Dolichopodidae. 39 



cised above, the oiiter lamellæ thus placed near the middle; these 

 latter are small, more or less hidden; the inner lamellæ are for the 

 most part hidden, only some small, styliform appendages may be 

 seen. In the female the abdomen is a little less slender; it consists 

 of five normal segments, the rest more or less hidden, and it ends 

 with a small ovipositor, consisting of two styles. Abdomen has either 

 no dot-like impressions at the sides, or they are indistinct, I have 

 only observed them on the second segment of the female of pallida, 

 just as remarked by Oldenberg (Zeitschr. f. syst. Hymn. und Dipt. IV, 

 1904,71). There are short, somewhat indistinct hindmarginal bristles, 

 only long on the first segment. Legs long and slender, the coxæ 

 elongated; in the male the front tarsi may be adorned [quadri- 

 faciata); the hind metatarsus shorter than, rarely as long as the 

 second joint, without bristles above. The legs are haired with short 

 hairs and have some bristles; the posterior tibiæ have apical bristles, 

 the front tibiæ none; the hind coxæ have one bristle on the outer 

 side; the femora have no preapical bristles, but there may be a small 

 hair at the apex on the posterior side of all femora. There are two 

 claws, two pulvilli, and a small, lobe-shaped empodium with bristles 

 or spines below; sometimes the claws and pulvilli on the front tarsi 

 are enlarged in the male (Erichsoni^ and to a less degree cilipes [non 

 Danish]). The Avings have the mediastinal vein terminating in the 

 subcostal vein; the discai vein is more or less bent, and with a 

 distinct convexity at the bend; the anal vein somewhat long and 

 reaching the margin, sometimes it is rather long; the posterior cross- 

 vein about in the middle or more apical; the axillary lobe is gener- 

 ally somewhat developed, sometimes wanting in the male {suturalis). 

 Squanmlæ small, and the angulary lobe not much developed; it has 

 a fan of long hairs; the inner part of squamulæ is short-haired. On 

 the pteropleura below the squamulæ there is a small, somewhat 

 membranous process. — In some foreign (African) species the discai 

 vein is straight or almost so, and the posterior femora have a pre- 

 apical bristle — . 



The developmental stages of N. quadrifasciata have been described 

 by Beling (Arch. fiir Naturgesch. 48, I, 1882,223). The larva is 9 mm 

 long, 1,2 mm in diameter, cylindrical, yellowish white; it consists of 

 twelve segments; the last segment is somewhat shorter than the 

 eleventh, and somewhat thickened towards the end; it has very shal- 

 low, longitudinal furrows; the posterior surface is rounded, without 

 teeth, and has in the middle the spiracles. The prothoracic spiracles 

 lie on the second segment. The fifth to eleventh segment have on 

 the ventral side small, transverse swellings (Kriechschwielen). — The 



