Dolichopodidae. 61 



long, thin hair at the tip. There are Iwo small claws, two pulvllli 

 and a narrow, somewhat comb-shaped empodium. The wings are of 

 common sliape; tiiey may vary a little in breadtii in tlie various 

 species, and may be somewhat narrowed towards the base; some- 

 times they are a httle shortened; in the males there are in many 

 species a smaller or larger swelling on the costa, where the subcostal 

 vein unites with it; the mediastinal veln terminates in the subcostal 

 vein; the discai vein has a double bend, which may be larger or 

 smaller, and obtuse or more rectangular, sometimes quite rectangular 

 and with small veinlets from the angles; the bend lies on a distinct 

 convexity. The posterior cross-vein is placed towards the middle of 

 the wing or more apically. The axillary lobe varies in the various 

 species from quite small to rather large, and the anal vein is in 

 accordance directed somewhat downwards or more forwards; it does 

 not reach the margin. The squamulæ have the angulary lobe some- 

 what well developed, bearing a fan of long hairs at the margin, the 

 hairs also often covering the front side; the inner part of the squa- 

 mulæ has short hairs. 



The developmental stages of several species of DoUchopus are 

 known. De Geer describes and figures these stages of D. ungulatus 

 {Nemotelus aetieus) (De Geer: Mem. VI, 1776, 198, Tab. XI, Fig. 14-18); 

 he found the larvæ in May in the ground; one transformed to pupa 

 on ^/e and to imago on '^'^/g. Stæger mentions (1. c. 27) that he has 

 found the larvæ and pupæ to D. popidaris under moss on old stubs 

 of beeches. The larva of D. latilimbatus is described by Belling (Arch. 

 flir Naturgesch. 41, I, 1875, 53); it was found in the ground on a 

 meadow on */6, and the imago came on ^^/t. Further Beling describes 

 (ibid. 48, I, 1882, 227 — 30) the larvæ of D. discifer^ popularis, trivialis 

 and longicornis, of the first and last also the pupa; the larva of 

 discifer was found in the ground on ^^/e and developed on ^''/t, that 

 oi popularis was found on ^^/4 and developed on ^Vs; trivialis was 

 found on ^^/s in a decaying beech, the imago camo came on ^^/t; 

 lo7igicornis was found in the ground on a field and developed on 

 ^^-^^Ih, another specimen was found on ^/o and developed on ^/e. 

 Finally Brauer describes and figures the larva of D. ungulatus (æneus) 

 (Denkschr. d. Kais. Akad. d. Wissensch. XLVII, 1883, 44, Taf. IV, Fig. 

 72—76) as found in hollow poplars. I have myself examined the 

 pupa of D. lepidus, and larvæ and pupæ of D. claviger and popularis. 

 The larva is cylindrical, whitish or slightly yellowish; it has twelve 

 segments; the head-capsule is black, small and retractile; the other 

 segments increase evenly in length behind; the last segment is 

 short and a little swoUen, it is obliquely cut at the end and has 



