DASYP0G0N1NAE 



ROBBER FLIES OF THE WORLD 



225 



39. Third antennal segment slender; no long, anterior dorso- 



central bristles Aczelia Carrera 



Third antennal segment dilated in the middle. Well devel- 

 oped, long, anterior, dorsoeentral bristles present. Male 

 epandrium long, cleft, closely overlapping. Small flies. 



Lycomax, new subgenus 



40. Upper element of the end veins of the discal cell (upper sec- 



tion of anterior intercalary vein) wanting; base of second 

 posterior cell not unusually wide. Face convex, slightly 

 concave above the epistoma ; lower half with bristly pile ; 

 epistoma with 1 row of bristles . . Rachiopogon Ricardo 

 Upper element of anterior intercalary vein of usual ex- 

 tent 41 



41. Face slightly or sometimes strongly concave. Apex of third 



antennal segment with a spoon-shaped, small microseg- 

 ment ; second palpal segment enlarged with terminal ori- 

 fice; face pile and bristles restricted to the lower 



third 42 



Face nearly plane or distinctly convex, rarely slightly con- 

 cave. Third antennal microsegment cylindrical, attenuate 

 or rarely obliquely truncate 43 



42. Scutellum with stout bristles ; abdomen with parallel sides 



or slightly clavate. Second palpal segment large but 



ordinary Austkosaropogon Hardy 



Scutellum with stiff or fine marginal hairs. Abdomen 

 strongly clavate or capitate. Second palpal segment large, 

 clavate, with large, flattened, apical pore. 



Daptolestes, new subgenus 



43. Face on the greater part strongly gibbous, rounded and 



produced, the gibbous portion densely bristly or pilose. 



Tibial spine subsigmoid 44 



Face without prominent, bristly or pilose gibbosity, at most 

 with short, low, inconspicuous gibbosity, the intervening 

 area sometimes gently concave 45 



44. Face gibbosity unusually prominent and extending to or 



very near the base of the antenna. Face everywhere beset 

 with dense, long bristly pile. Third antennal segment 

 elongate, slender, attenuate, with two long, slender micro- 

 segments. Mesonotum high, hump-backed, with a medial 

 mane and the head drooping. Tibial spine slender. Sec- 

 ond palpal segment with apical third bare. The third vein 

 branches before the discal crossvein. 



Comanteixa Curran 

 Face gibbosity short, rather abruptly developed at the upper 

 third of the head ; and with stout bristles. Third antennal 

 segment stout, often dilated distally with short, stout 

 microsegment. Tibial spine stout at base. Apex of palpus 

 bristly. The third vein branched opposite the discal 

 crossvein Lestomtia Williston 



45. Subepistomal area large ; neck exceptionally prominent and 



lengthened. Third antennal segment generally swollen 

 distally. Face nearly or quite apilose and mystax reduced 

 to 1 to 3 pairs of bristles; if face is pilose, there is a 

 mesonotal mane. Male terminalia with characteristic, 

 long, troughlike, uncleft, rotate epandrium and the re- 

 maining parts short with interior structures and aedeagus 

 exposed. Proboscis long and stout. For the most part 

 elongate, slender flies of unusual bareness and few 

 bristles ; hind legs more or less elongate ; anterior tibial 

 protuberance and basitarsal process unusually large, 



conspicuous 46 



Flies of different construction 48 



46. A small, dense tuft of fine, erect or suberect pile situated on 



the hypopleuron just above the hind coxa. Tibiae and 



tarsi of males unornamented 47 



Patch of hypopleural, dense pile absent. Hind tibiae or 

 tarsi or both in males ornamented with a conspicuous 

 fringe of large, flat scales on each side . Lagodias Loew 



47. Mesonotum with a mane ; face with abundant, fine 



pile Pegesimaixus Loew 



Mesonotum without mane ; face usually bare, sometimes 

 pilose. Bristles above epistoma long and stout, confined 

 to 1 row of 1 to 3 or more pairs. Abdomen elongate, 

 slightly clavate ; relatively bare flies. 



Neolaparus Williston 



48. Anterior tarsus greatly lengthened; twice as long as its 



tibia ; middle end vein of second basal cell eliminated. 



Annamyia Pritchard 

 Anterior tibia of normal length 49 



49. Apex of abdomen laterally with scaliform pile; face very 



short above, moderately produced and convex below. 



Cleptomyia Carrera 

 Scaliform pile everywhere absent 50 



50. Spine at apex of anterior tibia attached without accompany- 



ing process or lobe, however short, and spine character- 

 istically always fine, slender and usually twisted or bent. 

 Small, slender, usually pollinose flies, the face very short, 

 convex, plane with eye or slightly protuberant above the 

 epistoma. Anterior basitarsus without process ; denticles 



present or absent 51 



Spine at apex of tibia attached with protuberance or process, 

 short or often quite long and spine stout and robust ; ante- 

 rior basitarsi with denticles and usually with well devel- 

 oped process. Medium size to large flies, rarely small . 59 



51. Only fine setae at the base of the anterior basitarsus. Ocel- 



larium prominent with vertical sides 52 



Denticles present at the base of the anterior basitarsus. 

 Ocellarium usually weak or low 56 



52. Abdomen of male expanded into a flattened shield posteriorly 



with dense, appressed, silvery setae ; abdomen of female 



wide and flattened throughout . . Nicocles Jaennicke 



Abdomen cylindroid or tapering, at most moderately or 



gently flattened, edges rolled 53 



53. Face rather prominent throughout, but nearly flat or plane 



above and gently rounded below. Lower half of face with 

 numerous, exceptionally stout, long bristles and postocel- 

 larium with 2 or 3 pairs of similarly stout, very long 

 bristles. Proboscis considerably longer than the face. 



Paraphamartania Engel 

 Face scarcely or not at all extending beyond the plane of the 

 eye, or slightly protuberant above the short, subepistomal 

 sclerites. Width of face a fourth to a fifth of total head 

 width. Apex of middle tibia with a conical, bristly spine 

 or stout bristles and setae 54 



54. First antennal segment ventrally with 2 or 3 exceptionally 



long, stout bristles. Ocellar, mystax and dorsoeentral 

 bristles exceptionally long and stouter than in allied 

 genera. Male epandrial plate narrowly connected basally 

 and produced laterally into a long, wide, conspicuous, flat- 

 tened, winglike process. Anterior tibial spine strongly 

 curved and clawlike. Middle end vein of second basal cell 

 eliminated ; third antennal segment attenuate. Flies of 14 

 mm. length ; ocellarium set forward . Aspidopyga Carrera 

 Small flies without strong bristles. Second basal cell ends 

 in 3 veins 55 



55. Mystax with a row of weak bristles ; face with fine, scattered 



pile of reduced amount, usually nearly absent. 



Cophura Osten Sacken 



Mystax composed of a few, long, bristly hairs. Whole face 



rather densely long, fine pilose, the pile as long as the 



mystax ; occiput, vertex, the mesonotum and the base of 



the abdomen densely pilose .... Buckellia Curran 



56. Face plane, not produced beyond the eye profile, except for 



a very inconsiderable extent on the lowest portion and 

 therefore scarcely visible in profile. Subfacial sclerites 

 small, short, subhorizontal and inconspicuous. Mesonotum 

 forming a high, arched hump equally steep posteriorly as 



well as anteriorly 57 



Face distinctly produced beyond the eye margin, either be- 

 low or over the whole face, subfacial sclerite prominent, 

 long, oblique, well developed 58 



57. Mesonotum densely long, erect pilose. Abdomen broad, 



short, rather robust. Surface punctures everywhere ab- 

 sent. Ventral surface of hind tibia with dense fringe of 

 erect or nearly erect pile, appressed only at apex. Palpus 

 attenuate, with a few, stiff hairs ventrolateral^. Ante- 

 rior tibial spur slender, subsigmoid . Aterpogon Hardy 



