Dolichopodidae. 159 



Length 4,6—5 mm, 



This species is somewhat similar to the foregoing, but distinguished 

 by many characters, as tiie colour of the second antennal joint, the 

 colour of abdomen with its dark margins to the segments, the struc- 

 ture and colour of the legs and the bristles on them, and by the 

 venation of the wing; in the male the hypopygium is quite different. 



T. notafus is much less common in Denmark than ammobates ; 

 Fure Sø; on Funen; in Jutland at Hulsig north of Frederikshavn, and 

 on Bornholm. My dates are ^Vt — ^^/s; Stæger records it from Born- 

 holm in September. It occurs on similar localities as ammobates, but 

 in smaller number, thus I have taken it at Fure Sø together with 

 ammohates, but much less abundant. I found it not rarely sitting 

 on stones. 



Geographical distribution : — Europe down into Spain and Italy, 

 and further in Asia Minor and North Africa ; towards the north to 

 middle Sweden. 



3. T. insignis Stann. 



1831. Stann. Isis 1831, 270, {Ammohates). — 1842. Stæg. Krøyer's 

 Tidsskr. IV, 12 {Ammohates). — 1862. Schin. F. A. I, 204. — 1903. Kat. 

 palåarkt. Dipt. 11, 307. 



Male. Vertex and frons brown. Epistoma yellow or yellowish 

 brown, scarcely reaching quite to the lower margin of the eyes. 

 Palpi dark. Occiput greenish; postocular bristles yellow below, black 

 above. Antennæ about as long as the head, third joint short^ not 

 or slightly longer than broad, rounded or very truncately pointed at 

 the apex ; the basal joint is yellow, sometimes a little darkened above, 

 the others black. Thorax somewhat æneous, but strongly brown or 

 brownish grey pruinose, not or almost not shining; scutellum æneous, 

 greyish in the middle. Pleura æneous, greyish or brownish pruinose ; 

 propleura with black hairs and a black prothoracic bristle. Abdomen 

 æneous or greenish, sometimes quite green, with more or less coppery 

 reflexes ; it has indistinct, dark, generally somewhat coppery hind 

 margins to the segments and is greyish white pruinose; with the light 

 from behind it is quite pruinose with a dark middle line, and a faint 

 spot at each side on the segments; it is clothed with short, black 

 hairs, and has longish hindmarginal bristles, only slightly longer on 

 the first segment. The hypopygium resembles that of ammobates, but 

 is smaller; the posterior ventral lobes are of quite the same shape, 

 and likewise with two hairs at the end ; the outer lamellæ are shorter 

 than in ammohates, less triangular, and rounded at the end, they have 



