Bombyliidae. 131 



this to the wing-root, the postalar cailus and a larger or smaller spot 

 at the apex of scutellum yellowish, the spot on scutellum soraetimes 

 so large that it only leaves the anterior corners of scutellum grey; 

 on the pleura a spot above the front coxæ, the upper part of sterno- 

 pleura, the metapleura and hypopleura yellowish. Thorax densely 

 clothed with depressed and with somewhat erect, yellowish hairs. 

 Abdomen likewise densely clothed with depressed, yellowish hairs, 

 completely hiding the ground colour; at the hind margin of the 

 segments erect, yellowish hairs; at the apex |^some blackish hairs. 

 Halteres quite yellowish white. 



Length 2,5—4 mm. 



Ph. pulicaria is somewhat common in Denmark; Charlottenlund, 

 Tisvilde, Odsherred; on Funen at Faaborg; in Jutland at Villebølle 

 north of Ribe, Sæby and Frederikshavn, and on Bornholm at Hasle. 

 My dates are from the last part of June to the end of July. It occurs 

 in sandy piaces and it is recorded as frequenting flowers of Hieracium 

 especially. 



Geographical distribution: — Most parts of Europe; towards the 

 north to middle Scandinavia; also in northern Africa. 



2. Ph. canescens Loew. 



1846. Loew, Linn. Entom. I, 390,3. — 1849. Zett. Dipt. Scand. VIII, 

 2979, 2. — 1862. Schin. F. A. I, 67. - 1903. Kat. palåarkt. Dipt. II, 203. 

 — Ph. pulicara p.p. Zett. Dipt. Scand. I, 195, 1. 



This species in most respects so greatly resembles the preceding 

 that I shall only treat it comparatively. Male. Frons and face slightly 

 protruding, much less than in pulicaria., the hairs all white and much 

 shorter than in pulicaria, especially those on the frons. The hairs on 

 occiput are white or whitish, likewise much shorter than in pulicaria., 

 and curved forwards at the tips. Wings with the cubital fork shorter 

 than in pulicaria and thus the base of the fork lying nearer to the 

 apex of the wing than the cross-vein closing the discai cell apically; 

 the two posterior branches issuing from the discai cell slightly con- 

 verglng. 



Female. Differing from the male in quite the same way as in 

 pulicaria; the yellowish spot on the scutellum somewhat incised on 

 the front margin. 



Length 4 mm, 



Fh. canescens is very rare in Denmark, only one specimen, a 

 male, has been caught on Bornholm at Allinge in July (H. J. Hansen) ; 

 it will probably be found to be more widely distributed in our 

 country. 



