Dolichopodidae. 167 



Ihan the second joint. The legs have short hairs, the coxæ bristles 

 at the apex; the middle coxæ have besides a bristle on the front 

 side near the outer edge, and the hind coxæ a bristle in the middle 

 on the outer side; posterior femora with one preapical bristle; the 

 tibiæ have various bristles, and besides apical or preapical bristles^ 

 which are small on the front tibiæ ; the dorsal bristles on the middle 

 tibiæ are generally three antero- and two postero-dorsal bristles; the 

 hind metatarsi have no bristles. There are two small claws, two 

 pulvilli and a narrow empodium with long bristles below and thus some- 

 what comb-shaped. The wings may sometimes have thickenings on 

 the costa in the males; the mediastinal vein terminales in the sub- 

 costal vein; the discai vein may have a distinct bend and towards 

 the end be strongly converging towards the cubital vein, or the bend 

 may be smaller or quite wanting, and the discai and cubital veins 

 be less converging or almost parallel; the first posterior cell is thus 

 narrowly or more widely open; the posterior cross-vein lies about in 

 the middle, or sometimes a little more basally or apically; anal vein 

 not reaching the margin. There is a distinct convexity on the last 

 part of the discai vein, more or less near to the cross-vein. The alar 

 squamulæ have a somewhat developed angulary lobe with a fan of 

 long hairs; the inner part of the squamulæ have shorter hairs. 



The main distinguishing character between this genus and Doli- 

 chopus is the want of bristles on the hind metatarsi, and the small 

 or wanting bend of the discai vein. 



The developmental stages of the genus seem hitherto not to have 

 been known; I have examined a pupa of H. metallicus; it resembles 

 the pupa of Dolichopus ; on the front side of the head lie the antennal 

 sheaths, directed downwards and with the ends a little diverging; at 

 the base of each sheath there is a strong, bifid tooth, the two teeth 

 are quite approximated ; above each of them is a hair; longer down- 

 wards on the sheaths is a small tooth, marking the apex of the 

 second antennal joint, and likewise with a hair above, and below a 

 weak outline of the rest of the antennæ with the arista is seen. On 

 the thoracic disc are some short hairs; at the front end of thorax 

 there are two long, thin and pointed spiracular tubes, which have a 

 small, black ring somewhat below the apex; the second to eighth 

 abdominal segments have above a transverse girdle of short, flat, 

 brown spines; the sheaths of the hind legs reach almost to the end 

 of abdomen. The pupa was lying in an earthy cocoon of a some- 

 what oval shape, and of a length of 7—8 mm. The larva (which I 

 have not examined) was found in moss on ^/4, and the imago came 

 on 1^/5. 



