FAM. EMPIDIDZE 43 
(Hybos); Macquart, Hist. Nat. Dipt. Vol. r, p. 319 [1834] (Hybos) ; 
Scholz, Zeitschr. Ent. Breslau, Vol. 5 (17), p. 48 [1851] (Hybos); 
Schiner, Fauna Dipt. Aust Vol. r, p. 77 [1862] (Prerospilus); 
Neuhaus, Dipt. March. p. 68 [1886] (Pterospilus). 
asiliformis, Fabricius (not Bonelli), Ent. Syst.Vol. 4, p. 395 [1794] (Stomoxys) ; 
Syst. Antl. p 282 [1805] (Stomoxys). 
hybos, Lamarck, Hist, Nat. Anim, sans Vert, Vol. 3, p. 404 [1816] (Asilus). 
29. S. nalalensis, Bigot, Ann. Soc. Ent. France (6), Vol. 9, p. 126 [1889] S. Africa. 
(Pterospilus). 
3o. S. nebulosus, Loew, Oefv. Vet. Akad. Fórh. Vol. 14, p. 360 (1857); Dip- S. Africa. 
terenf. Südafr. Vol. 1, p. 259 (1860). 
31. S. obeliscus, Bezzi, Nova Acta Akad. Naturf. Halle, Vol. 9g1, p. 315 (1909). Bolivia, Peru. 
32. S. falliditarsis, Brunetti, Rec. Indian Mus. Vol. 9, p. 18 (1913); Fauna India. 
Brit. Ind. Dipt. Vol. t, p. 331, pl. 4, f. 4 (1920). 
33. S. feriscelis, nov. sp. (1). Luzon. 
34. S. bheoplerus, Bezzi, Ann. Mus. Hungar, Vol. 3, p. 427 (1905); Nova Peru. 
Acta Akad. Naturf. Halle, Vol. gt, p. 315 (1909). 
35. S. Phihia, Walker, List. Dipt. Brit. Mus. Vol. 3, p. 492 [1849] (G/oma). E. North America. 
— PI. l. Fig. 4. 
punctipennis, Van der Wulp, Tijdschr. Ent. Vol. 1o, p. 139, pl. 3, f. 18-21 (1867). 
simplex, Walker, Ins. Saunders. Dipt. Vol. r, p. 165, pl. 5, f. 7 (1852); Loew, 
Jenaische Zeitschr. Naturw. Jena, Vol. 36, p. 115 (1870); Wulp, Tijd- 
schr. v. Ent. Vol. 25, p. 119 (1882); Melander, Trans. Amer. Ent. Soc. 
Vol. 28, p. 254, f. 86 (1902). 
36. S. planiceps, nov. sp. (2). Costa Rica. 
37. S. Prestans, Bezzi, Ann. Mus. Hungar, Vol. 10, p. 457, 458 (1912). Formosa. 
38. S. pusillus, Loew, Berl. Ent. Zeitsch. Vol. 5, p. 320: Cent. i, No 25 North America. 
(1861); Williston, Trans. Ent. Soc. Lond. p. 308. pl. ::, f. 84 
(1896); Melander. Trans. Amer. Ent. Soc. Vol. 28, p. 253 (1902). 
39. S. byramidatus, Bezzi, Ann Mus. Hungar, Vol. 3, p. 428 (1905); Nova Peru. 
Acta Akad. Naturf. Halle, Vol. 9r, p. 315 (1909). 
(1) Syneches periscelis,nov.sp.— Male, Length3.8mm. Occiput black, cinereous below, the orbital fringe 
consisting of fine black hairs ; antenne yellow, the apical two-thirds of the small oval last joint brownish, the subterminal 
black arista four times the antennal length ; mouthparts testaceous. Mesonotum subshining, testaceous, an indication of 
a broad median vitta on forward portion, hairs and bristles black, scutellum with two bristles and ten marginal hairs; pleurze 
yellowish, shining, more or less brown on meso- and sternopleurz. Abdomen dull black, venter yellowish, hairs black, geni- 
talia small and closed. Front coxe brown, posterior coxe pale yellow, the remainder of legs testaceous with a black band 
encircling apical third of hind tibiae ; bristles and hairs concolorous with integument, middle tibize with a relatively small 
seta at basal third of outer side and another at apex; hind femora rather slender, not reaching to end of abdomen, with 
seven spines on outer inferior face of which only the distal threeare pronounced, the flexor face with six small thorn-bearing 
tubercles along the distal third, hind tibize simple, a little swollen on black portion ; tarsal claws with black tip, pulvilli 
yellowish. Halteres black, the root yellow. Wings lightly infumated, stigma obsolete, veins mainly blackish, marginal 
cell narrow, third and fourth veins parallel, discal cell small, anterior crossvein at its base, the first basal cell therefore 
shorter than the second, sections of fifth vein subequal, 
Holotype, Mt. Makling, Luzon, Philippine Islands, Prof. C. F. Baker, collector. 
(2) Syneches planiceps, nov. sp. — Female. Length4-4.5 mm. Black, the mouthparts, front tibiz, base ot 
hind tibiz, all tarsi and root of halteres yellowish ; thorax almost shining, the coating of golden pubescence sparse and 
not forming definite marks when viewed from different angles, abdomen polished , hairs and bristles of body fine, sparse and 
black, Bristles of front legs delicate and yellow, the strongest being at base of metatarsus, middle tibiee with two very long 
black bristles at basal two-fifths in addition to other moderately long irregular delicate bristles, hind femora elongate, 
with eight flexor bristles in anterior row, the last six arising from pronounced tubercles, the largest measuring half the 
width of the femur, hind metatarsi somewhat swollen. Wings hyaline, veins narrow and black, stigma oval almost filling end 
of marginal cell, black, marginal and submarginal cells of equal width, first posterior cell widest opposite stigma, its 
bounding veins slightly converging and then becoming parallel at tip of wing ; calypteres and fringe yellowish: 
Six specimens secured from Pablo Schild who collected them near Turrialba, Costa Rica, during April and July. 
Thetuberculate hind femora are suggestive of Harpamerus, but the distinct posterior dorsocentral bristles, the apical 
scutellars, the very long setze of middletibize and the relatively slender hind femora and simple tibiz are as other species of 
Syneches, s. str. 
