Dolichopodidae. 333 



Female. Quite agreeing with the male, 



Length 2,2 — 2,8 mm. 



M. truncorum is common in Denmailv, though scarcely as commoii 

 as jaculus; Amager, Vester Fælled, Dyrehaven, Hareskov, Hillerød, 

 Tyvekrog, Vedbæk, Tisvilde, Rørvig, Slagelse; on Funen at Odense 

 and Strib ; in Jutland at Hald near Viborg and at Frederikshavn. My 

 dates are ^'V« — ^^/i«. It occurs on walls, generally in great nmiiber, 

 and also on tree-trunks; Verrall states that it prefers M^alls and houses. 

 Kowarz quotes Zetterstedt vvrith a querry; I have examined Stæger's 

 specimens, and as these are no doubt identical with Zetterstedt's 

 species, this is certainly truncorum. 



Geographical distribution: — Europe down into Spain and Italy; 

 towards the north to northern Svveden, and in Finland. 



13. M. petrophilus Kow. 



1877. Kow. Verhandl. zool. bot. Geseli. Wien, XXVII, 71, 27, Taf. II. 

 Fig. 18. — 1903. Kat. palåarkt. Dipt. II, 339. 



Male. Vertex and frons brownish grey pruinose. Epistoma metallic 

 green, below the antennæ brownish pruinose, at the transverse ridge 

 greyish and below the ridge shining. Paipi black. Occiput grey pruinose ; 

 postocular bristles whitish, the uppermost darker. Antennæ black, 

 third joint short, roundish; arista almost apical, long. Thorax densely 

 grey pruinose with three brown or somewhat coppery stripes, the 

 lateral less distinct or almost wanting; the acrostichal bristles very 

 short, yellowish ; the dorsocentral rows consisting of four long bristles, 

 and according to Kowarz sometimes with a small bristle in front. 

 Scutellum with four bristles. Pleura æneous, greyish pruinose; pro- 

 pleura with three or four whitish prothoracic bristles. Abdomen 

 somewhat metallic green or æneous and somewhat greyish pruinose, 

 clothed with short, yellow hairs, and with long hindmarginal bristles 

 on the first segment. Hypopygium of medium size or somewhat 

 large, black; the eighth segment greyish pruinose, with pale hairs. 

 Legs black, coxæ grey pruinose, the knees reddish yellow; hind meta- 

 tarsus short, almost only one third of the second joint, a little excised 

 and with a small tooth at the base. The legs have short, pale hairs; 

 the bristly hairs on the anterior coxæ and the bristle on the hind 

 coxæ likewise pale ; the hairs below the femora distinct, especially on 

 the hind femora which also have longer hairs above on the basal 

 part; middle tibiæ with a pair of bristles near the base, hind tibiæ 

 here with a small bristle. Wings somewhat narrow and rather broadly 

 rounded at the apex, about hyaline; veins blackish brown, the last 



