is DIPTERA 
discal cell relatively narrow, its basal. crossvein. weakened in | : 
Jront, no shgua . voe : co) cg crum d crie e EE 
3. Proboscis short, sometimes as loug as the jen. directed boron. 2 ; 
tally forward ; third joint of the antenne abruptly constricted, 
second joint selose ; female with one small. fronto-orbital ; two 
or more nolopleurals ; costa with a basal bristle, és usually 
dad. (PL T; Fig. 883). . . ... . Subgenus MicgoPHomus, Macquart. | 
Proboscis short, not protruding beyond the oral margin, stili 2e 
second. antennal joint not selose; female with two frouto-. 
orbitals; no basal bristle on the costa, no stigma. (Pl. T, 
FE.09L. . . |. —o -o. 5. . . Subgenus Scursrosrowa, Becker. 
4. Anal crossvein rounding, anal vein more or "s rudimentary, : 
anal angle poorly developed ; eyes. finely. pubescent ; face not ; 
broadened below, with only two oral hairs; tto scutellars... Genus MtcRoPHORELLA, Becker. | 
Anal crossvein perpendicular, base of the anal veiu strong, anal 
angle distinct ; eyes densely hairy; face very narrow. beneath 
the antenne, broadened below, more or less hairy; hairs of the 
abdomen coarse ; ; four or six scutellars Au - . Genus PamaTHALassIUS, Mik. 
5. Proboscis direcled horizontally or obliquely forward, siler short 
or long, palpi forrect ; eyes of the male contiguous above the 
antenne, the upper facets largest; face broad, arched. aud 
receding from. directly beneath the antenna, the oral margin 
therefore widely arched, facial orbits distinct; auxiliary vein 
complete, ending in the costa, anal angle strongly rectangular, 
wilh an axillar excision, costa usually thin on the hind 
margin ; bristles of the body well developed. — . (iw. iN qula 
Proboscis long aud thich, directed obliquely forward, palbi incum- 
bent ; eyes widely separated, facets uniform; antenne inserted 
low, the face short but vaulted, facial orbits not differentiated, 
third antennal. joiut large and. oval, without. arista or style; 
auxiliary vein incomplete at tip, third vein furcate, anal angle 
weak, no axilla, costa encompassing wing; bristles of body 
weah; hind. tibie geniculate; Clinocera-like flies. (Pl. 2, 
Fig.10). . . |. E ded . Genus BROCHELLA, nov. gen. 
Proboscis vertical or somewhat riii. » sometimes slightly PENUE 
ing, in which case the relatively narrow and lengthened face 
is characteristic; face not immediately. receding but. flat or 
convex below the antenna; style shorter than the third antennal 
joint; bypuditum usmaliy not ou, .,.—. . 0. o. o e os E EN 
6. Antenne apparently with only two joints, the outer. joint broadly 
orbicular ; anal crossvein not greally reflexed, the anal cell as 
broad as the second basal; tibie with several sets of bristles; 
pleure bare; fygidium globose, the. dorsal valves large, erect 
and simple, the lateral valves very convex and fosteriorly with 
two blunt prongs. (PI. 8B, Fig. 76)... . . . Genus HonMoPEzA, Zetterstedt. 
Antenne. distinclly three-jointed, the last joint more or. less 2». 
e 
* 
gale, uever. orbicular ; anal crossvein abruplly veflexed, the 
