 5. 



2. The branches of the discai vein abbreviated just before 



the margin 26. livida. 



— No abbreviated veins 3. 



3. Acrostichal bristles biserial; metapleural bristles yellow 27. nigricans. 



— Acrostichal bristles pluriserial; metapleural bristles black... 4. 



4. Scutellum with more than four marginal bristles 24. tessellata. 



— Scutellum with four marginal bristles 25. hrevicornis. 



5. Wings strongly brownish tinged, somewhat broad in the 



male, very broad in the female 28. horealis. 



— Wings slightly tinged and not broad 29. opaca. 



M. E. tessellata Fabr. 



1794. Fabr. Ent. Syst. IV, 405, 10, et 1805. Syst. Antl. 140, 13. - 

 1822. Meig. Syst. Beschr. 111,17,1. — 1842. Zett. Dipt. Scand. I, 368,1.— 

 1862. Schin. F. A. I, 103. — 1903. Kat. palaarkt. Dipt. Il, 245. — Emins 

 livida (nonL.): 1781. Fabr. Spec. Ins. II, 471, 5, et 1805. Syst. Antl. 139, 10. 



Male. Eyes contiguous; frontal triangle and epistoma grey. Occi- 

 put grey with black bristles. Labrum about twice as long as the 



Fig. 42. Antenna of E. tessellata. X 50. 



head is high; palpi black, with long, black hairs. Antennæ black, as 

 long as the head, the first joint about twice as long as the second; 

 the two first joints greyish, with somewhat long, black hairs. Thorax 

 grey or more or less brownish, with three brow^nish black stripes, the 

 median somewhat narrow^ and abbreviated behind ; further there is a 



9 



