LArHEIINAB 



ROBBER FLIES OF THE WORLD 



327 



Legs: All the femora are stout, especially the an- 

 terior four. Hind femur slightly arcuate, thickened 

 towards the middle and the apex ; it bears rather short, 

 fine, suberect setae dorsally and these are quite dense 

 dorsomedially but finer, suberect and more scattered 

 laterally. On the ventral half of the lateral margin 

 and the whole of the ventral surface there is a dense 

 f ringe of quite long, fine, bristly hairs, the ends attenu- 

 ate and curled. Hind tibia with a similar, matching 

 fringe ventrally but the apex bears a dense, ventral 

 tuft of long pile; a brush of setae begins before the 

 middle but is found only on the medial surface. This 

 tibia has the following slender bristles : 3 or 4 dorsal on 

 the apical half; 3 stouter dorsolateral bristles in the 

 middle. Middle femur with 2 stout, posteroapical and 

 2 anterior bristles on the outer half and also anteriorly 

 and ventrally a fringe of abundant, long, fine, bristly 

 hairs. Middle tibia with exceptionally slender bristles : 

 4 dorsal, 5 or 6 posterodorsal and a long anterior and 

 posterior fringe, each containing some 15 long elements 

 and shorter ones. Anterior femur and tibia similar 

 with apical bristles absent on the femur and the tibial 

 fringe confined to a double or treble row posteriorly. 

 All basitarsi are moderately long but other tarsal seg- 

 ments beadlike. The tarsi end in large, spatidate pul- 

 villi, stout empodium, slender, sharp claws, bent 

 strongly at the apex. 



Wings : The marginal cell closed with a long stalk. 

 The anterior branch of the third vein ends a little above 

 the wing apex; the posterior branch ends far behind. 

 Fourth posterior cell closed with a long stalk. Anal 

 cell closed and stalked. Second basal cell closed, with 

 three veins. Alula large, ambient vein complete. 

 Wings often strongly tinged with brown or yellow. 



Abdomen: The abdomen is moderately robust and 

 rather elongate; it is slightly tapered on the apical half. 

 Abdomen with six well developed tergites in the male, 

 the seventh forms a narrow apical ring. Pile of abdo- 

 men dense, fine, suberect and moderately long and 

 longer on the sides of the tergites. First tergite with 3 

 or 4 moderately strong bristles; each of the remaining 

 tergites in the middle of the lateral margin bears 1 or 2 

 distinct, rather stout bristles, but none present on the 

 sixth tergite. Male terminalia large, conspicuous, ro- 

 tate about one-fourth to the right. End of gonopod 

 tends to be long and spatulate. 



Distribution: Oriental: Pagidolaphria alternans 

 Wiedemann (1828) ; annulifemur Enderlein (1914) ; 

 chappuisiana Enderlein (1914) ; chrysorhha Hermann 

 (1914); chrysonota Hermann (1914); chrysotelus 

 Walker (1855); constricta Walker (1855); dira 

 Walker (1855) ; egregia Wulp (1898) ; fiammipennis 

 Walker (1861); gigas Macquart (1838); horrida 

 Walker (1S55); reinwardtii Wiedemann (1828) 

 [ = apicata Walker (1849), fervens Walker (1855), 

 saeva Walker (1855)]; remota Hermann (1914) ; sig- 

 natipes Wulp (1872); walkeri Enderlein (1914). 



Australian: Pagidolaphria terminalis Wulp (1872). 



Genus Lampria Macquart 



Figuees 226, 612, 1237, 1246 



Lampria Macquart, Dipteres exotlques, vol. 1, pt. 2, p. 60, 1838. 

 Type of genus: Laphria clavipcs Fabrieius, 1805. Desig- 

 nated by Coquillett, 1910, the second of 2 species. 



Lampiia has 1 subgenus, Brychomyia, new subgenus. 



Small to medium size flies, separated from the more 

 bare and_ short pilose species of Laphria Meigen and 

 Bomhomima Enderlein by the setigerous tubercles of 

 the ventral surface on the hind femora. The species 

 commonly have the mesonotal pile dense, flat appressed, 

 with a matted appearance and sometimes brilliant gold 

 and green or purple coloration. The members of the 

 group appear to be somewhat diverse and ill assorted ; 

 the type of genus has very short, high, broad, greatly 

 flattened eyes with enormously enlarged facets. 

 Length 10 to 20 nun. 



Head, lateral aspect: The head is quite short and 

 high, the face moderately gibbous below, and slightly 

 gibbous beneath the antenna with the intervening area 

 concave. The occiput is short, a little more prominent 

 below, especially towards the middle of the head and 

 the eye is gradually and moderately recessive, begin- 

 ning at the upper fourth. The occipital pile is fine and 

 abundant ventrally, with slender bristles beginning at 

 the upper third. In other species the head is of at 

 least moderate length and relatively not as high and 

 may also have a double gibbosity. Proboscis as in 

 Laphria, elongate and strongly compressed laterally 

 with punctured, rounded apex and some pile above and 

 below. The base is not large but is a little swollen and 

 bears a dense, lateral tuft of long pile. Palpus clearly 

 of two segments, the second segment long, slender, cy- 

 lindrical, with apical and lateral pile. The antenna is 

 attached at the upper fifth of the head and is moder- 

 ately elongate, especially upon the third segment. 

 First 2 segments rather short and robust, the second 

 segment shorter. The third segment is gradually 

 widened to the outer fourth and then is gradually re- 

 duced to a blunt point, with a small dorsal pit and 

 spine. First segment especially with some long, 

 slender bristles and bristly hairs ventrally in the type 

 of genus but shorter in other species. 



Head, anterior aspect: The head is as wide as the 

 thorax. In the type of genus the eye is strongly flat- 

 tened anteriorly with greatly enlarged central facets; 

 it is more convex in other species. The face ranges 

 from about a sixth to a fourth the head width; it is 

 thinly pollinose or partly bare, the lateral pile scali- 

 form and flattened. Face with parallel sides. The 

 ventral gibbosity has 2 ventral rows of 7 or 8 very long, 

 sometimes wiry bristles extending nearly to the apex 

 of the long proboscis. Lower slope of the gibbosity 

 with considerable long, bristly pile, and similar pile 

 beneath the antenna. Subepistomal area large, deeply 

 concave and oblique. Front quite short, pollinose, with 

 a row of slender bristles along the eye margin, the ocel- 

 larium either small with steep sides or broad and low, 



