46 DIPTERA 
Characters. — Thorax very strongly convex, subopaque, eyes separated on the face, arista 
often subdorsal, hind femora not setose, slender, no longer than their tibiz, middle tarsi of the male 
sometimes deformed, pygidium bilateral. Head hemispherical; proboscis horizontally porrect, as long 
as the head, slender and pointed, palpi small; eyes with a horizontal line through the middle, but the 
upper facets not abruptly enlarged. Thorax without bristles except laterally, scutellum with several 
fine marginal hairs but no bristles; abdomen of the male somewhat upturned at the end, of the female . 
tapering. Legs slender, often bearing curious bunches of hairs in the male sex, no extremely long 
tibial seta» such as in Syneches, underside of the hind femora completely unarmed, middle tarsi of male 
often shortened and distorted. Wings not large, stigma weak or absent, first posterior cell narrower in 
the margin than opposite the posterior crossvein, discal cell elongate, no alula. 
Type of the genus : P. iridipennis Kertész, the originalspecies. The genus Parahybos includes 
Oriental species only. For a time it was considered as a very close relative of Acarterus, the latter name 
being used for those species with subdorsal arista, As the recent discovery of additional species showed 
that this character was too elusive to use, the name Parahybos was dropped. However, as explained 
under the genus A«carterus, it seems that there has been a misconception of the African genus, and in 
the present paper all the Oriental species are grouped together under the name Parahkybos, 
Geographical distribution. 
1. P. chatofroclus, Bezzi, Ann. Mus. Hungar, Vol. 5, p. 565(1907), Vol. ro, Formosa. 
p- 458, 463, f. 1 (1912), Suppl. Ent. Berlin, Vol. 3, p. 68 (1914). 
2. P. chiragra, Bezzi, Ann. Mus. Hungar, Vol. 10, p. 458, 463, f. 2 (1912), Formosa 
Suppl. Ent. Berlin, Vol. 3, p. 68 (1914). — PI. fI, Fig. 7. 
3. P. flavipes, Brunetti, Rec. Indian Mus. Vol. 9, p. 21 (1913); Fauna Brit. India. 
Ind. Dipt. Vol. r, p. 343 (1920). 
4. P. fuscibennis, Brunetti, Rec. Indian Mus. Vol, 9, p. 21 [1913] (A4carterus); Ceylon. 
Fauna Brit. Ind. Dipt. Vol. r, p. 335, pl. 4, f. 5[1920] (Acarterus). 
5. P. incertus, Bezzi, Ann. Mus, Hungar, Vol. 10, p. 458 (1912). Formosa. 
6. P. infuscatus, Meijere, Tijdschr. v. Entom. Vol. 54, p. 326 (1911), Vol. 56, Java. 
Suppl. 71 (1914). 
7. P. iridipennis, Kertesz, Termes. Fuzet, Vol. 22, p. 176 (1899); Wulp, New Guinea. 
Tijdschr. v. Ent. Vol. 42, p. 49 (1899); Bezzi, Ann. Mus. Hungar, 
Vol. 2, p. 336 (1904), Vol. 10, p. 457 (1912); Collin, Ent. Mo. Mag. 
699, p. 186 (1922). 
8. P. luteicornis, Frey, Oefv. Finska Vet. Soc. Helsingfors, Vol. 59, A, Ceylon. 
n? 20, p. 6 (1917). 
9. P. meas, Bezzi, Ann. Mus. Hungar, Vol. 10, p. 458, 461 (1912). Formosa. 
10. P. orientalis, Meijere, Tijdschr. v. Ent. Vol. 5o, p. 250, pl. 6, f. 17[1907] java. 
(Acarterus); Bezzi, Ann. Mus. Hungar, Vol. 10, p. 456, 458 (1912); 
Meijere, Tijdschr. v. Ent. Vol. 56, Suppl. 71 (1914). 
tur. P. ornatipes, Meijere, Tijdschr. v. Ent. Vol. 56, Suppl.69, pl. 2. f. 8(1914). Java. 
12. P. pallijes, Bezzi, Ann. Mus. Hungar, Vol. 2, p. 335 [1994] (Acarterus), . India. 
Vol. 5, p. 566, note (1907); Meijere, Tijdschr. v. Ent. Vol. 5o, p 251 
[1907] (Acarterus), Vol. 54, p. 328 (1911); Bezzi, Ann. Mus. Hun- 
gar, Vol. ro, p. 458 (1912); Brunetti, Fauna Brit. Ind. Vol. r, 
p. 335 [1920] (Acarterus). 
13. P. fusillus, Meijere, Tijdschr. v. Ent. Vol. 54, p. 327 (1911), Vol. 56, Java. 
Suppl. 71 (1914). 
14. P. Sauteri, Bezzi, Ann. Mus. Hungar, Vol. 10, p. 458, 464, f. 3(1912); Formosa. 
Suppl. Ent. Berlin, Vol. 3, p. 68, 69 (1914). 
15. P. simplicibes, Bezzi, Ann. Mus. Hungar, Vol. 10, p. 458, 462 (1912). Formosa. 
