184 



■UNITED STATES NATIONAL MUSEUM BULLETIN 224 



PART 1 



numerous bristly hairs. Female terminalia with a row 

 of spines on the acanthophorites ; lateral processes with 

 3 or 4 sharp setate spines. 



Distribution: Palaearctic: Grypoctonus aino Speiser 

 (1928) ; daimyo Speiser (1928) ; lama Speiser (1928). 



Genus Oldroydia Hull 



Figuees 78, 507, 1001, 1002, 1701 



Oldroydia Hull, Ann. Mag. Nat Hist., ser. 12, vol. 9, p. 398, 

 1956. Type of genus : Oldroydia hamata Hull, 1956, by 

 original designation. 



Medium size flies resembling Cyrtopogon Loew and 

 at once distinguished by the hamate anterior femur in 

 males, and in both sexes by the dense mesonotal mane 

 and the exceptionally long, slender, third antenna! seg- 

 ment with conspicuously flared apex and subapical 

 spine. The face is strongly gibbous, evenly convex from 

 antenna to epistoma and densely, very stiffly pilose. 

 Length 17 mm, 



Head, lateral aspect: The face is rather strongly 

 produced in its full length, convex, abruptly retreating 

 beneath the antenna. Dorsal occiput without bristles. 

 The proboscis is rather short, directed obliquely for- 

 ward, or straight forward, slightly compressed laterally 

 and bearing numerous, long, fine, yellow hairs ventrally. 

 The palpus is small and cylindrical with two segments 

 and a few fine, long hairs ventrally; segment one is 

 excavated and quite short. The antenna is elongate ; the 

 first segment is 1^2 times as long as the second, the third 

 segment quite slender and almost stylelike; it is a 

 little thicker at the base, 2y 2 times as long as the first 

 two segments and bears at its apex a strongly expanded, 

 flat, subtriangular, spade-shaped structure which in 

 turn bears subapically a spine, both sexes have the an- 

 tenna alike. 



Head, anterior aspect : The face is strongly divergent 

 below and beneath the antenna it is only about one-fifth 

 as wide as the head. The pile of the face is exceedingly 

 long and very abundant and directed outward in a ra- 

 diating fan. The sides of the front and the ocellarium 

 bear numerous, long, fine, erect hairs. The anterior 

 eye facets are strongly enlarged, centrally and medially. 



Thorax : The mesonotum has a high, narrow, dense, 

 medial crest of erect pile. Lateral portion of the meso- 

 notum with fine, slender, scattered, bristly hairs. Hu- 

 merus with numerous, long, fine hairs. There are some 

 hairs on the mesonotum, shorter and stiffer than the 

 remainder, notopleuron with a cluster of 7 or 8 of these, 

 supraalar region with 10 or 12; the scutellum densely 

 covered with extremely long, erect, brownish pile. 

 Upper anterior comer of mesopleuron with a tuft of 

 black hairs. Remainder of mesopleural pile confined 

 to the posterior half. Hypopleuron and pteropleuron 

 without pile. Presternum dissociated. 



Legs: The femora are rather slender, only a little 

 lengthened and without bristles but with a row of 

 rather long, erect, ventral pile which becomes still 

 longer submedially or towards the medial aspect. This 



pile, while stiff, is hardly of the nature of bristles. 

 Dorsal surface also with some extremely long, deli- 

 cate pile. The hind tibia bears slender bristles, 10 lat- 

 erally, 15 dorsally, and 5 ventrally. Middle femur 

 with long pile posteriorly and anteriorly, its tibia with 

 a somewhat appressed row of 5 quite long dorsal and 

 at least as many posterior bristles. Anterior femur 

 with very long hair dorsally on the basal half, shorter 

 beyond; its tibia bears 4 or 5 short bristles dorsally 

 and 6 or 7 longer ones posteriorly. Apex of anterior 

 tibia without spine or spur. Claws sharp and slender, 

 the pulvilli nearly as long as the claws. The males 

 bear a long, prominent, somewhat twisted, apically 

 flared, hammerlike or chisellike, ventrobasal process on 

 the anterior femur. Anterior coxa long and with a 

 dense mat of long, fine pile. 



Wings : All the posterior cells are rather widely open ; 

 marginal cell widely open; costal and subcostal cell 

 narrow; anal cell widely open. Alula present and 

 narrow and ambient vein complete. 



Abdomen: The abdomen is distinctly compressed 

 laterally but tending to be subcylindrical. Males with 

 eight tergites, the eighth extremely short. There are 

 eight tergites visible in the female, the last one only 

 one-third as long as the seventh and bearing 4 or 5 

 pairs of short, rather sharp spines on either side. The 

 abdomen is densely long pilose but not bristly; it 

 appears to be naturally compressed laterally. The 

 sternites bear pile which is long. Male terminalia 

 moderately conspicuous, rotate 90 degrees. The epan- 

 drium is uncleft but has a fused, apical notch and 

 medial groove or fissure. The gonopod is prominent 

 and convex ; the hypandrium is convex, bulging, broad 

 and densely, long, stiffly pilose: Females with acan- 

 thophorites and 6 pairs of slender, long, sharp spines. 



Distribution: Oriental: Oldroydia hamata Hull 

 (1956). 



Genus Toremyia Hull 



Figukes 79, 160, 504 



Toremyia Hull, Ann. Mag. Nat. Hist., ser. 12, vol. 10, p. 893, 

 1957. Type of genus: Dasypogon scatophngoides Walker, 

 1854, by original designation. 



Medium size flies related to Cyrtopogon Loew and 

 Grypoctonus Speiser. The abdomen tends to be com- 

 pressed laterally and they are distinguished in both 

 sexes by the wide, costal cell, the extremely narrow sub- 

 costal cell, and, further, in the males, by a long, stout, 

 clublike, erect and curved process found at the base of 

 the anterior femur. Also distinguished by the elongate, 

 arched, anterior basitarsus and the medially arched, 

 basal tei-gite ; the latter is present in both sexes. A con- 

 spicuous, narrow, dense, mesonotal mane distinguishes 

 it from all except Eucyrtopogon Curran and Coman- 

 tella Curran. Length 17 mm. 



Head, lateral aspect: The face is very strongly gib- 

 bous throughout and also convex from the dorsal as- 

 pect. The eye is comparatively short, convex anteriorly, 

 plane on the upper posterior profile but strongly reces- 

 sive anteriorly beginning at the middle. The occiput 



