FLIES OF THE GENUS OGCODES — SCHLINGER 259 



Ogcodes {Ogcodes) leptisoma, new species 



Plate figures 61, 95 



Species of group iv. 



Male: Length of entire specimen 5.50 mm., wing length 4.50 mm. 



Head dark brown except black occiput; ocellar tubercle small, 

 hardly protruding, frons small, no wider than ocellar tubercle, flat, not 

 protruding, grooved medially; antenna with segments i and ii appear- 

 ing fused. III only slightly swoHen basally, very long and thin, with 

 two apical setae; mouth area oval, quite narrow. 



Thorax shining black, only pleura dark brown, entirely covered with 

 whitish yellow pile about as long as antennal segment iii ; legs slender, 

 especially tarsal segments, but apices of both hind femur and tibia 

 swollen, dark brown except femora and most of tibiae yellow; wing 

 evenly infuscated, veins dark brown, vein Mi and crossvein m-cu 

 present and distinct, anal vein joins Cu2 before hind wing margin, 

 though faint at junction; squama rugose, opaque, dark brown in- 

 fuscated, halter knob brown with white markings, stem light brown. 



Abdomen dark brown except for narrow, pale, yellowish brown 

 posterior fasciae on tergites i-vi, sternites ii-vi brownish yellow with 

 wide posterior fasciae on ii and iii, and pleural membrane white; 

 dorsum with short, silvery, nearly appressed pile on posterior two- 

 thirds of tergite i, all of ii, and small mesolateral area of iii; long, brown 

 pile present along lateral margin of all segments and large mesolateral 

 area of tergite v, short brown pile along midline of tergites ii and iii, 

 and most of iv; median area of v and all but margin of vi bare of pile 

 and shining; venter evenly covered with short yellowish brown pile 

 except for bare and shining sternite i; spiracles of segments ii-iv 

 appearing as brown spots in white membrane. 



Genitalia dark brown, small, aedeagus slender, nearly acuminate 

 (pi. 10, fig. 65); ejaculatory apodeme without definite median plate, 

 the whole apodemal structure minute with small spiculae below and 

 on wings (pi. 12, fig. 95). 



Female: Unknown. 



Holgtype: Male, Queenstown, Otago, South Island, New Zealand, 

 Dec. 12, 1922 (Leon Curtis, USNM 64438). 



Paratypes: 3 d', all New Zealand; 1 d', Glenorchy, Jan. 3, 1923 

 (F. S. Oliver, EIS); 2 cf, Wilton's Bush, Welhngton, Dec. 6, 1920 

 (G. V. Hudson, BMNH, 1923-323). 



The holotype's abdomen apparently was damaged somewhat during 

 its capture, so the characteristic shape of the abdomen is noted from 

 the paratypes as follows: In dorsal view, segments ii, in, and iv are 

 of equal length and width, and together make up about three-fourths 

 the length of the abdomen; in lateral view, the venter is shallowly 



