DASTPOGONINAB 



ROBBER FLIES OF THE WORLD 



187 



pile anteriorly, posteriorly and ventrally. This tibia 

 has 8 anterior bristles, 8 anterodorsal, a like number 

 of posterodorsal and 7 or 8 long posterior, and 4 long 

 ventral bristles. Anterior femur with 3 anterior bris- 

 tles on the basal half and with moderately long pile on 

 all surfaces and with 2 or 3 bristles anteriorly at or near 

 the apex. Anterior tibia with 11 anterodorsal bristles 

 besides shorter elements in front of them, 6 or more dor- 

 sal, 4 or 5 posterodorsal, 7 posterior and 3 ventral 

 bristles at the middle and beyond. Apex without 

 spine. Tarsi end in slender, sharp claws curved from 

 the base. Pulvilli extend to the outer third of the claw ; 

 empodium of the same length, rather stout basally. 



Wings: All cells of the wing open widely except the 

 anal cell which is narrowly open. The anterior cross- 

 vein enters the discal cell at or just beyond the middle; 

 the second basal cell ends in 3 veins, the middle vein 

 long. Alula a little wider than the costal cell, the am- 

 bient vein is well developed to the anal cell, continues 

 throughout the remainder of the wing, though reduced. 



Abdomen : The abdomen is unusually broad and ro- 

 bust and wider than the thorax ; it is rather flattened 

 in the middles of the anterior tergites. There are seven 

 tergites in the male, the seventh and the eighth nearly 

 equal in length and each half as long as the sixth. 

 Females with eight tergites, the last two also of equal 

 length and slightly shorter than the sixth. Pile of the 

 abdomen minute, appressed and setate over the middle 

 of the tergites, forming long, matted, appressed fringes 

 laterally on the posterior margins of the tergites and 

 also tufts of pile extend outward from the posterior 

 corners. Sides of the first tergite with several pairs of 

 weak bristles and middle of the lateral portion of the 

 second tergite with a row or patch of weak, short, ap- 

 pressed bristles. Male terminalia short, broad, and 

 arched downward as in Acnephahnn Macquart and not 

 rotate. The gonopod has a sharp, terminal spur. 

 Female with 6 pairs of long, spatulate, apically 

 rounded, spoonlike spines and several ventrolateral 

 bristles. 



Distribution : Palaearctic : Crohilocems megillifor- 

 misLoew (1847). 



Genus Anarolius Loew 



Figures 84, 528, 1003, 1004, 1868 



Anarolius Loew, Stettiner Ent. Zeitung, vol. 5, p. 165, 1S44. 

 Type of genus : Anarolius juoatus Loew, 1844, by monotypy. 



Medium size flies with wide, strongly gibbous face re- 

 sembling Cyrtopogon Loew. They are bristly and 

 densely long pilose with all wing cells open. They are 

 recognized by the long, slender, sharp claws, which have 

 no associated pulvilli, and by the dense, exceptionally 

 long face pile and the tufted, manelike pile on the 

 posterior half of the mesonotum. Length 12 to 15 mm. 



Head, lateral aspect: The face is strongly produced 

 and gibbous, beginning immediately beneath the an- 

 tenna; the whole face is convex and domelike. Eye 

 subtriangular, being greatly narrowed below and also 



strongly anteroventrally recessive, beginning at a point 

 representing the upper fourth along the posterior mar- 

 gin. The occiput is exceptionally thick and tumid and 

 in addition its apparent thickness is greatly increased 

 by the recession of the eye. Pile of occiput long, 

 dense, fine and matted on the ventral half, replaced 

 in the middle by a wide band of exceptionally long, 

 fine, bristly pile. Bristles begin at the upper third of 

 the occiput, where they are set deep medially, are few 

 in numbers but quite stout and pale and consist of 11 

 pairs. In addition there is considerable exceptionally 

 long, fine, vertical pile. Proboscis short, robust, mod- 

 erately widened towards the base from the dorsal 

 aspect and bluntly rounded at the apex and directed 

 either forward or downward; it bears numerous long, 

 stiff hairs at the apex, these hairs extend back ventrally 

 along the apical third and with a lateral, subbasal 

 tuft of 3 or 4 long, oblique, distinctly bristly hairs 

 and with a dense, extensive basal ventral patch of long, 

 stiff pile. Palpus long and cylindrical, the first seg- 

 ment short, excavated, fused medially; the second seg- 

 ment nearly six times as long as the first, with long, 

 dense pile. The antenna is attached at the upper 

 third of the head, elongate and exceptionally slender; 

 the first and second segments are short, of equal length 

 and robust, especially the first. The third segment 

 is considerably more slender than the second and with 

 microsegment included, it is more than twice as long 

 as the first two segments combined. The third seg- 

 ment is very slightly widened on the outer half. The 

 microsegment is thick, long and stylelike with a long, 

 apical spine; it is a little more than one-third the 

 length of the third segment. 



Head, anterior aspect: The face below antenna is 

 more than one-third the head width, with nearly paral- 

 lel sides. The vertex is one-half the head width. Sub- 

 epistomal area of moderate size, slightly oblique, 

 concave, well concealed by dense, long pile. Face 

 pubescent, except over the middle bristle-covered por- 

 tion. There is a narrow, submarginal band on the 

 sides of the face bearing some short pile. The greater 

 portion of the wide face is, however, beginning beneath 

 the antenna, covered with an exceptionally dense band 

 of long, slender, bristly hairs or weak bristles. These 

 extend far beyond the proboscis and some of them 

 beyond the antenna. Below the pile becomes even 

 more dense, pale and less bristly in character within 

 the type of genus. In other species there is a com- 

 paratively narrow, fanlike band of the slender bristles, 

 or bristly hairs extending the full length of the face 

 and enclosing within a dense, vertical band of pile. 

 Similar long pile and some bristles continue thickly 

 down the sides of the subepistoma. The front is short, 

 with a large tuft of long, slender, bristly pile which 

 is continuous with similar pile on the vertex. The 

 antennae are set rather far apart. The vertex is 

 greatly widened and bears laterally dense tufts of long, 

 bristly pile. It is very little excavated near the eyes, 

 although the large, low ocellarium is set within a mod- 

 erately deep depression and bears 4 or 5 pairs of long, 



