FLIES OF THE GENTJS OGCODES — SCHLINGER 255 



Ogcodes (Ogcodes) fortnumi Westwood 



Plate figures 57, 74, 84 



Ogcodes for tmnni Westwood, Trans. Ent. Soc. London, p. 516, 1876. 



Oncodes basalis, Plomley, in part, not figures, Rec. Queen Victoria Mus., vol. 2, 



pp. 17-22, 1947a; in part, Rec. Queen Victoria Mus., vol. 2, pp. 23-30, 



1947b (not Walker, 1852). 



Type locality: Adelaide, Australia (Hope Museum). 



Discussion: This species belongs in the colei group and is similar 

 to pygmaeus, described above; however, I am not certain as to the 

 identity of this species since the only specimens available for study 

 were from Tasmania, not Australia. They were determined as 

 Jortnumi by Paramonov, and formed part of the series reported on 

 by Plomley (1947a, 1947b). It should be noted that his specimens of 

 pygmaeus Wliite (as basalis) were collected on Feb. 6, 1936, while 

 those oi fortnumi were collected on Mar. 6, 1936, and thus they did 

 not necessarily represent one population. Although Plomley (1947a, 

 pp. 20-21) noted considerable variation in his large series of Upper 

 Blessington specimens, he followed Hardy (1918, 1940) and was 

 misled in assuming that his specimens were all basalis. Actually it 

 is very doubtful that basalis was represented in his series at all. 



On the basis of male genitalia there is little doubt tlia,t fotinumi is 

 closely related to pygmaeus White (see pi. 9, figs. 57-58). It is also 

 similar to nitens (Hutton), and has certain afFdiations with borealis 

 Cole and kuscheli Sabrosky (see pi. 9, figs. 52, 56-57, 59; pi. 11, fig. 

 79; pi. 12, figs. 84,88). 



Specimens examined: 2cf, 19. 



Australia: 1 cf , 19, Upper Blessington, Tasmania, Mar. 6, 1936 (N. J. B, 

 Plomley, SJP); Id^, Perth, Feb. 25 to Mar. 12, 1936 (R. E. Turner, BMNH). 



Ogcodes species of New Zealand subregion 



Key to the New Zealand species of genus Ogcodes * 



1. Vein Ml faintly present or only a crease; dorsum of abdomen with white mark- 



ings other than fasciae 2 



Vein Ml present, usually as dark as R4+5, sometimes clear, but always vein-like; 

 dorsum of abdomen without white markings except when fasciae are pres- 

 ent 3 



2. Entire abdomen white except for brown tergites i and vi, median spot on 11, 



and posterior margin of v; tibiae and tarsi mostly yellow or white. 



argigaster, new species 



' Females of (0.) argigasttr, (0.) leptisoma, (0.) similis, and (Protogcodes) paramonovi have not been ex- 

 amined. Females of (O.) brunneus and (O.) consimilis will probably key out together (see discussion under 

 brunneus) . 



Paramonov's (1955, p. 23) key to the Oncodes of New Zealand is misleading in several points and caution 

 should be exercised in using it. Only the males of consimilis will key out correctly. 



