72 THE DEPTERA-IiRACHYCEKA OF TASMANIA, 



wings Avith dark, strongly marked veins. Only a single 

 specimen is kuowu ; it Ayas taken hy Mr. G. H. Hardy, at 

 Hobart, on November 10, 1913. 



OPCODES ATER, Sp. IIOV. 



Thorax black ; abdomeu black witli hind margins of seg- 

 ments indistinctly brown; femora black ; tibise light yeilow- 

 bi'own ; vriugs hyaline with the veins faintly marked. 



Length. Male, 6 mm. 



Hab. Bridport. 



Male. Head consisting chiefly of the eyes. Face black. 

 Auteunse black with tlie arista brown. Thorax and scutellnm 

 black, covered with brownisli pubescence. Abdomen black, 

 with liind margins of segments narrowly and indistinctly 

 brown, the whole bearing short brown pubescence. Legs 

 with the femora, deej) shining black, the tibite and tarsi light 

 yellow-bi'own, the colouring of the femora and tibiae being 

 strongly contrasted, although the black of the femora 

 encroaches slightly on the tibise at the knees. Wings 

 hyaline, wilh the veins, except along the costal margin, 

 faintly marked. Scjuamte with blackened margins. 



This species may be distingviished from 0. Jiavescens by its 

 black instead of black and yellow colouration, from 0. 

 nujrinervis by its hyaline, faintly marked wings, and its yellow- 

 brown tibise and tarsi. 



The only specimen known of 0. aier was taken by Mr. F. 

 M. Littler, at Bridport, on October 30, 1913 ; it" occurred 

 flying close to the ground round the bases of low shrubs. 



Oncodes PYGMii;us, Sp. nov. 



A very small species. Thorax black ; abdomeu red-brown ; 

 femora and tibiae uniform light brown ; wings light brown. 



Length. Fen)ale, 3.75 mm. 



Hab. Launcestou. 



FoiKile. Head consisting chiefly of the eves. Antennse 

 black with the arista brown. Thorax and scutellnm sliining 

 black, covered with brown pubescence. Abdomen red-brown, 

 with short brown pubescence. Legs with the icmora, tibise, 

 and tarsi a uniform light l)rown. Wings tinted with bruwn, 

 veins brown. Squamae with Idackeued margins. 



This species may be distinguished from the other three 

 Tasmanian species by its small size, also from 0. flavi'scns 

 by the abdomen and legs having no trace of yellow, from 

 0. ni[/ri)iervis and 0. ater by the abdomeu bein<r red-brown 

 instead of black, and by the femora being light bri>wn 

 instead of black. 



The only specimen of this species at present known was 

 taken bv Mr. F. M. Littler, at Launcestou. 



