266 PROCEEDINGS OF THE NATIONAL MUSEUIM vol. in 



Ogcodes (Ogcodes) orientalis, new species 



Plate figures 20, 38, 112 



Species of group v. 



Male: Length of entire specimen 4.60 mm., wing length 3.88 mm. 



Head with e^^es, antenna, and oral region light brown, occiput and 

 frons dark brown; antenna with long slender style, about as long as 

 distitarsus, frons hardly swollen, oral area nearly V-shoped behind. 



Thorax covered with golden pile and dark brown except for light 

 brown to white narrow lateral margin of mesonotum, upper one- 

 half of postalar callus, a pair of prescutellar (mesonotal) spots, upper 

 one-half of metanotum, and large pleural area below wing base; legs 

 slender, yellow except for dark brown coxae, trochanters, knees, and 

 tarsal apices; hind femur longer than hind tibia, swollen distall}^ to 

 nearly twice the width at apex of trochanter; wing slightly browned, 

 vein Ml present, longer than R4+5, crossvein r-m nearly vertical, 

 crossvein m-cu a very faint crease, vein M2 short, curved and strong, 

 veins Cuo and anal well separated near hind margin (pi. 4, fig. 20), 

 squama semitransparent, light brown, narrow margin and basal 

 area dark brown; halter with dark brown knob, stem light brown. 



Abdomen with rather narrow posterior white fasciae on tergites, 

 dark brown except for large whitish brown mesolateral spots on 

 tergites 11 and iii; tergites 11 and in raised in middle to form slight 

 swellings; abdominal pile short, golden brown, more dense and 

 browner on swellings and sparse on tergites iv-vi; venter mosth^ 

 white, sternites i and narrow lateral and anterior margins of ii-vi 

 dark brown; entire venter slightly pilose. 



Genitalia dark brown, large, median plate about twice as long as 

 wide in lateral view, about 1.6 times "wingspread"; "wings" short, 

 pointed, basal cell incomplete, about twice as wide as high (pi. 13, 

 fig. 112); aedeagus with apex rounded and somewhat narrowed (pi. 7, 

 fig. 38). 



Female: Unknown. 



Holotype: Male, Angkor, Cambodia, Feb. 21, 1928 (W. P. 

 Cockerell, USxNM 64440). 



Remarks: This species represents the first record of the genus from 

 Indonesia. Its closest relatives appear to be respersus and jfhilip- 

 pinensis, but it differs from both in having tergites 11 and in swollen 

 in the middle and is distinguished from the latter by the male genitalia 

 (compare pi. 7, figs. 37 and 38, pi. 13, figs. 99 and 112). It also 

 differs from respersus in having the hind femur swollen instead of the 

 hind tibia. 



