FAM. EMPIDID/E 27 
Hind tibie without external tubercle; wings dark at base. . . . . . . . . . . . n 
7. Femoral tubercle located at three-fifths the length and 
beyond middle of hind tibie& which are uniformly 
DESONB C IINE UOI IIT IE Sur Cit sun ui Eu COQUILLETTEI, nov, sp. (1). 
Femoral tubercle located toward the knee, hind tibiz paler 
inemddle 0120 c. Aa Rhe. tentes Eu DENTIPES, .Wiedemann. 
8. Hind metatarsi with several pronounced spinous bristles 
HIOnP ontenderoredees o END AM DQLI US D icd cere qiva 9. 
T:arspuOP DIOVIGEd WIDE SDIMOHSIDIIBHSS 1. S UADLIAU Qu r2 e UI P T o. 13. 
9 Anterior legs entirely black, with black bristles, hind legs 
black or at most their metatarsi yellow, hind metatarsi 
with two or three spines; wings dusky toward base . . . . . . . . . . . . . 10. 
Tarsi yellow, their hairs and bristles in part pale, pulvilli 
yellowish, hind metatarsi with four or five spines; apical 
cogo renncleidere cu TC bl dde MN dE MM UM TUN 14; 
1o. Terminal filament spatulate, abruptly tapering at apex, 
middle prong of left or lower valve projecting ; spines of 
inngumettasrprespubundemale alsors339 13 2 1i Qo e eor cuo Ii. 
as wide, arista three times antennallength. Notum polished, with faint violaceous tinge, very lightly dusted above wings 
and in back, hairs scattered, pale in front, black behind, apical scutellars developed, no dorsocentrals; meso- and sterno- 
pleura polished, remainder gray-coated. Abdomen polished, faintly: violaceous, basal hairs long and whitish, genitalia 
short, lightly dusted, the right valve deeply excavated below and bearing a long flat process in the excavation. Coxe 
black, base of anterior femora fuscous, no excessively long sete, a small flexor spur near base of front tibia, four extensor 
bristles but no flexor bristle along middle tibiz, hind trochanters with spinous bristles, hind femora robust, with stout 
spinous bristles as follows : one preapical dorsal, four anterior, nine anterior-flexor, several ventral toward knee, five pos- 
terior-flexor on basal half, of which the third and fourth arise together from a strong tubercle, two posterior at two-thirds 
the length of the femur, the lower bristles mostly arising from small tubercles, hind tibiz gently arcuate, a strong tubercle 
at two-thirds length of outer side, two smaller preapical tubercles on inner side, pulvilli normal. Halteres wholly black. 
Wings nearly hyaline, veins blackish, stigma long, blackish, filling end of marginal cell, sections of costa 1 : 0.3 : 0.4 : 0.1, 
of fourth vein subequal, of fifth vein 1 : 0.25, third and fourth veins convergent. 
Female. Ovipositor slender; hind legs normal, bristles of hind femora reduced. 
Two specimens, La Suiza de Turrialba, Costa Rica, November, 1922, Pablo Schild, collector. 
(1) Euhybos Coquilletti, nov. sp. — Male and female. Length 4 mm. Body brownish black. "Third anten- 
nal joint three times as long as broad and nearly half as long as the arista; occipitalhairs blackish. Hairs of the mesonotum 
long, moderately abundant and yellow, scutellum with two strong and two weak bristles and about four additional marginal 
hairs ; notum and abdomen with slight purplish reflection ; seventh segment of the female abdomen rather globose, the base 
of the eighth trapezoidal and separated from the compressed apical part by a groove, the upper part of the apical portion 
bears an inverted Y-shaped thickening, the lower part becomes pale apically, the ninth segment long, slender, opaque 
and hairy; upper valve ofthe pygidium in profile longer than deep, polished on the outer half, not margined with long hairs, 
bifurcate apically the right fork long and slender, the left broadened obconically to cover the base of the lengthened, curved, 
loosely hairy, terminal filament. "Tarsi and anterior tibize testaceous, anterior femora brownish, posterior legs otherwise 
brownish black, middle tibize with about six extensor bristles and a long yellow preapical flexor bristle, middle metatarsi 
with two long brown bristles on the extensor side and a pair of shorter yellow bristles on the flexor side, hind trochanters C 
with a strong thorn beneath, hind femora robust, strongly spinose beneath, the spines growing from stubby tubercles, in 
the male a single strong tubercle tipped with two thorns located at three-fifths the length of the under-inner side, a strong 
subdorsal bristle before the hind knee, hind tibize (C conspicuously curved, the femoral tubercle coming beyond the middle. 
Halteres black. "Wings blackish to beyond the middle of the discal cell, costal cell convex in front, a little broader than the 
first basal. 
North Carolina. Type in the U. S. National Museum. This species was associated with specimens from North 
Carolina determined by Coquillett as Purpureus (Proc. Ent. Soc. Wash. Vol. 5, p. 264, 1903), The purpureus form differs in 
having aboutsix strong tubercles in the apical part of the hind femora c7, the pygidium relatively shorter with the upper 
valve almost globular and margined with hairs, and the pubescence of the mesonotum almost black. 
