Empididae. 293 



Geographical distribution: — Europe dowii into Italy; towards 

 the north to middle Sweden, and in Finland ; it seems to be rarer 

 towards the nortli than flavipes. 



3. T. strigifrons Zett. 



1849. Zett. Dipt. Scand. VIII, 3005, 4 — 5. — 1903. Kat. palåarkt. 

 Dipt. II, 28S. 



Male. Vertex and frons grey; epistoma white; palpi small and 

 short, white haired. Occiput grev, with yellow bristles above, white 

 hairs below. Antennæ black, the third joint elongated, twice or more 



Fig. 134. Antenna of T. strigifrons. X 100. 



than twice as long as broad at the base, and slightly shorter than 

 the arista; it is distinctly pubescent. Thorax brownish grey pruinose; 

 all bristles yellow. Scutellum with two yellow marginal bristles and 

 on each side a small hair. Pleura grey pruinose; above the middle 

 coxæ a black, pohshed spot. Abdonien black, shining, without bands 

 it is clothed with slightly longish, pale yellowish hairs. Venter black. 

 Legs yellow, tarsi black annulated. Front femora somewhat, middle 

 femora somewhat more thickened. The legs are yellow haired; front 

 tibiæ with some small bristles, which are only slightly stronger than 

 the other hairs. Wings hyaline or very slightly yellowish. Veins pale 

 brown. Halteres yellowish. 



Female. Similar to the male; abdomen pointed. 



Length 2,-5 to about 3 nnn. 



This species is distinguished from flavipes by the longer third 

 antennal joint, and from maculipes by the absence of bands on ab- 

 domen, the annulated tarsi, as also the third antennal joint is a little 

 shorter. Zetterstedt says „Stæg. in litt.", so that the name is originally 

 due to Stægef. 



T. strigifrons seems to be somewhat rare in Denmark, besides 

 the specimens mentioned by Zetterstedt we have still some specimens 

 from Stæger, probably taken at Ordrup; further it has been taken at 

 Ørholm, Tisvilde and in Jutland at Lønstrup and Frederikshavn; it 

 will probably prove to be more common when better recognised, but 

 it has hitherto often been confused with maculipes and flavipes, also 

 by Stæger. My dates are ^^Ir^—'^'^is. 



