36 ^—  DIPTERA 
N 
. L. hyalina, Bezzi, Nova Acta Akad. Naturf. Halle, Vol. g1, p. 312 (1909). Peru. 
3. L. insolita, Melander, Trans. Amer. Ent. Soc. Vol. 28, p. 251, pl. 7, f. 82 Brazil. 
(1902); Bezzi, Nova Acta Akad. Naturf. Halle, Vol. gr, p. 311(1909). 
4. L. ficea, Wiedemann, Aussereurop. Zweifl. Ins. Pt. 2, p. 647[1830] (H»hos); Brazil. 
Bezzi, Nova Acta Akad. Naturf. Halle, Vol. 9r, p. 3o5[1909] (Hos). : 
. L. folita, nov. sp. i1). Luzon. 
. L. serrata, Bezzi, Nova Acta Akad. Naturf. Halle, Vol. 91, p. 312 (1909). . Peru. 
Q^ tn 
6. GENus CERATHYBOS, BEZZI 
GCerathybos, Bezzi, Nova Acta Akad. Naturf. Halle, Vol. 91, p. 3or, 303 (1909). 
Characters. — Polished metallic black species of 5.5 millimeters length. closely related to Hybos 
but the third joint of the antennze is very much dilated, semicircular, the convex side above. Head very 
small and with an evident neck, ocellar tubercle small; eyes contiguous on the face (Q) as well as on 
the front, the facets large and larger above; arista slender and long; proboscis perpendicular in the only 
known specimen, as long as the head, palpi small. Thorax rather convex, with short pubescence and 
with lateral bristles only, scutellum with four marginal bristles; ovipositor present, Anterior legs with 
long bristles, hind femora incrassate, spinose but not tuberculate beneath ; front tibie with a strong tooth 
inside nearthe knee, hind tibiz shorter than their femora, somewhat bent. Wings short and rather broad, 
no evident stigma, costa with abundant short hairs, pedicel of the second and third veins arising near the 
middle of the wing, fourth vein convergent with the third. Halteres black. 
Type species : C. Schuusei, Bezzi, from South America. 
Geographical distribution. 
t. C. Schuusei, Bezzi, Nova Acta Akad. Naturf. Halle, Vol. gt, p. 303, f. 1 Peru. 
(1909). 
7T. GENUS SYNDYAS, LoeEw 
Syndyas, Loew, Oefv. Vet. Akad. Fórh. Vol. 14, p. 369 (1857); Dipterenf. Südafr. p. 260, 332 (1860); 
Bigot, Ann. Soc. Ent. France (6), Vol. 9, p. 115 (1889); Coquillett, Proc. U. S. Nat. Mus. Vol. 18, 
p. 390 (1895); Williston, Man. N. Amer. Dipt. p. 74 (1896); Melander, Trans. Amer. Ent. Soc. 
Vol. 28, p. 254 (1902); Coquillett, Proc. Ent. Soc. Wash. Vol. 5, p. 257, 259 (1903); Bezzi, Ann. 
(1) Lactistomyia polita, nov sp — Female. Length4mm Head globose, eyes contiguous above and below 
the antennae, divided exactly into four quadrants by the horizontal line; antenne black, the third joint elongate oval, 
nearly two tim s long as wide, arista filiform, terminal, three times antennal length; mouthparts black, projecting straight 
forward beyond base of antennze, palpi linear, appressed ; occiput lightly coated with fulvous pollen. Body black, polished, 
the rear of the thorax and the pleurze brown-pollinose, notal hairs scattered and black, no dorsocentral bristles, | Abdomi- 
nal hairs straggling. long and pale, the integument with bronze lustre, ovipositor long and flattened, styles elongate, the 
last two segments of the abdomen with the styles as long as segments two and three together. Legs black, the pulvilli and 
base of claws brownish, all joints more or less furnished with black hair, middle tibi; and anterior tarsi with a few out- 
standing thin setze, hind femora at middle as thick as their coxze, their under face bearing 15 small tubercles each provided 
with a stout spine, middle tibize stout, two-thirds as long and nearly as wide as their femora, hind metatarsi nearly as long 
as four following joints, bearing three stout spines on exterior face, of which two are near the base and one at the apex. 
Halteres black. Wings lightly infumated, stigma weakly indicated, filling outer half of marginal cell, veins dark, anal 
vein faint, first posterior cell coarctate. 
Holotype, Mt. Makling, Luzon, P. I., received from Prof. C. F. Baker. The species departs from the typical 
forms in the reduction of pollinosity and in the less deformed hind legs. 
