DASIPOGONINAB 



ROBBER FLIES OF THE WORLD 



181 



high ridge. Palpus of two segments. The antenna is 

 set at the upper third of the head. The first two seg- 

 ments are rather stout, equal in length, both with nu- 

 merous, long hairs below, more upon the first segment 

 and some shorter pile dorsally. The third segment, 

 excluding style, is very little longer than the first two 

 segments together, including style and terminal bris- 

 tle it is not quite twice as long. The style has a minute, 

 basal segment, is of uniform width, except close to the 

 apex, where it rapidly draws to a point, and the whole 

 style is about two-thirds the length of the third seg- 

 ment. The third segment is as wide as the second on 

 its basal three-fourths then gently narrowed. 



Head, anterior aspect : Face and front relatively nar- 

 row, each with slight and nearly equal divergence 

 below and above. Face covered throughout with 

 dense, long, fine, abundant pile, longer on the lower 

 half where it is almost as long as the antenna. The 

 face below the antenna is about one-fourth the head 

 width. Front with only a few short,, fine hairs. Ex- 

 cavation of vertex deep and abrupt, the ocelli raised 

 on a vertical, conspicuous protuberance of the vertex. 

 Anterior central eye facets strongly enlarged. 



Thorax : The thorax is convex, similar to Eriopogon 

 Loew ; everywhere with long, abundant, fine pile which 

 is especially dense and long on postalar and postmeso- 

 notal regions. The convex scutellum has 3 or 4 pairs 

 of fine, long bristles on margin, the surface bare. Pro- 

 pleuron, middle sternopleuron and upper posteromeso- 

 pleuron, anterior hypopleuron and the convex, almost 

 protuberant metapleuron with dense, tufts of long, fine 

 pile; the whole metapleuron is covered; posthypo- 

 pleuron and pteropleuron bare. 



Legs: The legs are densely covered with long, fine, 

 white pile. The femora are slightly thickened. The 

 hind femur has 5 short bristles laterally on the outer 

 three-fifths. Middle femur with 2 dorsoapical and 4 

 anteroapical bristles, and the anterior femur with none. 

 Posterior tibia with 5 quite long, stout, anterolateral 

 bristles, evenly spaced ; it ends in 2 medial, 4 ventral, 

 and 2 lateral bristles. Middle tibia with 4 or 5 long, 

 strong, anterior and 4 posterior bristles; it ends in 2 

 ventral and 1 short anterior bristle. Anterior tibia 

 with 4 or 5 anterior and 4 posterior bristles. Anterior 

 tibia without spine. Tarsi end in fine empoclium and 

 well developed pulvilli. The ventral surface of the 

 hind tarsi in the right aspect shows blunt, protuberant, 

 black tubercles. 



Wings : The marginal cell is widely open. All poste- 

 rior cells are widely open except the fourth which is 

 slightly narrowed; anterior crossvein at the middle of 

 the discal cell. Anal cell closed in the margin. Alula 

 well developed ; ambient vein complete. 



Abdomen : The abdomen is densely long, fine pilose 

 on tergites, even more so on sternites. Eight segments 

 are visible, the last quite short. Abdomen obtuse, 

 cylindroid in form and obtuse at apex. Tergites quite 

 convex, sternum recessed and concealed. Male termi- 

 nalia only moderately protuberant, covered with long, 



obscuring pile. Female terminalia with 5 pairs of 

 dorsal spines. 



Distribution: Palaearctic: Jothopogon leucomallus 

 Loew (1870). 



Harpagobroma, new genus 

 Figures 103, 500, 970, 979, 1789, 1859, 1883, 1886 



Type of genus : Harpagobroma fumosa, new species. 



Small flies with plane face and exceptionally stout 

 occipital bristles which extend down nearly to the lower 

 eye corners; mystax stout, in one row but with a few 

 bristly hairs situated above. Ventral bristles of first 

 two antennal segments prominent; third segment with 

 a stout microsegment. All posterior cells and the anal 

 cell widely open. Length 10 mm. 



Head, lateral aspect : Head of moderate length. Face 

 short, distinctly plane and vertical, more prominent 

 below only because of the recession of the eye. The 

 occiput is everywhere quite prominent, especially above 

 and behind the vertex. Its pile is scanty and scattered, 

 consisting of bristly hairs below and distinct bristles 

 which begin near the middle of the head and constitute 

 a single row. The proboscis is only moderately stout, 

 tapered from the middle to a sharp, apical point; the 

 apex bears a few stiff hairs and more of them along 

 the apical ventral margin. The ventral basal half bears 

 3 or 4 long hairs on each side; the dorsomedial ridge is 

 low and inconspicuous and quickly disappears apically. 

 Palpus of 2 segments, the first excavated, the second 

 slender, not long, with the apex narrowed and bearing 

 a pore. Each segment with some scattered, bristly hairs 

 which on the second segment stop at the middle and do 

 not reach the apex. The antenna comparatively slender 

 and a little longer than the head. The first two seg- 

 ments are robust, the first barely longer than the second, 

 both with 3 or 4 bristles ventrolaterally and 5 or 6 

 long setae dorsally. Third segment of uniform thick- 

 ness except at base and at apex, where it is for a short 

 distance narrowed ; it bears a single stout microsegment 

 with small apical spine. 



Head, anterior aspect : Face below antenna less than 

 one-fourth the head width, barely divergent below. 

 The face bears a single row of long, conspicuous, stout 

 bristles along the epistomal margin, slanting obliquely 

 downward. Also above on the lower half of the face 

 there is a subtriangular, medial group of 12 fine, stiff 

 bristles or bristly hairs; otherwise the face is micro- 

 pubescent. Front barely wider than upper face, 

 convergent again at the vertex. The front bears a sub- 

 ocular row of 5 long, slender hairs. Vertex moderately 

 excavated, the ocellarium large and protuberant but not 

 high, its sides rounded; it bears behind the ocelli 3 

 pairs of quite stout, long, erect, divergent bristles; 

 ocelli quite large and visible in profile. 



Thorax: The mesonotum rather convex anteriorly 

 with a single, fine, scanty row of suberect acrostical 

 elements ; there is also a wide, bare stripe on either side 

 and longer, fine, dorsocentral hairs; 1 or 2 posterior 



