196 Mr. F. Walker's Characters of undescrihed Diptera 



scutello pectoreque fulvis, abdomine rufescente-fulvo, vitta 

 nigra, maculis duabus dorsalibus trigonis cinereis, pedibus 

 fulvis, alis cinereis basi fulvis, alulis subcinereis fulvo-mar- 

 ginatis. 

 Male. — Black, very stout, with cinereous tomentum ; head 

 fawn colour above, whitish in front and beneath, with pale yellow- 

 ish hairs behind and beneath, somewhat tumid beneath ; frontalia 

 pale luteous, widening towards the antennae, bristles on each side 

 irregular ; facialia without bristles except towards the epistoma, 

 which is very prominent ; palpi whitish ; antennae reddish, short, 

 third joint very convex above, not longer than the second ; arista 

 black, stout, short ; thorax indistinctly striped, with numerous 

 long bristles on each side ; sides, scutellum and pectus tawny ; 

 abdomen reddish tawny, with a black stripe and with two dorsal 

 triangular cinereous spots, armed with black spines, which are 

 mostly towards the tip ; legs tawny ; wings grey, tawny at the 

 base ; veins black, tawny at the base and along the costa, prae- 

 brachial vein forming an acute angle at its flexure, near which it is 

 curved inward and is straight from thence to its tip, which joins 

 the costal at far in front of the tip of the wing ; discal transverse 

 vein straight, parted by less than its length from the border and 

 by little more than half its length from the flexure of the praebra- 

 chial ; alulae slightly greyish, with tawny borders. 

 Length of the body G lines ; of the wings 12 lines. 

 New South Wales. 



Genus Eurigaster, Macq. 



Eurigaster cuprescens, 



Fcem. — Nigra, lata, capite aurato, frontalibus atris, oculis pu- 

 bescentibus, palpis fulvis, antennis basi rufis, thorace vittis 

 quatuor scutelloque subcupreis, lateribus subaumtis, pectore 

 nigro-cinereo, abdomine brevi-obconico subcupreo, fasciis 

 nigris, alis cinereis basi et apud costam fuscescentibus, alulis 

 luridis. 



Female. — Black, broad ; head with pale gilded tomentum, 

 frontalia deep black, widening towards the antennae, with bristles 

 along each side ; facialia without bristles, except by the epis- 

 toma. which is slightly prominent ; eyes pubescent ; palpi short, 

 tawny ; antennae red towards the base, not reaching the epistoma ; 

 third joint linear, about four times the length of the second arista, 

 stout for one-fourth of the length, very much, longer than the 



