Empididae. 85 



6. Discai cell not pointed outwards ; in the male fron 



or hind metatarsi, or both more or less, sometimes • 



only slightly thickened, legs in the female pennate 



(except in cinerea) ; generally small species VI. Fterempis. 



— Discall cell more or less pointed or narrowed out- 

 wards; in the male front and hind metatarsi not 

 thickened, legs in the female not pennate; generally 

 larger species VII. Empis. 



I. Subg. Xanthem'pis Bezzi. 

 This subgenus is, at all events with regard to its Danish species, 

 rather well characterised. The species are all yellow, generally with 

 dark markings to a higher or lower degree. They are of medium size 

 and only slightly hairy. The eyes widely separated in both sexes and 

 with all facets small. The head is long and pear-shaped as the occi- ^ 

 put is drawn conically out. The antennæ long, as long as or generally 

 longer than the head; the first joint considerably longer than the 

 second, very short haired, the third much elongated. The chitinous 

 lists forming the clypeus broad, almost occupying the whole front 

 side of the oral cone ; in one of the species, bilineata, the whole front 

 side of the cone is chitinised, and the cone seems therefore to be 

 less retractile and is generally stretched out. Prothorax more or less 

 well developed, forming a neck-shaped part; above it is divided into 

 two more or less distinct lobes, with short, spine-like bristles; (this 

 structure is most developed in hilineata, nearly wanting in lutea). The 

 thoracic bristles short and thorax otherwise bare. Dorsocentral bristles 

 uniserial; no acrostichal bristles. One humeral bristle, one, or (6^7mmto) 

 no posthumeral, one, or [trigramma) two notopleural, no, or {tri- 

 gramma and lutea) one supraalar, and one postalar bristle. Meta- 

 pleura with few bristles. Scutellum with two or four bristles. Ab- 

 domen slightly haired, without bristles at the hind margins of the 



Fig. 23. Wing of E. stercorea. 



segments. Male genitalia large, of complicated shape; the styli of the 

 female ovipositor somewhat long. Legs rather long, not strong, in 

 both sexes slightly hairy. Wings somewhat long, with strong veins; 

 cubital vein curving downwards, terminating at the apex; discai cell 



