189«,] 177 



long setae ; halteres yellow ; abdomen briglit black, sub-cylindrical, with incurved 

 apex ; wings grey, with third and fourth long veins bent, but parallel ; legs black, 

 with tibiae and tarsi rufous ; tibice armed at the apices with several spines. 



Length, 3 — 4 mm. Rare. 

 This is the only British species that is typical of the restricted genus Clido- 

 gadra of Becker. 



Sp. 2. — C. OBscuRA, Fin. 



This species is aberrant ; Becker places it among the Scatophagirue. It is grey, 

 and more or less covered with pale grey hairs ; the head is round ; frontal space 

 black behind and red in front ; antennae rather long, nearly reaching the epistome, 

 black, with grey or rufous base ; arista bare ; palpi small and pale, with some small 

 setae at the apices ; proboscis black and straight ; thorax grey, with two sub-dietinct 

 stripes ; scutellum grey, with four bristles ; abdomen grey, ciliated with pale hairs ; 

 wings light brown ; legs grey and hairy, but with few spines ; tibiae and tarsi 

 yellow. Length, 3 — 4 mm. Rare. 



Sp. 3. — C. TARSEA, Fin. 

 This little yellow fly is furnished with few hairs or bristles ; tlie head is round ; 

 the face short, and with frontalia yellow ; antennae short and black, with basal joints 

 yellow ; arista sub-nude ; proboscis yellow, with black lobes ; oral set» two only ; 

 palpi filiform, white, without apical setae ; scutellum with four bristles ; thorax and 

 abdomen bright reddish-yellow, the latter rather short and narrow in the male with 

 small hypopygium, and lanceolate and pointed in the female ; wings clear ; legs 

 yellow, with black tarsi. Length, 4 mm. Not common, rather local. 



Sp. 4. — C. DORSATA, Ztt. 

 Very similar to the last species. Head yellow ; cheeks and chin covered with 

 white tomentum ; antennae with all joints pale ; arista slender, dai'k, with slightly 

 thickened base; oral setae of good size, and several in number; palpi and proboscis 

 yellow ; thoi'ax yellow, with two or four sub-distinct narrow stripes ; scutellum 

 black, with a central yellow stripe ; abdomen of male with dorsum black or grey, 

 and sides rufous ; wings with yellow veins ; legs bright yellow, witli tarsi slightly 

 grey. The female has the abdomen yellow. Length, 4 mm. Rare. 



I have only seen one male, which was captured by Mr. Dale at Glanvilles 

 Wootton. Becker places this, together with C. tarsea, Fin., in the sub-genus 

 Gimnornera, Rnd. 



Sp. 5. — C. VITTATA, Mgn. 

 This species closely resembles Cordylura albipes, and really ought to be placed 

 in the same genus ; the only point of distinction being that the arista is pubescent 

 instead of plumose. The head has the frontal space rather narrow, black behind 

 and yellow in front; antennae and palpi pale; proboscis yellow; thorax shining 

 black, with yellow sides ; abdomen bright black, sub-cylindrical and narrow in the 

 male, hairy with small apex; wings clear; legs yellow, with brown tarsi and black 

 points to the hind knees. The female has the abdomen lanceolate, and the third 

 antennal joint sometimes black. Length, 4 mm. Rare. 



(To he continued) . 



