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UNITED STATES NATIONAL MUSEUM BULLETIN 224 



Gonopod small and short. Hypandrium broad and 

 short with a bristly, curved, medial process, lobe or ex- 

 tension. Much of the cavity is open. Female terminalia 

 with 4 pairs of long, slender, pointed but hollowed 

 spines; accessory spines or bristles absent, but with con- 

 siderable bristly hairs. The ventral plate extends be- 

 yond the eighth tergite, is triangular, compressed and 

 split on the apical half. 



Distribution: Neotropical: Hypenetes asiliformis 

 Wulp (1882) ; ful v icornis Macquart (1846) ; nigribarbis 

 Philippi (1865); obtusus Engel (1930); punctipennis 

 Philippi (1865); rubricornis Philippi (1865); rufes- 

 cens Philippi (1865) ; tertidlis Bromley (1932). 



Ethiopian: Hypenetes grisescens Engel (1929); 

 stigmatias Loew (1858). 



Tillobroma, new subgenus 



Type of subgenus: Clavator punctipennis Philippi, 

 1865. 



I distinguish the South American species of Hypene- 

 tes Loew from the African species of the same genus on 

 the basis of their smaller size, and the short, fine, sim- 

 ple bristles or bristly hairs of the occiput; these are 

 stout, conspicuous, and strongly proclinate in the Afri- 

 can species. The proboscis is smaller and less robust, 

 the occiput less tumid and swollen. Length 10 to 

 12 mm. 



Genus Neodioctria Ricardo 



Figures 129, 484, 1014, 1023, 1690, 1834, 1835, 1873, 1987, 2009 



Neodioctria Ricardo, Ann. Mag. Nat. Hist., ser. 9, vol. 1, p. 58, 

 1918. Type of genus : Neodioctria australis Ricardo, 1918, 

 by original designation. 



Medium size, slender and elongate flies; the known 

 species are brownish orange and black with brown 

 tinged wings. Abdomen cylindroid with parallel sides. 

 Bare, shining flies with small, scanty, scattered setae 

 and few bristles. Face relatively short and greatly 

 rounded with bristles and pile confined to 1 or 2 rows 

 at the epistoma. Protibial apex without spur; pro- 

 sternum dissociated; male epandrium not developed 

 into forceps and these terminalia rotate one-fourth; 

 females with acanthophorites and spines. This genus 

 has one peculiarity which immediately distinguishes 

 it in either sex from all Asilids except Neocyrtopogon 

 Ricardo; the apex of the proboscis is bifid. It is not 

 related to that genus which has a well developed pro- 

 tibial spine, whereas Neodioctria has none. Length 15 

 to 18 mm. 



Head, lateral aspect: Face moderately produced be- 

 yond the eye, but nowhere prominent; it is gently con- 

 vex from beneath the antenna to the lowest quarter, 

 which is so slightly produced that there is a very slight 

 concavity over this portion. Occiput moderately devel- 

 oped in profile, but sloping gradually down to the 

 eye margin so that it is better developed sublaterally; 

 both dorsally and ventrally it recedes to the eye mar- 

 gin. Pile of occiput below moderately abundant and 



coarse but not dense. Upper half of occiput with a few 

 slender, somewhat proclinate bristles, and medial to the 

 upper eye corners and somewhat deeply placed are 3 

 or 4 more stout, nearly straight, pale brown bristles. 

 Proboscis comparatively short but extended as far for- 

 ward as the ends of the lower mystax and either 

 obliquely directed forward or nearly horizontal. It is 

 robust in the middle and in profile only is narrowed 

 basally. It is rather strongly tapered near the apex 

 and more gently tapered from the middle to the apex. 

 The bluntly rounded, narrowed apex is slightly turned 

 downward and is nearly bare, having only a few, fine, 

 very small, ventral hairs. Characteristically in dorsal 

 aspect the narrowed apex is bifid or cleft ; no keel pres- 

 ent. Palpus of two segments, the second set at a strong 

 angle, short, robust, with a few fine, stiff hairs. Basal 

 segment excavated and short with some long, stiff pile. 



The antenna is a little longer than the head, set at the 

 upper fourth of the head and comparatively slender. 

 The first and second segments are of nearly equal 

 length. The third segment is about four times the 

 length of the second segment, of the same width or 

 barely wider and slightly narrowed on the apical third. 

 It bears a small, short microsegment directed obliquely 

 downward, dorsally the apex is rather widely and cir- 

 cularly open with minute, enclosed spine; the whole 

 microsegment is somewhat cuplike. First segment of 

 antenna with long setae above and below, second seg- 

 ment ventrally with 2 long, stout, subapical bristles. 



Head, anterior aspect: The head is about ll/£ times as 

 wide as high. The face beneath the antenna is a little 

 more than one-fourth the head width and slightly and 

 gradually widened below. Face surface densely pale 

 pubescent, without pile except for 2 or 3 fine, long hairs 

 on each side near the middle of the lower third of the 

 face. On the epistomal margin is a single, curved, 

 transverse, scattered row of slender bristles. These are 

 slightly curved, extended chiefly forward, and reach al- 

 most to the apex of the proboscis. Subepistomal area 

 small but deeply concave and oblique. Front wider 

 than the upper face and the vertex barely narrowed ; it 

 is slightly concave, dark brown pollinose with a wide 

 band of scattered, stiff hairs along the eye margin. Ver- 

 tex almost without excavation, the sides gently sloping, 

 the ocellarium small and low but with steep sides and I 

 bearing a tuft of anteriorly appressed, short, weak I 

 bristles between the posterior ocelli and others behind. 

 Anterior eye facets a little enlarged. 



Thorax: The mesonotum is only moderately to 

 slightly convex, beset throughout with short, scattered, 

 stout, backwardly curved setae. Bristles of the meso- 

 notum are only moderately long and stout, and consist 

 of 2 notopleural, 1 supraalar, none on postalar callosity 

 or scutellum. Humerus with 12 fine, stiff hairs on the 

 anterior part only. Similar pile is continued laterally 

 behind the humerus to the suture. Dorsal setae clearly 

 differentiated into acrostical and dorsocentral rows, not 

 lengthened posteriorly. Scutellum thick, a little con- 

 vex with 8 setae on the disc, the posterior half strongly 

 sloping and the margin micropubescent. Metanotum 



