BY authuh whitk. 93 



which have a black riiig,iiistea(i of beiiiii; entirely yellow. The 

 distinction is an unsatisfactoiy one, and it cannot be considered 

 as distinct until more evidence is fcjrthconiing. 



Odontomvia mahginella Macq. 



Face, front, and antennte black; abdomen black, with narrow, 

 green side-margins; femora lilack; tibia' yellow, with a black 

 ring. Length, 5 mm. 



llab. — " Tasmania." 



This species, which is unknown to me, should be distinguislied, 

 without difficulty, by its black femora. 



Odontomyia opertanea, sp.nov. 



Face in female entireh' black; antennte, front, thorax, and 

 scutellum entirely black; scutellum with two, very short, brown 

 spines; abdomen black, with narrow, yellow side-margins; legs 

 entirely yellow; wings with the cubital vein not forked. Length, 

 ^, 9 mm. 



Ildb. — Victoria (Healesville). 



Female. — Face projecting forwards, entirely black. Front 

 shining black, with a median furrow. Antennie about the length 

 of the head, black, first two joints of almost equal length, third 

 nearly twice the length of first and second together, and ter- 

 minated by a very short, blunt style. Thorax entirely black, 

 beneath as well as above; scutellum entirely black, with two, 

 very small, brown spines. Abdomen black, with narrow, yellow 

 side-margins; lower surface bright yellow. Legs entirely bright 

 yellow. Wings with the cubital vein short, and not forked; 

 anterior veins suffused with brown. 



This is the only known, Australian species of Odontomyia which 

 has the cubital vein unforked; it is also distinguished from all 

 the other, yellow-legged species by the wholly black scutellum, 

 and by the black face of the female. 



0. opertanea is known from only a single species, which was 

 taken at Healesville, Victoria, by Mr. J. Fiench, Junr., on -No 

 vember 7th, 1909. 



