298 DIPTERA 
IO. GeNUS HALSANALOTES, BECKER 
Halsanalotes, Becker, Mitteil. Zool. Mus. Berlin, Vol. 2, p. 41 (1902); Bezzi, Ann. Mus. Hungar. 
Vol. 2, p. 321 (1904); Kertész, Cat. Dipt. Vol. 6, p. 143 (1909); Melander, Psyche, Vol. 17, 
P. 49 (1910); Bezzi, Ann. Mus. Hungar. Vol. 1o, p. 453 (1912). 
Characters. — Head globular, the occiput flattened-hemispherical, eyes pubescent, widely 
separated on the front and face, cheeks one-fourth the eye-height, face slightly convex: two pairs of 
vertical bristles, one of ocellar and one of diverging preocellar; antennze rather widely separated, very 
short, the outer joint triangular, pubescent, with a long hairy dorsal arista; proboscis very short, vertical, 
palpi oval, with small apical bristle. Thorax not broader than the abdomen, pollinose, with short 
pubescence but no discal bristles, two scutellar, one humeral, one notopleural and one supraalar bristle. 
Abdomen opaque pollinose, comprising five segments and the hypopygium which is terminal, blunt and 
provided with several lamellze and a short, erect, dorsal appendage. Legs short, not thickened, simple. 
front tibie with two apical bristles, middle tibi: with one apical, hind tibiz with a row of four or five 
extensor bristles on the apical half, last tarsal joint widened. Wings oval, basal cells equal, third and 
fourth veins diverging, anal cell weakly indicated, visible only when obliquely viewed. 
Genotype : H. amaurus, Becker, is the only species known. [It measures 0.5 to 0.75 mm. in 
length. Two species described by Bezzi as Halsanalotes are here placed in the new genus Micrempis. 
Geographical distribution. 
1. H. amaurus, Becker. Mitteil. Zool. Mus. Berlin, Vol. 2, p. 42, 64, pl. 4, N. Africa. 
f. 1-3 (1902). 
I1. GENUS MICREMPIS, NOv. GEN. 
Characters. — Very small, nearly shining, dark colored species with pale legs. Head 
spherical. the upper occiput a little flattened; front V-shaped, the eyes nearly meeting just above the 
antennze, a pair each of vertical, diverging ocellar and cruciate preocellar bristles, excision of the eye at 
the antennz angular and small, facets uniform, face more or less obliterated below the antenne, 
broadening toward the linear cheeks. Antenna short, two-jointed, the basal joint with a small or with 
no seta beneath, the outer joint round, compressed, with a dorsal prolongation forming the pedicel of 
the geniculate, pubescent arista. Proboscis short, vertical but a little inflexed, not thickened at the 
base, palpi broadly oval, with apical bristle, Thorax convex, broader than the head or abdomen, shining, 
no discal bristles, not pubescent, but with hairs in the dorsocentral and acrostichal rows, bare on the 
flattened area in front of the scutellum, humeral bristle present or absent, two notopleural, two scutellar, 
no postalar bristle; pleurze shining or more or less pollinose. Abdomen opaque, nearly bare, comprising 
seven segments and the hypopygium. Legs normal, rather short, front femora strongest, no bristles 
spines or spurs, the hairs inconspicuous. Wings with strong bristle at the base of the costa. second 
vein short, ending near the middle of the wing, basal cells small, equal, third and fourth veins diverging 
and with an anterior swing, no anal cell or veins. 
Type species : M. nana, nov. sp. 
setulze are short and more appressed ; and the dark color is concentrated about the thírd vein and the lower angle of the second 
basal cell, None of the veins of inchoata reach the hind margin of the wing. 
This species was found by the author in numbers on the seashore of Fossil Island of the Sucia Islands off the coast of 
Washington, July 16, 1909, an again on the dry sands about driftwood on the ocean beach at Long Beach, Washington, 
May to August, various years. 
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