104 DIPTERA OP AUSTRALIA, 



Rostrum short, arched in front, shorter than the head, much 

 shorter in L. trivittata ; nasus distinct, obtuse, pubescent ; palpi 

 with the first three joints sub-equal, the second more or less 

 incrassated, the fourth joint long and flagelliform. Antennae 

 short, the length of the head or a little longer, the joints with 

 minute hairs ; 10-jointed in both sexes ; first joint of the scapus 

 cylindrical, about three times the length of the second ; flagellar 

 joints progressively diminishing in width from sub-globose to 

 linear. Front broad, slightly gibbose anteriorly above the an- 

 tennae. Collare slightly prolonged into a neck. Thorax large and 

 gibbose ; suture distinct ; abdomen less than twice the length of 

 the thorax, narrow and compressed from the sides in the ^ ; I'obust 

 and clavate in the 2> with the second segment truncate-conical, 

 the third to fifth narrow, increasing in width, the rest narrow, 

 diminishing; genitalia in both sexes inconspicuous. Legs very long 

 and very slender, especially the hind pair ; the tarsi more than 

 twice the length of the tibiae ; tibia armed with a pair of short 

 spurs ; ungues small, hooked, smooth ; empodia small, but dis- 

 tinct. Wings divaricate ; shorter and narrower in ^ than in the 

 ^ ; anal angle prominent in 5, not so distinct in the ^. Auxiliary 

 vein reaching costa about opposite inner end of first submarginal 

 cell; first longitudinal vein joining anterior branch of second 

 longitudinal near its origin, forming an arcuation with the ulti- 

 mate section of the branch ; second postorior cell petiolate ; discal 

 cell longer than wide, pentangular, in punctiform contact with 

 the fifth posterior cell at about the middle of its length. 



410. Leptotarsus Macquarti, Guerin. (PI. v., fig. 15.) 



L. Macquarti, Guerin, Voy. de la Coquille, Dipt. p. 286, pi. xx, 

 fig. 1, 1838 ; Tipula tricincta, Walker, List Dipt. Brit. Mus. I, 

 p. 73, 1848. 



(J. — Length of antennae 0'065 inch ... 1-66 millimetres. 



Expanse of wings 0-940 x 0-180 ... 23-86 x 4-56 



Size of body 0-680x0-150 ... 17-26x3-81 



