FAM. EMPIDID/E 15 
with stiff hairs ; facets nearly uniform ; antenna porrect, the basal joints minute, together about one-third 
as long as the tapering third joint which ends in a thickened style three-fourths as long as the third joint ; 
palpi slender and setose, proboscis inflexed, not tapering. aslong as antenne. Thorax arched, about ten 
hairs in the dorsocentral series, one notopleural, two supra-alar and one intra-alar bristles developed, 
scutellum quadrisetose. | Seventh abdominal segment (female) long and tubular, apically fringed as in 
Blepharoprocta. Legs simple, middle femora with a few flexor setze, hind tibie with extensor sete. 
Wings hyaline, costa encompassing hind margin, auxiliary vein extending straight into costa, third vein 
not forked, discal cell emitting three posterior veins, basal cells long, the anal cell with rounded apex, 
the anal crossvein extending towards margin but with recurved tip, anal vein beyond crossvein, repre- 
sented by a fold, anal angle of wing shallowly rounded but evident. 
Genotype the following species. 
Geographical distribution. 
I. A. lacome, nov. sp. — Pl. 5, Fig. 38 (1). Washington. 
SuBFAMILY HYBOTINZE 
Characters, — Thorax greatly convex, head hemispherical, eyes large, bare, contiguous above 
the antennz at least in the male, so as to crowd out the front, the ocelli located on a prominent tubercle 
situated on the very summit of the head, upper facets larger than the lower, a distinct horizontal line 
extending across the eyes at the level of the antennz; proboscis porrect, usually styliform, short in the 
aberrant Tasmanian genera Iromomyia and Sciadocera, palpi never broad, sometimes linear and projec- 
ting, sometimes short; antenna small, three-jointed, but the basal joints immovably fused, no strong 
sete on the antennz, third joint more or less elongate oval, arista long, very thin and bare, usually 
terminal, rarely subdorsal, in Megkyferus sometimes replaced by a thick style; no cephalic bristles, a 
pair of small ocellar hairs. Humeri pronounced, disk of the mesonotum devoid of true bristles, some- 
times pilose, sometimes a prescutellar pair of reduced dorsocentrals, two or three notopleural bristles 
present, scutellum margined with hairs of which the apical two are sometimes bristle-like ; pleurze 
entirely devoid of hairs. Abdomen comprising eight segments and the pygidium or true ovipositor, the 
pygidium small and bilaterally constructed in the Syneches and Meghyferus groups, or usually larger and 
consisting of opposing upper and lower valves in the 77ybos group. Hind legs usually large, with their 
coxe the strongest pair, their femora incrassate and spinose beneath and longer than their tibiz; ante- 
rior tibiae and tarsi often furnished with long bristles, hind tibiae clavate in Meghyperus and. Syndyas ; 
pulvilli large, empodium minute and bristly. Calypteres rather large, separated from the root of the 
wing and densely fringed. Wings rather broad, the anal angle strongly developed, rectangular, costal 
margin hairy, costal bristle small, costa continuing to the fourth vein, humeral crossvein well formed, 
auxiliary vein straight, usually parallel with and close to the first vein and vanishing before it attains the 
costa, first vein ending beyond the middle of the wing, stigma usually more or less evident, sometimes 
prominent with the second vein curving down around it, discal cell usually large and elongate, situated 
(i) Anomalempis tacomse, nov. sp. — Female. Length 2.5 mm. Black species, occiput subshining, front 
and face brown pollinose, mouthparts and antenne black.  Mesonotum polished, its hairs black, pleure entirely dull 
pollinose, Abdomen polished, its fine hairs pale. Halteres pale yellow, calypteres and fringe sordid. Wings hyaline, 
only the faintest indication of a stigma, costal sections 1 : 1 : 0.6 : 0.8 (end of third vein a little beyong wing-tip) : 0.3: 0.4: 
0.4, underside of discal cell 3 : 2, sections of fifth vein equal. 
A single specimen of this curious fly was discovered during August 1917, in Paradise Park on Mt. Rainier, 
Washington. 
