110 LEPTIDJ. 



tibiae ; all tarsi black, with reddish-brown pubescence on underside 

 of hind pair; all legs with minute grey pubescence; two obvious 

 spines oil middle and hind tibiae, arid it is just possible that a small 

 one may be present on fore pair just .be fore the slightly narrowed 

 tips, though apparently it is absent. Wings pale grey, veins 

 dark brown ; halteres brownish yellow. 



Length, 10 mm. 



Described from a perfect unique $ in the Pusa collection from 

 Khasi Hills, 1000-3000 ft., iii. 1907. 



Type sent to British Museum. 



Subfamily CCENOMYIN^E. 



Head', antennal 3rd joint nagelliform and annulated, with sty li- 

 forui tip and no arista. Palpi long, thin, pointed, porrect, 2-jointed. 

 Eyes hairy or bare, contiguous in cf Thorax and abdomen 

 robust, shortly pubescent or bare ; meso- and metapleurae with 

 tufts of pubescence ; scutellum with two short blunt spines or 

 unarmed ; genitalia small. Legs comparatively short and strong ; 

 fore tibiae with one spur, posterior tibiae with two spurs. Basal 

 wing-cells long ; discal cell present ; two submarginal cells, the 

 2nd long, with bell-mouthed tip ; five posterior cells, 5th in broad 

 contact with discal cell. 



The CffixoMYis^E and XYLOPHAGIN^E are easily recognised by 

 the annulated 3rd antennal joint, and the latter are distinguishable 

 from the former by the four characters previously given in the 

 table of genera of LEPTIDJE. 



Only a few genera and species of CffiNOMYiN^E are known 

 throughout the world. 



Life-history. That of Ccenomyict ferruginea, Scop., a widely 

 distributed European and North -American species, is known. 

 The larva is amphipneustic, cylindrical, 12-segtnented ; the head 

 conical, brown, chitinized ; the rest of the body with chitinized 

 spots and bands. Pupa free. The species breeds in decaying 

 poplars and at the roots of trees, especially beeches ; the larvae are 

 carnivorous and voracious ; their total development may last over 

 a year. 



The adult insects are rather sluggish, frequenting woods. 



Genus CCENOMYIODES, gen. iiov. 



GENOTYPE, Ccenomyiodes edtvardsi, sp. nov. ;, the only species 

 known. 



Head comparatively small, narrower than thorax ; placed some- 

 what low down ; occiput flattened ; epistoma separated from 

 cheeks by an impressed hue ; eyes hairy, separated by moderately 

 broad frons in $ ( <$ unknown) ; antennae 3-jointed, the 3rd 

 flagellate, with eight annulations, ending in stylate form, arista 

 absent ; palpi long, thin, labella broad ; proboscis rather short. 



