110 LEPTIDyt. 



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

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

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

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

 tips, though apparently it is absent. Win(/s pale grey, veins 

 dark brown ; halteres brownish yellow. 



Lengtli, 10 mm. 



Described from a perfect unique $ in the Pusa collection from 

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



Type sent to British Museum. 



Subfamily CCKNOMYINtE. 



Head: antennal 3rd joint fiagelliforin and annulated, with styli- 

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

 Eyes hairy or bare, contiguous in cJ . Thorax and abdomeu 

 robust, shortly pubescent or bare ; meso- and metapleurie witli 

 tufts of pubescence; scutellum with two short blunt spines or 

 unarmed ; genitalia small. Legs comparatively sliort and strong ; 

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

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

 2nd long, v\ith bell-mouthed tip ; five posterior cells, 5tli in broad 

 contact with discal cell. 



The CoixOMYiXyi; and XYLorUAGiiSyK are easily recognised l)y 

 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 Leptid.e. 



Only a few genera and species of Ccenomyin.e are known 

 thi'oughout the world. 



Life-hiatorii . That of Cainomyui. ferruyinea, !Sco])., a widely 

 distributed European and North -American species, is known. 

 The lar\a is amphipneustic, cylindrical, 12-segmented ; the head 

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

 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 ratlier sluggish, frequenting woods. 



(lenus C(ENOMYIODES, gen. nov. 



Genotype, C\eiiomyiodes edwardsi, sp. nov. : the onlv species 

 known. 



//eac^ coujparatively small, narrower than thorax; placed some- 

 what low down ; occiput flattened ; ej)istoina se|)arated from 

 cheeks by an impressed line ; eyes haii'y, separated by moderatelv 

 broad frons in 5 ( c5' unknown); autennao 3-join!cd, the 3rd 

 flagellate, with eight annulation.s. ( nding in stylate form, arista 

 absent ; palpi long, thin, labella broad ; proboscis i-aiher short. 



