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UNITED STATES NATIONAL MUSEUM BULLETIN 224 



bears only a little pollen and is continued backward 

 as a rounded ridge. 



Thorax: The mesonotum is high, long, strongly 

 arched or convex posteriorly but abrupt anteriorly and 

 slightly overhangs the pronotum. The surface is thinly 

 micropubescent and pile very scanty, consisting of fine 

 setae laterally. Acrostical bristles or setae are differ- 

 entiated and fine dorsocentral bristles or hairs occur 

 in the middle of the anterior half of the mesonotum. 

 These latter become longer posteriorly but never very 

 long and they remain fine and are distributed in 2 or 

 3 rows on each side. Hiunerus for the most part pol- 

 ished and bare, with 4 or 5 minute setae anteriorly. 

 The lateral complement of stout, long bristles includes 

 1 notopleural and 1 supraalar; on the postalar region 

 are only 2 or 3 hairs. Margin of the scutellum with 

 10 or 12 setae on each side and about 15 similar setae 

 along the base of the flattened disc. Pronotum and 

 most of the prothorax, except the middle posterior 

 portion, pollinose only. Beneath the anterior spiracle 

 and posteriorly above the anterior coxa is a patch of 

 long, stiff pile, and there is similar, shorter pile abun- 

 dantly on the whole upper half of the mesopleuron 

 and some on the posterior half of the pteropleuron. 

 The metapleuron bears 1 or 2 medial bristles and 

 considerable bristly pile. Metanotal callosity pollinose 

 only. The postmetacoxal area appears to form a com- 

 plete, chitinized arch with a medial seam. The whole 

 of it is covered with pubescence. Prosternum com- 

 pletely fused laterally. 



Legs : All the femora and tibiae elongate, especially 

 the hind pair. The pile is rather scanty but for the 

 most part uniformly distributed, fine, suberect, and 

 setate. Bristles are few, but those present are for the 

 most part stout and conspicuous. The hind femur 

 on inner side, near middle bears a conspicuous flock of 

 isolated, long, coarse, erect hairs. At the apex this 

 femur bears 1 stout bristle dorsolaterally and 2 dorso- 

 medially. This tibia carries 7 dorsal bristles and 1 still 

 longer ventrolateral bristle at the outer fourth ; the apex 

 has 4 stout bristles and 2 much smaller elements. 

 Middle femur with weaker bristles. There is an ob- 

 lique row of 4 or 5 at the apex posteriorly, a similar 

 row of 4 not quite so close to the apex anteriorly, this 

 anterior row of bristles continued by 4 additional bristles 

 extending basad along distal and anterior margin; its 

 tibia has 1 long, stout, posterior bristle distally and a 

 row of 5 or 6 posteroventral bristles, 1 of them long and 

 all of them stout. Anterior femur with bristles similar 

 to those of the middle femur, its tibia with bristles like- 

 wise similar. Tarsi with stout, long, sharp bristles on 

 either side. Claws long, sharp, only a little curved, the 

 pnlvilli absent, the stout, bladelike empodium half as 

 long as the claw. 



Wings : The wings are long and comparatively broad, 

 often tinged with yellowish brown. The discal cell 

 ends in a single vein, the posterior crossvein; this is 

 caused by the fork of the fourth vein being situated far 

 towards the base and close to the anterior crossvein, 

 which lies generally opposite the base of the fourth 



posterior cell. Anal cell closed with a long stalk ; alula 

 absent, ambient vein complete. 



Abdomen : The abdomen is long, narrow, and cylin- 

 drical on the first four segments, considerably widened 

 beginning at the base of the fifth segment. The first 

 segment is quite short, the second segment at least iy 2 

 times as long as the third, and the third and fourth 

 segments nearly equal in length. 



Females with eight tergites, the eighth half as long 

 as seventh. First tergite with six pairs of long, stout 

 bristles laterally and more slender bristles toward the 

 middle of the segment. Pile of abdomen scanty and 

 fine on the basal segment, becoming a little more abun- 

 dant and forming fine, appressed setae on the posterior, 

 club-shaped portion of the abdomen. 



Distribution: Oriental: Lagynogaster affinis Frey 

 (1937); antennalis Hsia (1949); boettcheri Frey 

 (1937) ; claripennis Hsia (1949) ; dimidiata Hsia 

 (1949) ; fuliginosa Hermann (1917) ; inscriptus Her- 

 mann (1917); princeps Osten Sacken (1882); sauleri 

 Hermann (1917) ; suensoni Frey (1937) ; stigmatica 

 Hermann (1917) ; vitalisiana Frey (1937). 



Australian : Lagynogaster destttlatoria Hermann 

 (1917) ; timoremis Frey (1937). 



Genus Ophionomima Enderlein 



Figures 192, 599, 1183a, 1191, 1593, 2061 



Ophionomima Enderlein, Wiener Ent. Zeitung, vol. 33, p. 157, 

 1914. Type of genus: Ophionomima solocifemur Ender- 

 lein, 1914, by original designation. 



Large flies characterized by the strongly and distally 

 swollen hind femur which bears dense, long, dorsal, 

 ventral and shorter medial and lateral brushes of pile. 

 Pile and bristles greatly reduced, the anal cell with 

 a long stalk, the end veins of the second basal cell are 

 fused for a considerable distance; and the postmeta- 

 coxal area and ventral metasternum are membranous. 

 Length 25 mm. 



Head, lateral aspect: Only a very small, low, ventral, 

 more or less triangular protuberance shows at the 

 region of the epistoma; the remainder is plane with 

 the eye. The eye is prominent and long, strongly con- 

 vex anteriorly and gently convex behind. The occiput 

 in profile is scarcely visible, the pile scanty, fine and 

 bristly on the lower half, with slightly better developed 

 bristly hairs dorsally. Proboscis prominent and rather 

 long but subcylmdrical and tapered dorsoapically to a 

 bluntly rounded point; the dorsomedial ridge is mod- 

 erately developed in the middle and closer to the base. 

 Apex with a few short, stiff hairs. Palpus of a single, 

 short, cylindrical segment which bears a few apical 

 bristles. Antenna attached at the upper third of the 

 head, elongate and slender; the first two segments are 

 quite short, of nearly equal length. The third seg- 

 ment is gradually and slightly tapered from the base 

 to the apex, which is rather narrow; style excluded, 

 it is not quite twice as long as the combined length of 

 the first two; at its apex it bears a stout style, half 



