FAM. EMPIDID/E 299 
Geographical distribution. 
t. M. *eocenica, Meunier, Ann. Sc. Nat. (Zool.) Vol. 7, p. 89, 96, pl. 4, f. 3-5 Baltic Amber. 
[1908] (PAoneutisca). 
2. M. fuscipes, Bezzi, Ann. Mus. Hungar. Vol. 10, p. 490 [1912] (Halsanalotes). | Formosa. 
3. M. minuta, Melender, Trans. Amer. Ent. Soc. Vol. 28, p. 339 [1902) New Mexico. 
. (Stiüpon). 
4. M. nana, nov. sp. (1). — PL 4, Fig. 32. Texas. 
5. M. obliqua, nov. sp. (2). Iowa. 
6. M.selifrons, Bezzi, Ann. Mus. Hungar. Vol. 2, p. 357, 41 [19o4] Australia. 
(Halsanalotes). : 
7. M. *suspiciosa, Meunier, Ann. Sc. Nat. (Zool.) Vol. 7, p. 89, 98, pl. 4, Baltic Amber. 
f. 6. 7 [1908] (Phoneutisca). 
8. M. teslacea, nov. sp. (3). Virginia. 
9. M. varifes, nov. sp. (4). Peru. 
(1) Micrempis nana, nov. sp. (PI. 4, Fig. 32). — Male. Length o.6 mm, Dark brownish, legs yellow, the 
tarsi darker apically. ^ Vertex and lower occiput lightly cinereous pollinose; antennae brown, the outer joint compressed, 
circular, with four apical hairs and with a dorsal process (the pedicel of the arista), the arista then bent down, rather thickly 
pubescent. Proboscis and palpi yellowish. "Thorax very lightly dusted, nearly polished, not pubescent, one row of sparse 
dorsocentral hairs. Halteres black, with yellow stems. — Legs simple, not bristly, their pubescence inconspicuous. Wings 
subhyaline, veins brown, the second, third and fourth sections of the costa proportioned 1 : 4 : 1, crossveins meeting, sec- 
tions of thefifth vein proportioned r : 2. 
'Two specimens, Austin, Texas. 
(2 Micrempis obliqua, nov. sp. — Female. Length 1.3 mm, Occiput black, lightly dusted, front V-shaped, 
at the bottom scarcely one-half the diameter of the first antennal joint; face triangular, the eyes barely separated just 
beneath the antennze, cheeks narrow ; palpi whitish, not hairy, proboscis short, brown; antennz two jointed, without a seta 
beneath, the basal joint yellow, the outer joint blackish, sub-triangular, its upper edge straight, its lower edge rounded, one- 
fourth longer than broad, apically pubescent, the terminal àrista one-fourth longer than the antenna, microscopically pubes- 
cent; vertical bristles twice as long as the widely separated ocellars, brown.  Dorsum shining black, pleurz except the 
polished sterno-pleurze opaque gray pollinose, mesonotal hairs pale, regularly placed on the anterior two-thirds, posteriorly 
bare except for the three dorsocentrals, four rows of about seven acrostichals, the middle rows diverging behind, humeral 
bristle erect, two scutellars. Abdomen brown. Legs entirely yellow, only the middle femora with preapical bristle, no 
extensor bristles or apical spur on the hind tibize. Halteres brown, calypteres with four cilia. Wings clear hyaline, veins 
narrow brownish, the first four veins curving forward and diverging from each other, the third section of the costa two and 
one-half times as long as either the second or fourth section, submarginal cell apically large, at the tip of the first vein one- 
third as wide as the marginal cell and opposite the tip of the second vein more than twice as wide as the first posterior, this 
cell gradually widens to its apex, posterior crossvein strongly oblique, the lower apical angle of the second basal cell about 
fifty degrees, on the fourth vein the two basal cells of equal length, sections of the fifth vein equal. 
One specimen, submitted by Professor R. L. Webster, who found it at Ames, Iowa, July 16, 1908, attacking the apple 
leaf-hopper, Empoasca mali. 
(3) Micrempis testacea, nov. sp. — Female. Length 1.3 mm,  Testaceous, including the head, thorax, legs, 
antenna and mouthparts ; the abdomen and knob of the halteres brown. | Front broadly V-shaped, face linear; one pair each 
of strong vertical, ocellar and preocellar bristles; palpi ovate, with a single black seta, proboscis one-fourth the head-height ; 
outer antennal joint ovate, with subdorsal deflected arista alittleover twice the length of the antenna. Thorax round, rather 
shining, the disc seriately hairy, with the following moderate blackish bristles : one humeral, two notopleural, one supraalar, 
one postalar, one intraalar, and two scutellar; upper pleurz lightly pruinose, lower pleurz glistening ; abdomen opaque, 
ovipositor short, compressed, its blackish base shining. Wings with a slight yellowish tinge, the first four costal sections 
proportioned 1 : 0.5 : 0.9 : 0.7, the first four veins uniformly diverging and curving forward, the sections of the fourth vein 
proportioned 1 : 3, of the fifth vein, 1 : 1.3, crossveins meeting, cilia of the hind margin shorter than the anterior crossvein. 
"Type, Falls Church, Virginia, Nathan Banks, collector; Paratype, Plummer's Island, Maryland, H. Barber, collector, 
in U. S. National Museum. | 
(4) Micrempis varipes, nov. sp. — Length 1 mm. Body black, legs largely yellow, halteres black, wings clear 
hyaline, veins narrow and brown. Head lightly pollinose, more shining about the ocelli, front V-shaped, the sides curving 
inward, eyes subcontiguous below the antenna ; palpi and proboscis black, the latter one-half the height of the head ; anten- 
na black, the outer joint defective. Mesonotum polished, nearly bare, pleurz lightly pollinose, leaving'a circular central 
spot polished : abdomen subshining, pygidium small, ovipositor short and opaque. Anterior coxa yellow, the hind coxe 
black, front legs yellow, in the female the tarsi and a vague apical spot on the upper side of the femora infuscated, middle 
legs of the female blackish beyond the middle of the femora, of the male only the outer half of the femora darkened, hind legs 
