392 



UNITED STATES NATIONAL MUSEUM BULLETIN 22 4 



apart; the small but protuberant ocellarium bears a 

 pair of long, black, stout, lateral strongly divergent 

 bristles. The posterior ocelli are lateral in position. 

 Anterior eye facets strongly enlarged and the eye con- 

 siderably flattened anteriorly. 



Thorax : The mesonotum is moderately convex with 

 dense, subappressed, short pile across the whole meso- 

 notum. Humerus pilose; notopleuron with a single, 

 black bristle. Supraalar area with 1 black bristle. 

 Postalar region anteriorly with 2 yellow bristles ; scutel- 

 lum without bristles. Scutellar disc convex with ap- 

 pressed, yellow pile. Pleuron coarsely pubescent and 

 flat appressed. The pronotum has 6 to 8 moderately 

 stout, bristly hairs. Posterior border of the meta- 

 pleuron and the upper border with a few, fine, scattered 

 hairs. Hypopleuron with 7 or 8 moderately long, yel- 

 low hairs, and with long and short pubescence. Meta- 

 pleuron convex with a wide, irregular patch of rather 

 long stiff, yellow hairs or weak bristles. Slopes of the 

 metanotum bullose and with a conspicuous patch of 11 

 moderately short, yellow bristles. Postmetacoxal area 

 with a well developed cliitinized arch, in addition to 

 micropubescence. Prosternum not dissociated. 



Legs: The hind femur is distinctly though only 

 moderately thickened and is spindly at the base; the 

 apex is very slightly turned down, and the pile is 

 moderately abundant, subappressed, and rather fine. 

 There is a single quite weak, reddish bristle placed dor- 

 solateral^ at the outer fourth; otherwise there are no 

 true bristles present, but there are 4 or 5 long, stout, 

 pale, downward-thrust hairs placed ventromedially on 

 the basal half of the femur and quite abundant, rather 

 short, erect, pale hairs all along the ventral medial 

 surface. Hind tibia slightly and gradually widened 

 to the apex, with erect pile along its ventral margins 

 of the same length and color as on the femur and with- 

 out bristles, except for 2 rather weak, moderately long, 

 lateral, yellow bristles distal to the middle. At the 

 apex are weak, pale bristles, 2 laterally, 4 or 5 medially, 

 none dorsally. Middle femur with 2 rather well de- 

 veloped pale bristles anteriorly, 1 near the base, 1 at 

 the distal third, and along the ventral margin is a row 

 of long, bristly hairs. Middle tibia with 3 pale bristles 

 posteriorly, 2 long, dorsal elements, and 3 ventral 

 bristles, of which the bristle placed at the basal third is 

 extremely long. Anterior femur with 5 or 6 quite long, 

 ventral, bristly hairs placed on the basal half ; anterior 

 tibia with 2 weak bristles dorsally at the apex, a row 

 of 3 or 4 posteriorly and 4 ventrally in which the basal 

 bristle, like that of the middle tibia, is extremely long. 

 Claws small and sharp ; the pulvilli are f our-fifths the 

 length of the claw; empodium short, less than half as 

 long as the claw, swollen and bulbous at the base. 



Wings : The marginal cell is closed with an extremely 

 long stalk. Fourth posterior cell closed with a short 

 stalk. The ambient vein ends just behind the second 

 posterior cell ; the alula is small. 



Abdomen : The abdomen is distinctly spatulate, or 

 clavate and at its narrowest point at the end of the 

 second segment it is less than five-eighths the width 



of the fifth segment. The sixth and seventh segments 

 form almost an equilateral triangle but are strongly 

 arched and convex. The pile of the abdomen is rather 

 long, abundant, flat appressed with erect patches lat- 

 erally near the middles of the first three tergites; the 

 pile is especially long and copious on the sides of the 

 first segment, where it is weakly bristly and all the 

 pile is golden over the entire abdomen. There are no 

 bristles laterally on the tergites except on the sides of 

 the first segment where there is a row of 7 microtuber- 

 culate, yellow bristles. Sternal pile long, scanty, 

 subappressed and yellow. Male terminalia small, com- 

 pletely hidden by the cupped-over apex of the abdo- 

 men. Female terminalia small, short, protruding 

 beyond the seventh tergite as a small trapezoidal plate 

 which bears a medial, dorsal fissure. Eighth sternite 

 with a medial, concave, basally wide depression; each 

 outer position of the sternite is produced into a flat, 

 obtuse, stout, moderately long, convergent process 

 which is directed a little downward. 



Distribution: Neotropical: Protlchisma albibarbis 

 Curran (1930); longlmanus Hermann (1912). 



Genus Clariola Kertesz 



Figures 259, 270, 664, 1262, 1271, 1306, 1315, 1324, 1592, 2113 



Clariola Kertesz, Termeszetrajzi Fuzetek, vol. 24, p. 404, 1901. 

 Type of genus: Clariola pulchra Kertesz, 1901, by original 

 designation. 



Minute, slender and subcylindrical flies with elongate, 

 drooping, deeply punctured abdomen. The face is ex- 

 ceptionally narrow and in the middle it is less than a 

 sixteenth the head width. The vertex is divergent and 

 deeply excavated as in Anoplothyrea de Meijere but 

 the proboscis is not constricted and the third antennal 

 segment is longer, more slender, and is long pubescent. 

 Length 6 mm. 



Head, lateral aspect : Head of moderate length and 

 strongly convex in front; posteriorly beginning near 

 the middle, the profile is angularly recessive, leaving 

 the upper and lower halves each plane. The face is 

 visible in profile only as a minute protuberance at the 

 extreme lowest point. The proboscis is short, small, 

 and tapering to a blunt point ; it is gathered into a low, 

 thin ridge dorsally. On the apex of the proboscis are 

 numerous, rather long hairs. Palpus minute, cylindri- 

 cal, with 2 or 3 long bristles at the apex. The antenna 

 is unusually elongate and slender. The first segment 

 is more than twice as long as wide and the second 

 nearly twice as long as wide. The third is nearly twice 

 the combined length of the first two; near the apex it 

 is a little narrowed and bears long, distinctive pubes- 

 cence both above and below throughout its whole 

 length; dorsally in the middle it bears an incision with 

 spine. First segment ventrally with a quite long, 

 slender bristle in the middle of the segment. 



Head, anterior aspect : The face is extremely narrow 

 and less than a sixteenth the head width across the 

 middle of the face; it is slightly divergent below the 



