54 LIST OF DIPTERA. 



tinge ; veins dark brown ; brands none ; poisers pale yellow, their 

 knobs darker. Length of the body 2\ lines ; of the wings b\ lines. 



a. England. From Mr. Walker's collection. 



Div. F F. 



The first and the second longitudinal veins are simple; the 

 third has a short cross vein, which joins the fourth ; the fourth has 

 no areolet, but is forked near its tip ; the fifth, soon after one-third 

 of its length, sends forth a branch, which at first forms a very acute 

 angle with it, but afterwards bends downwards and joins the fourth 

 vein : during its course it sends forth three branches ; the first of 

 these is forked, and there has also a very short branch, which rejoins 

 the fifth vein ; the second and the third are simple. 



Limnobia diuturna, n. s., mas. et fem. Cinerea, thoracis lateribus 

 pectoreque fulvis, antennis nigris, pedibus fuscis, tibiis fulvis 

 apice fuscis, fem. pedibus fulvis, femoribus tibiisque apice tar- 

 sisque fuscis, alis subfuscis. 



Male, — Body gray : eyes and feelers black, the latter tawny at 

 the base and shorter than the chest: chest and breast tawny; disk 

 of the former gray : tip of the abdomen tawny : legs brown ; shanks 

 dark tawny, with brown tips : wings slightly tinged with brown ; 

 brands pale brown ; veins and poisers brown. Fem. — Legs tawny ; 

 feet, and tips of thighs and of shanks, brown. Length of the body 

 2 lines ; of the wings 5 lines. 



a. England. From Mr. Walker's collection. 



Div. G G. 



The first and the second longitudinal veins are simple; the 

 third has a short upright cross vein, which joins the fourth before 

 the middle of the areolet on the latter ; the fourth has two short up- 

 right cross veins, which form the sides of the oblong areolet, and 

 from the middle of the second of these a branch proceeds to the tip 

 of the wing ; the fifth, soon after one-third of its length, sends forth 

 a branch, which at first is slender and forms a very acute angle with 

 it, but is afterwards stouter and inclines downwards, and joins the 

 fourth vein by a zigzag course : during its passage it sends forth 

 three branches ; of these, the first is forked, the second and the third 

 are simple, and the latter forms the upper side of the areolet before 

 mentioned. 



