542 



UNITED STATES NATIONAL MUSEUM BULLETIN 2 24 



similar dorsocentral row and a few other fine setae situ- 

 ated medial to tlie liimierus, the notopleuron and above 

 the wing. Prescutellar area with rather numerous, fine, 

 erect, stiff hairs. Postdorsocentral bristles strong and 

 begin at the wing level. Humerus with fine, erect pile. 

 Stout, long, lateral bristles are present and consist of 2 

 notopleural, 1 supraalar, 1 jDostalar, with sometimes 

 other weaker, postalar bristles, and no scutellar bristles. 

 Scutellmn thick, convex with distinct impressed rim; 

 surface pollinose with abundant, long, erect, stiff hairs 

 on each side. Propleuron with fine, scanty pile; the 

 pronotum bears 2 pairs of weak bristles. Mesopleuron, 

 upper sternopleuron, pteropleuron and posthypopleuron 

 each with a few, long, erect hairs. Metapleuron with a 

 wide band of long, weak bristles. Metanotum high, 

 abrupt, gently sloping and laterally with distinct, weak 

 bristles and stiff pile. Posterior basalare with a patch 

 of stiff; long setae; tegula with a few, short setae; 

 squama with a multiple fringe. 



Legs: All the femora are stout; the anterior and 

 middle pairs are rather strongly thickened, the hind 

 pair slightly tliickened but a little more slender toward 

 the base. The dorsal and lateral pile is fine, appressed 

 and setate. Stout, long bristles are present, and on the 

 hind femur they consist of 1 subapical dorsomedial, 

 1 subapical dorsolateral forming part of a row of 3, 

 and 6 quite long, stout, ventrolateral, i longer equally 

 stout, ventromedial bristles restricted to the basal half; 

 trochanters with 3 ; coxae with only quite weak bristles. 

 The hind tibia has 2 long, slender, pale bristles ; 1 stout, 

 black basal lateral bristle; and 1 very long, lateral 

 bristle beyond the middle; and also 2 stout, ventro- 

 lateral elements at the middle and beyond. A brush 

 of dense setae extends from the base but is only sub- 

 appressed, continuing on to the first 3 tarsal segments. 

 Middle femur with 1 stout, posterodorsal apical bristle; 

 also with 2 posterior and 2 anterior bristles, 1 of each 

 group located near the base, the other at the outer third ; 

 also 5 exceptionally stout and long anteroventral bristles 

 that tend to interlock with 3 anterior tibial bristles. 

 The middle tibia has 3 posterior, 2 quite long, attenuate, 

 pale posteroventral, and 2 weak dorsal bristles. Ante- 

 rior femur without the anterior and posterior bristles 

 but with a rather dense ventral fringe of extremely long, 

 delicate bristles or bristly hairs; its tibia has 3 short 

 dorsal elements and 3 exceptionally long, basally stout, 

 posterior bristles ; apex with about 10 bristles. Tarsus 

 ends in large, long, truncate pulvilli ; long empodium ; 

 long, slender, apically bent claw. 



Wings : The wings are broad and in the males often 

 greatly expanded, especially in the marginal and sub- 

 marginal cells, with the costa bulging outward ; the sub- 

 costal cell may be almost eliminated, its vein overlying 

 the costa through the middle of the wing. Marginal 

 cell closed and narrowly stalked. Both submarginal 

 cells are strongly arched forward and again backward 

 at the apex. Fourth posterior cell closed and unusually 

 strongly convex anteriorly, reducing the middle width 

 of the discal cell by at least a third. The second basal 

 cell ends in two veins; anal cell closed and petiolate; 



alula large, ambient vein complete. Wing strongly 

 rippled, the apical portion with villL 



Abdomen: The abdomen is comparatively slender, 

 not very long and not as wide as the mesonotiun, cylin- 

 drical and slightly tapering; the sides of the first ter- 

 gite are strongly swollen and ridged anteriorly. Pile 

 of abdomen short, appressed, setate along the middles 

 of the tergite, but becoming long, fine and erect lat- 

 erally. All the tergites bear stout, lateral bristles with 

 3 or 4 on the first tergite; 2 or 3 on second through 

 fourth tergites ; those on the fifth and sixth tergites are 

 much weaker. Sternites with fine, stiff pile and no 

 bristles. Eight tergites are present in the male, the 

 last short. Seven tergites present in the female, the 

 remainder incorporated in the ovipositor. Male termi- 

 nalia with characteristically elongate but rather slender 

 superior forceps; the proctiger is long, protruded and 

 erect. The short gonopod and claspers tend to be bent 

 or arched downward so that a large space or gap is 

 left from the lateral aspect. Eighth sternite vei-y sliort, 

 or even concealed, hypandrium short or long but if 

 short it is notched or divided. Aedeagus often exposed 

 and conspicuous. Female terminalia consist of the 

 eighth to tenth segments; all these segments are 

 strongly compressed laterally beginning at the base 

 of the eighth segment but they are completely com- 

 pressed only at the end of this segment and beyond; 

 these three segments ai-e also progressively i-educed in 

 height. Eighth segment as long as the sixth and 

 seventh combined. 



Distribution: Oriental: Clephydroneura annulatus 

 Fabricius (1775) [ = JaWiwi Walter (184:9)1 ; apicalis 

 Oldroyd (1938) ; hengalensis Macquart (1838) ; hrevi- 

 pennis Oldroyd (1938) ; cochinensis Oldroyd (1938) ; 

 cristata Oldroyd (1938); dktincta Oldroyd (1938); 

 duvaucelii Macquart (1838); exilis Oldroyd (1938); 

 ■flavicornis Macquart (1838) \_=iam.enes Walker 

 (1849)], flavicornis fusca Oldroyd (1938); gymnura 

 Oldroyd (1938) ; minor Oldroyd (1938) ; pulla Old- 

 royd (1938); semh'ufa Oldroyd (1938); sundaicus 

 Jaennicke (1867); xanthopus Wiedemann (1819), 

 xanthopus wulpi Oldroyd (1938). 



Genus Anarmostus Loew 



FiouEES 393, 759, 1617, 1618, 2254, 2306, 2362, 2444 



Anarmostus Loew, Abh. Naturw. Ver. Halle, voL 2, p. 142, 

 1860. Type of genus : Asilus iopterus Wiedemann, 1828, by 

 original designation. 



Flies distinguished by the robust, apically tapered 

 abdomen, the short pile and the posterior mats of pile 

 on the first 4 tibiae, the greatly thickened, anterior and 

 posterior basitarsi and the broad wmgs. These flies 

 suggest in their appearance the genus MallopTiora Mac- 

 quart. The claws are sharp. Length 15 to 20 mm. 



Head, lateral aspect : The face on the upper half is 

 not at all visible in profUe ; the lower portion is slightly 

 protuberant and gently rounded. The eye below is an- 

 teriorly and posteriorly recessive, therefore somewhat 



