Asilidae. 59 



9. The prolongation of the eighth ventral segment in tlie 

 male rounded at the apex; female ovipositor with the 

 lamellaB wedged in 14. Eutohnus. 



— The prolongation of the eighth ventral segment in the 

 male roundly excised at the apex; female ovipositor 

 with free, slyliform lamellæ 15. Machimus. 



8. Philonicus Low. 



Species of medium or somewliat large size, only slightly hairy. 

 Face somewhat broad; epistomal cailus small, not reaching half the 

 height of the epistoma. Antennæ placed somewhat above the middle; 

 the hairs on the underside of the basal joints not long. The facets 

 in the front part of the eyes somewhat enlarged. Dorsocentral bristles 

 only present on the hind part of thorax. Scutellum with two marginal 

 bristles. Bristles at the hind margin of the abdominal segments pre- 

 sent. Legs somewhat slender; no spine-like bristles on the ventral 

 side of the front femora. Male genitalia som.ewhat slender; the arms 

 of the upper forceps with a large excision above at the apex; ventral 

 lamella pruinose, resembling the ventral segments. The female ovi- 

 positor conical, with spines at the apex, 



Of this genus 4 palæarctic species are known; one is found in 

 Denmark. 



1. P. albiceps Meig. 



1820. Meig. Syst. Beschr. II, 310, 8 (Asilus). — 1849. Low, Linn. 

 Entom., IV, 145, 74. — 1862. Schin. F. A. I, 144 (Asilus). — 1903. Kat. 

 palaarkt. Dipt. II, 142. — 1842. Asilus alhiharhus Zett. Dipt. Scand. I, 172, 7 

 et 1849. VIII, 2969, 7 et 1855. XII, 4570, 7. 



Male. Eyes in the living specimen slightly metallic, brownish 

 with a slight greenish cast. Face whitish hairy; epistomal beard white 

 with some black hairs above. Frons and vertex grey. Palpi black 

 with yellow hairs. Occiput grey with yellowish bristles above and 

 white hairs below. Antennæ black. Thorax light yellowish grey, the 

 stripes brown, the middle stripe the darkest, this is broad in front, 

 narrowed posteriorly; it has on the front part an indistinet middle 

 line which is generally cleft anteriorly; the side stripes large. Scu- 

 tellum grey. The thoracic disc sparingly clothed with short, erect. 

 black hairs. The bristles generally black but not rarely intermingled 

 with pale ones; the scutellar bristles pale. Pleura greyish pruinose; 

 some longish, w^hitish hairs on ptero- and sternopleura ; the vertical 

 rows of long hairs on meta- and hypopleura yellowish. Abdomen 

 greyish brown with an indistinet, dark brown middle line; with the 

 light from behind there are light grey hind margins on the segments. 



