254 



UNITED STATES NATIONAL MUSEUM BULLETIN 224 



represents the eighth tergite as well). The gonopod 

 is robust basally, separated from the epandrial complex 

 by an apical and sometimes a basal space; it tends to 

 be thrust upward against the proctiger with a bristly, 

 posterior, attenuate process, curved backward at a right 

 angle; it tends to be semifused below to the prominent, 

 ventrally swollen mammiform hypandrium, held in a 

 dorsal position. 



The gonopod bears a medioventral process with 

 bristles and on each side two other interior processes 

 cloaked by the hood of the proctiger; one of these is 

 pronglike and slender without bristles, the other broad 

 and short with setae. The aedeagus is remarkably 

 long, slender, tubelike, often S -shaped and extending 

 out and beyond the cavity. Female terminalia with 

 acanthophorites and 4 or 5 pairs of partly recessed 

 spines. Basal plate with triangular, produced apex 

 which is medially notched or cleft. Ventral margin 

 of the eighth tergite with a medial ridge. 



The type of Wulp's species Cenopogon bifidus has 

 been compared with Ethiopian Neolaparus species and 

 I can find no basis for separation. The type of genus 

 Neolaparus tabidus was uncertainly ascribed by Ker- 

 tesz to "?Brazil, ?Ethiopia." There is hardly room 

 for doubt that N. tabidus is an Ethiopian species. The 

 genus is a large and characteristic element in the 

 southern African fauna. The only other species listed 

 from the New "World is Laparus argentinus, described 

 by Wulp, which has recently been made the type of the 

 new and unrelated genus Aczelia Carrera. A few 

 species of Neolaparus are found in the Orient. 



Distribution: Ethiopian: Neolaparus albicinctus 

 Ricardo (1900); albopunctatus Macquart (1846) 

 [=spinthe-r Walker (1849)]; falcippe Walker (1849); 

 fanaxilas Walker (1849); angusticornis Ricardo 

 (1925) ; apertus Karsch (1886) ; apicalis Bromley 

 (1936) ; atrox Bromley (1936) ; aulicus Wiedemann 

 (182S) [=anticus Loew (1860), maculiventris Loew 

 (1858)] ; banana Curran (1927) ; bicolor Loew (1858) ; 

 bivittatus Curran (1934); braunsi Bromley (1936); 

 caliginosus Loew (1857); clausus Loew (I860); 

 cuneatus Loew (1858) ; dimidiatus Bromley (1936) ; 

 esuriens Bromley (1936); faustus Karsch (1886); 

 foedus Loew (1863) ; fugax Bromley (1936) ; firivi- 

 penn'vs Bromley (1936) ; funestus Loew (1857) ; 

 fgracilipes Loew (1857) ; holotaenia Speiser (1910) ; 

 fletifer Walker (1851) ; flimbithorax Macquart 

 (1846) ; longicornis Curran (1927) ; lubumbashi Brom- 

 ley (1935) ; melasomus Loew (1857) [ = melanosomus 

 Schiner (1866)]; metallica Bromley (1936) ; moerens 

 Wiedemann (1828) ; munroi Bromley (1936) ; niger 

 Bromley (1936) ; ophion Speiser (1910) ; oralis Wulp 

 (1884) ; ornatus Bromley (1936) ; pedunculatus Loew 

 (1857) ; pollinosus Bromley (1936) ; pulchellus Brom- 

 ley (1936); pidchriveniris Loew (1857); rubrifemo- 

 ratus Bromley (1935) ; rufus Bromley (1936) ; similis 

 Curran (1927) ; singularis Bromley (1936) ; silaceus 

 Hermann (1907); solus Bromley (1936); squalidus 

 (1857) ; pollinosus Bromley (1936) ; pulchellus Brom- 



(1849) ; trifasciatus Oldroyd (1939) ; fvidens Walker 

 (1851). 



Oriental: Neolaparus cerco Walker (1849) ; volcatus 

 Walker (1849) [ = bifidus Wulp (1898), hypsaon 

 Walker (1849)]. 



Genus Pegesimallus Loew 



Figures 224, 580, 1086, 1095, 1735 



Pegesimallus Loew, Of vers. Svenska Vet.-Akad. Forhandl., vol. 



14, p. 344, 1858. Type of genus: Pegesimallus ursinus 



Loew, 1858, by monotypy. 

 Pagesimallus Verral, in Scudder, Nomenclator zoologicus, p. 243, 



18S2, lapsus. 



Medium size, delicate flies, the dorsal margin of the 

 abdomen strongly corrugate in profile, the metasternal 

 area elongate, the mesonotum rather strongly arched 

 and high anteriorly with dense, remarkably fine pile 

 over the whole disc. They are related to Neolaparus 

 Williston. They are distinguished by the wide face 

 which bears abundant, very fine, delicate, long pile in 

 addition to the single pair of supraepistomal bristles. 

 The male terminalia are similar to that of Neolaparus. 

 Abdomen somewhat drooping and subclavate. Length 

 10 to 14 mm. 



Head, lateral aspect : The face is unusually prominent, 

 very slightly convex, long in profile on the dorsal por- 

 tion and considerably longer on the ventral part, most 

 but not all of it due to the posterior recession of the 

 eye. The eye is comparatively short, somewhat more 

 narrow on the dorsal half, moderately convex ante- 

 riorly, and gently convex behind. The occiput is 

 developed only medially, from which point it slopes 

 immediately and gradually down to the eye margins; 

 the outer portion of the head therefore has the external 

 occiput very short, and quite eliminated in profile 

 dorsally. Pile of occiput moderately abundant, very 

 fine and crinkly and reduced in quantity over the middle 

 portion, where it is largely replaced by slender, bristly 

 hairs. These bristles become a little better developed 

 on the ventral portion of the occiput and are absent 

 dorsally in contrast to the usual situation. The 

 proboscis is laterally compressed, with an exceptionally 

 high, prominent, dorsomedial ridge confined to the 

 middle portion and basally sloping rather rapidly 

 down to the base and distally gently down to the small 

 but bluntly rounded apex, leaving the ventral surface 

 nearly plane. The apex and the ventral apical fifth 

 bear numerous, rather stiff, short hairs. The basal half 

 of the ventral surface has 10 to 12 long, fine hairs and 

 a row of 4 transverse, stiff, bristly hairs ventrally, in the 

 middle of the proboscis. Proboscis is directed obliquely 

 forward and downward. Palpus of two segments, the 

 first short, excavated, the second longer, cylindrical, 

 with numerous, stiff, long, slender bristles on all sides 

 and the apex. 



The antenna is attached at the upper fourth of the 

 head, moderately elongate, the first segment as long 

 as the second. The third segment is iy 2 times as long 





