84 T. OKADA 



broad, broader below. Clypeus white, laterally black. Cheeks broad, white, about one-fourth 

 as broad as the greatest diameter of eye. Occiput yellowish brown, ventromedially black. 

 Anterior reclinate orbital very fine, equidistant from proclinate and from posterior reclinate, 

 slightly outside proclinate ; proclinate about two-thirds as long as posterior reclinate. Vibrissae 

 long ; second oral fine, two-fifths as long as vibrissa ; succeeding orals finer. Postverticals 

 moderate in size. 



Mesonotum and scutellum glossy grey-brown, unicolrous. Thoracic pleura pale yellowish 

 white. Two humerals, upper half as long as lowers. Acrostichal hairs in six rows. Anterior 

 dorsocentrals half as long as posteriors ; distance between anterior and posterior dorsocentrals 

 one-third distance between anterior pair. Anterior scutellars divergent, longer than posteriors, 

 which are nearer to each other than to anteriors. Sterno-index 0-4. Legs yellow, tibiae and 

 tarsi slightly fuscous ; all metatarsi subequal to next three segments together. Preapicals on 

 all legs ; apicals prominent on mid leg. Wings somewhat fuscous ; crossveins clouded ; costa 

 reaching i? 4 + 5 , strong bristles on costa relatively fine. ^? 4 + 5 and M distally somewhat convergent. 

 C-index about 2-7 ; 4.V-index about 2-1 ; 4C-index about i-i ; 5x-index about o-8 ; Ac-index 

 about 2-6. Ci-bristles two ; C3-fringe on basal three-tenths. Halteres yellowish brown. 

 Abdominal tergites yellowish-brown, glossy, each with a caudal black medially contiguous 

 cross band ; 3T nearly entirely black (thus the specific name) . 



Periphallic organs pale brown. Genital arch pubescent and setigerous, much narrowed 

 dorsally, gently projected at middle caudally, ventrally narrowing and rectangularly curved 

 caudally at tip. Clasper large, triangular, distally broadened, with a nearly straight row of 

 about twelve pointed black teeth, occupying almost entire distal margin. Anal plate separated 

 from genital arch, elliptical, pubescent and setigerous, with short hairs at ventral tip. Phallic 

 organs yellowish orange. Aedeagus short, thickly hairy, apically pointed, proximally much 

 broadened ; apodeme slender, straight, nearly twice as long as aedeagus. Anterior paramere 

 orange, hairy, slender. Posterior paramere absent? Ventral fragma quadrate, large, with 

 lateral arms conically projected ventrally, without median notch. PI = 0-5. p.f. = ABcDef 

 g HiKLMN. Egg-guide lobe orange-brown, well sclerotized, fusiform, with about thirteen 

 marginal and three large brownish discal teeth ; subterminal hair distinct. Basal isthmus 

 about one-fourth as long as lobe. 



Holotype $. East Nepal : between Sangu and Tamrang, mixed shrubs in deep 

 gorge, c. 5,200', x-xi.1961 (R.L.C.), BMNH. 



Allotype $. Same data as holotype {R.L.C.), BMNH. 



Paratypes : 1 <J, 1 $, Sangu, mixed vegetation by stream in gully, c. 6,200', 

 xi.1961-i.1962 ; 1 (J, 3 $, same data as holotype ; 1 ^, river banks below Tamrang 

 Bridge, c. 5,500', x-xi.1961 ; 1 $, between Sangu and Tamrang, mixed plants by 

 damp cliff in deep river gorge, c. 5,200', 22.xi.1961 (R.L.C.), BMNH. 



Somewhat resembles D. (S.) coei, in having broad front, minute anterior reclinate 

 orbitals, broad cheeks, hairy aedeagus, and hairy anterior paramere, but differs 

 from it in having paler body, white face, unicolorous mesonotum, clouded wings, 

 and clouded crossveins. It differs also in the details of genital organs. 



Drosophila (Sophophora) serriflabella sp. n. 



(Text-figs. 238-243) 



$, $. Body about 2-5 mm. Head as broad as thorax. Eyes deep purplish red, fusiform at 

 lateral aspect, relatively small, pilose. Antennae with second segment dark yellowish orange ; 

 third greyish brown, oval, as broad as long, basally paler. Arista with about five dorsal and 

 three ventral branches and a small terminal fork. Palpus narrow, yellowish brown, with a 



