94 stUatiomtid^;. 



cylindrical, 3rd with eight ambulations, 1st the largest, about as 

 large as 2ud scapal joint, remainder annular, slightly narrowing 

 in width towards tip. Proboscis and palpi short, latter not extend- 

 ing beyond epistoma. Thorax subquadrate, corners rather angular, 

 rather broader behind. Scutellum fully semicircular, convex, 

 unarmed. Abdomen longer and slightly wider than thorax, ovate, 

 with tip rather pointed, 8-segmented ; genitalia small. Legs simple, 

 moderately long and strong. Wings with normal Berid venation; 

 2nd vein rather sharply upturned towards tip ; anterior branch of 

 3rd vein nearly erect ; only three endings to 4th vein ; discal cell 

 large, hexagonal ; anterior cross-vein just beyond base, posterior 

 cross-vein at about the middle ; anal cell large, closed a long way 

 before border. 



Range. Europe, India, America. 



No previous description of the genus appears to have been 

 given. Loew placed certain new species in what he took to be 

 Metoponia, Macq., but Osten-Sacken in pointing out his mistake 

 merely renamed Metoponia, Lw., as Allognosta, without character- 

 ising it, as he had no specimens available of the genus at the 

 time. * 



In A. vagans the legs are all black except at the knees; in 

 A. assamensis the anterior femora and middle tibiae are yellow. 



63. Allognosta vagans, Lw. (PI. I, figs. 25, 26.) 



Metoponia vayans, Loew, Bescli. Europ. Dipt, iii, p. 71 (1873). 

 Allognosta inermis, Brunetti, Rec. Incl. Mus. vii, p. 455 (1912). 



S ■ Read with vertex very small, occupied by the three ocelli ; 

 eyes with uniform, very small facets, bare, contiguous; irons an 

 equilateral triangle, moderately large, blackish seen from above, 

 but with grey reflections viewed from other directious ; occiput 

 blackish. Antennae black, normal, as in Beris ; the 3rd joint 

 with seven annular impressions, appearing as if composed of eight 

 closely compressed joints. Palpi and proboscis black; the under- 

 side of the large labella yellowish. Thorax and scutellum blackish, 

 ■with a slight aeneous tinge, microscopically roughened, and with 

 microscopic yellow hairs; the anterior margin and shoulders with 

 a very little short yellowish hair, which extends also over the 

 pleurae to some extent. Scutellum unspined, with microscopic 

 yellow hairs. Abdomen dull black, barely shining, the sides with 

 very short yellow hairs; venter similar, with very minute yellow 

 hairs. Genitalia consisting of a pair of blackish, fairly thick 

 claspers, each with a small narrow appendage ; there being also 

 an upper pair of yellow, hairy, finger-like appendages. Legs 

 black, the knees distinctly but not broadly yellowish brown ; 

 pulvilli pale yellowish. Wings blackish brown ; stigma large, 

 well defined, brown ; halteres black. 



* As to the supposed identity of Metoponia, Macq.. and Metoponia, Ltt., see 

 Brunetti, Rec. Ind. Mus. vii, p. 455. 



