258 PROCEEDINGS OF THE NATIONAL IVTUSEUM vol. in 



characteristics of hrunneus and might have been determined as the 

 latter species except for the genitalia features. 



Specimens examined: 8 cf , 5 9. 



New Zealand: North Island: 4 d", 1 9 , Ohakune, Wellington, Dec. 25, 1919, 

 Jan. 10-15, 1920, March 1922 (T. R. Harris, USNM, EIS); 1 9, Silverstream, 

 Wellington, Dec. 3, 1936 (USNM); 1 cf, Eglinton Volcano, Dec. 31, 1920 

 (Fenwick, USNM); 1 cf, (topotype), Jan. 7, 1922 (Fenwick, USNM). South 

 Island: 2 &, 2 9 , Kumara, Westland, Dec. 14-15, 1929, Jan. 7, 1930 (J. W. 

 Campbell, USNM, EIS); 1 9, Greymouth, Westland (EIS). 



Ogcodes (Ogcodes) similis, new species 



Plate figuees 55, 87 



Species of group iv. 



Male: Length of entire specimen 4.50 mm., wing length 4.00 mm. 



Head dark brown except for black occiput, frons, and oral area; 

 ocellar tubercle small; frons narrow, no wider than ocellar tubercle, 

 flat, not protruding, grooved medially; antenna with segments i and 

 II appearing fused, iii only slightly swollen basally, long, thin, with 

 two short apical setae; mouth area oval, proboscial cover yellow. 



Thorax shining black, covered with reddish brown pile about as 

 long as antennal segment iii; legs slender, coxae black, femora dark 

 brown, remainder light brown; wing hyaline, veins light brown and 

 faint; vein M^ and crossvein m-cu present but faint, vein Cu^ does 

 not meet anal vein, stops just short of wing margin, venation similar 

 to that shown in plate 3, figure 8; squama delicate, base and narrow 

 rim brown, transparent but most of central area whitish, halter 

 stem brown, knob broken off. 



Abdomen dark brown except for narrow posterior white fasciae on 

 tergites ii-vi, somewhat larger fasciae on sternites iii-v, and white 

 pleural membrane; dorsum covered with short, sparse brown pile 

 with longer clumps of pile on medial area of tergites ii-iv and lateral 

 areas of iv-vi; venter covered with short, sparse brown pile except 

 for sternite i. 



Genitalia small, aedeagus narrowed and notched apically (pi. 9, 

 fig. 55); ejaculatory apodeme of medium build, directed anteriorly, 

 median plate about as wide as long in lateral view (pi. 12, fig. 87). 



Female: Unknown. 



Holotype: Male, New Zealand, 1928 (G. V. Hudson, BMNH, 

 1948-73). 



Remarks: This species is related to nitens, pygmaeus, and argigaster, 

 being perhaps most closely associated with the Tasmanian pygmaeus. 

 It is easily separated from these species by the structure of the male 

 genitaha (compare pi. 9, figs. 52, 53, 55, 58; pi. 12, figs. 87, 89, 90) and 

 the features given in the key above. 



