ROBBER FLIES OF THE WORLD 



533 



ceps narrowed distally, with the tips of the processes 

 curved medially and often leaving an open space on 

 the dorsal aspect. The terminalia are not rotate; the 

 gonopod is much shorter and the hypandrium present 

 and about half as long as the gonopod. Eighth sternite 

 simple and short, or sometimes exceptionally reduced. 

 The female terminalia consist of the seventh to tenth 

 segments; the seventh segment is abruptly compressed 

 in the middle; the posterior half of this segment and 

 the remaining segments are compressed, leaf-tliin. 



Distribution : Ethiopian : Lophopeltis abuntius Walk- 

 er (1849) ; albion Curran (1934) ; Alhopilosus Ricardo 

 (1920) ; (iTbofasckitus Ricardo (1920) ; angoJa Cur- 

 ran (1934) ; angustibarhus Loew (1858) ; amo Curran 

 (1934) ; foma^MS Wiedemann (1821) [ = erythracanthus 

 Hermann (1907)] ; cuthbertsoni Curran (1934) ; geni- 

 talis Ricardo (1925) ; leucotaenia Bezzi (1906) ; mama- 

 thesiana Bromley (1947) ; inarshalU Hobby (1934) ; 

 moZzVo?" Wiedemann (1828) ; montanus'RiQ.^vdo (1920) ; 

 nigricans Ricardo (1920); nigripes Ricardo (1920); 

 parva Ricardo (1920); pelUtus Wiedemann (1819) 

 [=isse Walker (1849) , ustulata Loew (1857) ] ; pnlchra 

 Loew (1858) [alhovittata Schiner (1867)]; rapax Ri- 

 cardo (1920) ; rhodesiensis Hobby (1933) ; rhodesii 

 Ricardo (1920); setiventris Loew (1858); similis Ri- 

 cardo (1920) ; spiniventris'Loev! (1858) ; transvaalensis 

 Ricardo (1920) ; wroughtoni Ricardo (1920). 



Subgenus Lophybus Engel 

 FiGUBES 300, 772, 1472, 1483 



Lophyius Engel, Bull. Soc. Ent. Egypte, vol. 8, p. 348, 1925. 

 Type of subgenus: Lophonotus melanolophus Loew, 1858, 

 original designation. 



Small or medium size flies, similar to genus Neo- 

 lophonotus Engel. The arrangement of the face and 

 its bristles, the mesonotal and scutellar pile and bristles 

 are similar. The flies differ principally in the presence 

 of strong tergal bristles on the abdomen. The absence 

 of such bristles on the stemites, separates them from 

 subgenus Lophoj}eUis Engel. The terminal proctiger 

 of the female, or cerci end in a spine on each side, so 

 that the tip of the ovipositor seen from above generally 

 appears to be bifurcate. Length 12 to 22 mm. 



Wings: The wings have the second posterior cell 

 moderately widened at the base, but rather gradually 

 and the posterior crossvein is long, tending to parallel 

 the upper border of the discal cell. The closing end 

 vein of the fourth posterior cell tends to be nearly 

 transverse to the wing and the anterior crossvein rec- 

 tangular in contrast to the oblique crossvein generally 

 present in N eolophonotus. The hypopygium is simple. 



Distribution : Ethiopian : Lophybus aphellas Walker 

 (1849) ; congoensis Ricardo (1920) ; dispar Engel 

 (1927) ; elgon Oldroyd (1939) ; favopilosus Ricardo 

 (1920) ; melanolophus Loew (1858) ; noas Walker 

 (1849) ; tarsalis Ricardo (1920). 



Labromyia, new genus 

 Figures 341, 722, 1456, 1466, 2266, 2327, 2425, 2435 



Type of genus : Labromyia albibarbis, new species. 



Medium size flies related to the N eolophonotus Engel 

 group of genera which have their home in South Africa. 

 They difier in several respects. The antennal style is 

 quite long, at least twice as long as the third segment 

 whereas in the N eolophonotus group it is usually shorter 

 than the tliird segment or no longer. Lower occiput not 

 at all prominent ; base of second posterior cell scarcely 

 widened and only gradually; the anterior crossvein is 

 only slightly oblique. Male terminalia short and obtuse. 

 The female terminalia resemble Lophopeltis Engel but 

 are quite wide on the basal half of the ninth tergite, 

 leaf-flat on the posterior half. Length 14 mm. 



Head, lateral aspect : The face is moderately produced 

 beginning shortly beneath the antenna with the whole 

 surface convex, much as in N eolophonotus. Occiput 

 moderately developed over the middle but less promi- 

 nent at the vertex and below. It bears about 13 weak, 

 pale yellow, slightly curved bristles which begin above 

 the middle of the head; the lowermost elements are 

 strongly turned downward and a little backward ; lower 

 occipital pile abundant and yellowish white. The pro- 

 boscis is comparatively slender and extends beyond the 

 face with a blmitly rounded apex; apex with a few fine 

 hairs; the ventral surface in the middle has a tuft of 

 long hairs. Palpus small, cylindrical with scattered, 

 long, fine or bristly hairs. The a ntemia is rather slender 

 and style excepted is considerably shorter than the head. 

 The first segment is longer than the second and slightly 

 longer than the third segment. The tliird segment is 

 oval and tapered distally, with a minute, microsegment 

 followed by a long style, nearly as long as all 3 seg- 

 ments. Tlie first segment bears a number of moderately 

 long bristles below, a few setae above and second seg- 

 ment with long, distal setae above and below. 



Head, anterior aspect : The face beneath the antenna 

 is a little more than a fourth the head width, but less 

 than a third the head width; it is slightly widened 

 below. The face is densely beset with long, weak 

 bristles or stiff bristly hairs beginning near the antemia 

 at the point where the face elevation begins to develop. 

 There is a shallow but distinct transverse furrow or 

 fossa across the face immediately below the antenna. 

 The bristles of the face continue equally numerous 

 down to the epistoma and along the sides of the sub- 

 epistoma. Front short, with about 13 bristles on each 

 side. Vertex deeply excavated with slanting sides. The 

 ocellarium is small, low, and bears on each side 3 long, 

 well developed bristles in a longitudinal row. An- 

 terior eye facets moderately enlarged. 



Thorax : The mesonotum has a row of acrostical ele- 

 ments tripled to quadrupled in front along the anterior 

 margin. Dorsocentral elements are present laterally, 

 spreading out over the entire lateral portion of the 

 mesonotum with a narrow, bare band between; the 

 humerus bears 7 or 8 short, black setae posteriorly and 

 a few, fine, pale, erect hairs anteroventrally. The 



