BY G. H. HARDY. 59 



this long list mav be found to contain more than one. 

 species. 



The scutcllar spines of this species' are identical with 

 those of O. carinifacies, Macquart, and 0. sydneyen- 

 sis, Schiner, in the larger specimens, but smaller and dis- 

 tinctive spines are to be found in small specimens, and 

 these range in size to normal spines, making it impossible 

 to form specific differences on this character. 



Traces of a tibial ring, often met with in other species, 

 appear rare in 0. decipiens, Guerin, and no vain.' can be 

 placed on this or the face colouration for identification 

 purposes. 



Guerin's description of (). decipiens is typical of the 

 male descriln d 1 » v White as 0. amyris, Walker. There 

 can be littl doubt that it is correctly identified. 



0. regisgeorgii, Macquart, is di scribed from a mutilat- 

 ed specimen, and probably belongs here. 



0. subdentata, Macquart, probably belongs here, and 

 White's record for Tasmania c rtainly belongs here, but a 

 specimen with the black carina described by Macquart is 

 not known in any rec nt collection. 



0. rufifacies, Macquart, undoubtedly belongs here. 



0. marginella, Macquart, reads like that of 0. oper- 

 taiiea, White, and differs chiefly in the underside of the 

 abdoim n and the legs. The black face make- it somewhat 

 doubtful if the species is correctly placed here, but the 

 "Thorax with lighl green reflections and yellow pile" and 

 the "Si ut Hum with little spines" previ nt it being identi- 

 fied with any of the oth< r species known. 



(). annulipes, Macquart, is distinctive in the two 

 sexes, the male (like 0. marginella, Macquart) reads simi- 

 lar to White's 0. operfanea, and indeed may be identical 

 with it, but the femali is ref< .able to the form described 

 under the name 0. amyris, Walker, by myself in 1917. 



0. picea, Walker, apparently belongs here. "White 

 stated that the type in the British Museum is in too bad 

 a condition for determination. 



0. kerchweri, Jaennicke, and 0. pectoralis, Thomson, 

 vvere overlooked by White. Their di scriptions conform to 

 that of 0. decipiens, Guerin. 



