132 U.S. NATIONAL MUSEUM BULLETIN 283 



with lengths from femur to V as 93-91-49-21-8-6-14; TR 2.3; 

 hind tibial comb with 9-10 spines (av. 9.7, n=8). Wing (fig. 96a) 

 darker than in propristyla; CR 0.74; r-m to stem M lengths as 1:3. 

 Abdomen (fig. 96o) as in propristyla, but on II-IV, the hairs are more 

 restricted to a narrow line down the midline and a row along the 

 posterior border of terga; I with 5-6 hairs on each side. Spermathecae 

 (fig. 96/) as in propristyla, but the large one more ovoid, the 2 func- 

 tional measuring 0.105 mm by 0.080 mm and 0.042 mm by 0.035 mm. 

 Genital sclerotization as in figure 9Qi. 



Male.' — Length of wing 1.56 mm. 



As in the female, with the usual sexual differences, including 

 features of the abdominal terga (fig. 9Qh). Genitalia (fig. 96c-e) 

 with basistyle bearing a short, simple basidorsal process, the posterior 

 accessory lobe merging into a broad platelike expansion on mesal 

 face of basistyle; dististyle more gradually tapered and curved from 

 base than in propristyla, the tip pointed; aedeagal sclerites slender, 

 slightly arched bars, the ventral membrane between them distinctly 

 spiculate nearly to their apices; parameres with stout basal lobe 

 bearing a lateral rather than a caudal process, main body simuate, 

 stout its entire length, with tip abruptly bent and bluntly pointed. 



Distribution.' — Japan; Korea. 



Types. • — Holotype female, Midoro Pond, Kyoto Prefecture, 

 Honshu, Japan, June 1955, P. H. Arnaud, light trap (USNM 69487). 

 Allotype male, Tokyo Japan, R. Thaxter collector (dep. Museum 

 Comparative Zoology, Cambridge, Mass.). Paratypes, 2 females. 

 JAPAN: Same data as allotype, 1 female. KOREA: Seoul, June 1955, 

 light trap, 1 female. 



Additional specimens. — JAPAN: Tokyo, R. Thaxter, 3 females 

 (pinned). Tsuruga, June 1923, T. D. A. Cockerell, 1 female (pinned). 

 KOREA: Seoul, June 1955, 1 female (pinned.) 



Discussion. ■ — The subapical pale banding of the hind femur, the 

 ovoid female spermatheca, and the differences in the male genitalia 

 noted above will distinguish this species from propristyla, to which 

 it is most closely related. 



We are very pleased to take this opportunity to dedicate this 

 species to Professor M. Tokunaga, distinguished Japanese Dipterist, 

 in appreciation of his outstanding contributions to our knowledge of 

 Pacific Ceratopogonidae. 



Sybleae Group 



Diagnostic characters (figs. 10, 99, of imparungulae) . — Small 

 to medium-size species, slender with hyaline wings, pale legs, more 

 or less dark-colored thorax and abdomen. Eyes narrowly separated 



