FAM. EMPIDIDZE 3: 
Veins not delicate, first and second basal cells subequal; 
pygidial hairs iong, middle prong ofleft valve not ribbon- 
E o MUN MTM MM eM a m aes s m oe sd. 
3r. Excavation at upper inner middle of right valve narrow 
and tipped on its proximal corner with a spine-like 
process, inside conical prong distal to excavation. . .  E.scuirDr, nov. sp. (1). 
Excavation of right valve broad and not spined, inside 
conical prong arising from center ofexcavation. . . . E. prNoPUS, nov. sp. (2). 
32. Legs wholly black; wings pure hyaline. . . . . . . E.nvaroPrERvs, Bezzi. 
Ronmore on velgwed uude S s EIE v cede b umo I eie m s 25. 
33. Crossveins clouded with brown. . . . . . . . . . E.srIGMariCus, Schiner. 
CIR naNNOndsd us uM cu I c EIER M UE Uie Uu c. RI CAES SR LS 24- 
34. Hind femora strongly and abundantly spinose. . . . . E. rHRIXOTHRIX, nov. sp. (3). 
Hind femora less spinose, no spines on upper posterior 
EL IMEEM ISDEM TII S T EE 188. 
hind tibize flattened opposite femoral ridge, hind trochanters without spine. Wings narrow, no stigma, veins very thin, first 
basal cell about two-thirds as long as second, section of fifth vein 4: 1. Female. Ovipositor simple. 
Two specimens, Frontera, Tabasco, Mexico, March 29, C. H. T. Townsend, collector, holotype in U. S. National 
Museum. The structure of the hind legs indicates relationship with the purpureus group, but as the ridge of the tibiae and 
the depression of the femora are not prominent the species has been placed in the latter part of the key. 
(1) Euhybes Schildi, nov.sp. — Male. Length 3.5 mm. Black, the geniculation of the hind tibiz and the basal 
two joints of all tarsi brownish yellow, basal third of wings infumated, stigma obsolete. Third antennal joint ovate, a little 
less than twice as long as wide, arista two and one-half times antennal length ; occipital coating brownish gray. Notalhairs 
black and abundant, the sparse dust at sides and rear brownish, apical scutellars approximate, six setiform hairs on each 
side of scutellar margin. Abdominal hairs black, basal tergite pollinose, pygidium short, hairy apex contorted, left valve 
with strongly concave inner margin and terminated by a long slender finger-like process, right valve narrowly and deeply 
excised at the middle, the proximal corner of the excision tipped with a spine, the distal corner covering a stout tooth, 
terminal process of right valve undeveloped but a finger-like process extending from apex below. Six extensor sete on 
middle tibize, hind femora stout and strongly spinose, hairs black, seven irregularly placed spinous bristles on posterior face, 
no extensors or anterior bristles, eight stout spinous bristles in posterior flexor row, other flexors irregular, hin 1 tibia more 
strongly curved than usual, hind trochanters with a spine. Fourth vein deeply bent at posterior crossvein, sections of 
fifth vein 3.5 : 1. : 
Female. Hind femora slender, without the strong bristles on posterior face; ovipositor with deformed base, the 
seventh abdominal segment large, proximally fringzed with long thin black setze and transversely depressed across the middle 
and again before apex, the intervening portion bullate. 
Two males and five females, La Suiza de Turrialba, Costa Rica, Pablo Schild, collector. The paratype male has 
the hind tibiz less curved, as in the females. 
(2 Euhybos dinopus, nov.sp. — Male. Length 3.5mm, Black, abdomen with slight bronzed lustre, tarsi 
yellow, basal third of wings deep brown, remainder hyaline. Third antennal joint subulate, slightly over twice as long 
as wide, arista twice the antennal length ; occiput brownish-gray pollinose. Notal hairs blackish, four scutellars. Abdo- 
men short, hairs brown, pygidium longer than wide, greatly contorted, left valve terminated by the broad middle process, 
which is tipped with a spine, the apical projection articulate and long, right valve excavated along the inside and bearing a 
stout conical projection at the middle of the excavation, apically broadly expanding and notched for the reception of the 
termination of the opposing valve, below this notch continued as a spoon-shaped projection. Seriate bristles on outside of 
middle tibiz strong, hind femora robust, as long as tibia and metatarsus together, hairs black, seven strong bristles along 
lower part and four along middle of anterior face, three extensor bristles; pulvilli yellowish, claws reddish except black tip. 
Brown of wings ceasing at base of discal cell, no stigma, basal cells nearly coextensive, sections of fourth vein 4 : 1, fourth 
vein much bent at posterior crossvein. 
Holotype, Saa Rafael, Vera Cruz, Mexico, C. H. T. Towsend, collector, in U. S. National Museum. 
(3) Euhybos thrixothrix, nov. sp. —. Male. Length 4 mm. Occipital dust brown, hairs black, outer antennal 
joint ovate, twice as long as wide, arista two and one-half times antennal length. Thorax black, notum with slight blue lustre, 
pile blackish, the finely villous patches above wings brown. Abdomen black with slight bronze tinge, basal hairs long and 
whitish, pygidial hairs dark, terminal prong strong, obliquely truncate and crenulate at tip. Coxze, femora, hind tibiae and 
apex of tarsi black, anterior tibize and all tarsi brown, middle tibize with an extensor row of six setze, terminal and metatarsal 
setze long and brown ; hind femora robust, a little longer than the simple curved tibia and metatarsus combined, unusually 
