42 DIPTERA 
14. S. elevatus, Bezzi, Ann. Soc. Ent. Belg. Vol. 52, p. 380 (1908). Congo. 
15. S. fratellus, Brunetti, Rec. Indian Mus. Vol. 9, p. 18(1913); Fauna Brit, W. Himalayas. 
Ind. Dipt. Vol. r, p. 332 (1920). 
16. S. fuliginosus, Meijere, Tijdschr. v. Ent. Vol. 58, p. 24 (1915). Simalur. 
17. S. fuscescens, Bezzi, Nova Acta Akad. Naturf. Halle, Vol.91, p. 319 (1909). Bolivia. 
18. S. fuscifennis, Brunetti, Fauna Brit. India, Vol. r, p. 333 (1920). India. 
19. S. hyalinus, Coquillett, Proc. U. S. Nat. Mus. Vol. 18, p. 437 (1895); E. United States. 
Melander, Trans. Amer. Ent. Soc. Vol. 28, p. 252 (1902). 
20. S. immaculatus, Brunetti, Rec. Indian Mus. Vol. 9, p. 18 (1913); Fauna Ceylon. 
Brit. Ind. Dipt. Vol. r, p. 328, f. 24 (1920). 
21. S. inzqualis, Brunetti, Rec. Indian Mus. Vol. 9, p. 19 (1913); Fauna India. 
Brit. Ind. Dipt. Vol. r, p. 33o (1920). 
22. S. insignis, Brunetti, Rec. Indian Mus. Vol. 9, p. 19 (1913); Fauna Brit. W. Himalayas. 
Ind. Dipt. Vol. rz, p. 332, f. 25 (1920). . 
23. S. lividus, nov. sp. (1). Luzon. . 
24. S. longipeunis, Melander, Trans. Amer. Ent. Soc. Vol. 28, p. 346 (1902). North Carolina. 
25. S. longiventris, nov. sp. (2). Costa Rica. 
26. S. luteus, Wiedemann, Aussereurop. Zweifl. Ins. Pt. 2, p. 647 [1830] Brazil. 
(Hybos) ; Bezzi, Nova Acta Akad. Naturf. Halle, Vol. 91. p.314 (1909). 
27. S. minutus, Brunetti, Rec. Indian Mus. Vol. 9, p. 20 (1913); Fauna Burma. 
Brit. Ind. Dipt. Vol. 1, p. 330 (1920). 
28. S. muscarius, Fabricius, Ent. Syst. Vol. 4, p. 390 [1794] (4silus); Meigen, S. & C. Europe. 
'Classif. Beschr. Eur. Zweifl. Ins. Vol. 1, p. 271 [1804] (Asilus); 
Coquebert, Illustr. Icon. Ins. p. 114, pl. 25, f. 12 [1804] (Asilus) ; 
Fabricius, Syst. Antl. p. 15r, [1805] (Dioctria); Latreille, Gen. 
Crust. Ins. Vol. 4, p. 3o5 (1809); Consid. Gén. p. 443 [1810] 
(Hybos); Meigen, Syst. Besch. Vol. 2, p. 264, pl. 21, f. 21 [1820] 
spot below end of first vein, apex of marginal cell with more or less evident secondary stigmal mark, submarginal cell 
slightly narrower than marginal at stigma, third and fourth veins apically parallel. 
Female, Facets slightly smaller, styles small and black, wings subhyaline, the stigmal spots as in male. 
Two males and two females, La Suiza de Turrialba, Costa Rica, April-July, collector Pablo Schild ; in Melander 
collection. n 
(1) Syneches lividus, nov.sp. — Male. Length4.5 mm. Almost wholly black, the anterior femora and tarsi, root 
of wings and of halteres, pleural sutures, postalar callosities and tip of proboscis brownish. Third antennal joint oval, 
nearly two times long as wide, the subterminal arista three times antennal length ; sides and lower part of occiput brown- 
dusted. Two fine dorsocentrals and two scutellars, about ten minute marginal hairs ; mesonotum very finely dusted, 
subshining. Abdomen long and slender, its hairs pale, becoming blackish at apex, genitalia small. Hind femora slender, 
only a little thicker than theirstraight tibiz, underneath with seven moderate bristles, and towards the apex with four 
thorn-bearing flexor denticles, the usual single seta of front tibiz long and the three setze of the middle tibize moderate ; 
pulvilli yellowish, tips of claws black, Wings lightly infumated, darker at tip, stigma distinct, elongate oval, filling the 
end of the marginal cell beyond the first vein, marginal and submarginal cells of equal width, third and fourth veins gently 
converging, discal cell moderate, posterior crossvein opposite end of first vein, sections of fifth vein 1 : 0.7. 
Three specimens, Mt, Makling, Luzon, Philippine Islands, C. F. Baker, collector. 
(2) Syneches longiventris, nov. sp. — Male. Length 4.2 mm, Shining black with almost entirely black legs, 
dusky wings, black stigina and elongate abdomen. Antennz black, outer joint orbicular, the arista sub-apical, palpi and 
proboscis testaceous, Thorax not excessively convex, declivous but not linearly impressed posteriorly, the dorsum with 
inconspicuous fulvous pile, scutellum with two strong and eight weaker bristles. Legs slender,the hind femora not greatly 
thickened, black pilose, the anterior knees, basal fifth of hind tibizm, apical half of anterior tibie and the anterior 
tarsi brownish yellow, remainder of legs shining black, hind femora loosely seriately bristly within, on flexor 
surface with four long bristles and with two preapical thorns, middle tibiz with two very long bristles attached at proxima] 
third, as in díchetophorus and repletus, each as long as the tibiae, and with additional long bristles at middle and at apex, 
fronttibiz swollen at basal two-fifths, Abdomen slender, three times as long as the thorax, with loose long black hairs, 
continuing on the venter to the small pygidium,  Halteres black, calypteres blackish and with black hairs. "Wings smoky, 
veins firm and black, stigma large, filling tip of marginal cell and sharply margined within, third and fourth veins parallel. 
Female. horns not differentiated before hind knees ; styles slender and black. 
One male and five females, La Suiza de Turrialba, Costa Rica, Pablo Schild collector ; in Melander collection, 
