BY FREDERICK A. A. SKUSE. 103 



yellow; intermediate and hind pairs black. Femora black, 

 yellow at the base. Tibise considerably longer in ^ than in 

 9, with the anterior half and the base black. Wings shorter and 

 considerably narrower in ^ than in J, black at the base ; 

 cinereo-fuscous (a paler brownish tint in old specimens), paler 

 behind the humeral cross-vein ; veins black or deep brown. 

 Second posterior cell with a short petiole ; discal cell oblong, 

 pentangular, a little shorter than fourth posterior cell, in puncti- 

 form contact with fifth posterior cell. 



ffab. — Melbourne, Victoria (Westwood) ; Sydney and Lane 

 Cove, two 9 specimens (Masters) ; Lawson, Blue Mountains, 

 N.S.W., one (J specimen (Mr. H. Prince). 



Obs. 1. — At first sight I took the above-mentioned ^ specimen 

 to belong to LepfMarsus on account of the extraordinary length of 

 the tarsi; the anterior tibiae are 8 lines and the tarsi 20 lines ; the 

 posterior tibiae 9 lines and the tarsi 22 lines. In the 9 the 

 anterior tibiae measure 8 lines and the tarsi 14 lines ; the posterior 

 tibiae 9 lines and the tarsi 15 lines, 



Obs. 2. — This species is easily distinguished from the last by 

 its plain wings and difi'erent body-markings. 



Genus 11. Leptotarsus, Guerin. 



Le])totarsus, Guerin, Voy. de la Coquille, Dipt. p. 286., 1838; 

 O.-Sacken, Studies I, p. 181, 1886. 



Fir.st longitudinal vein joining the anterior branch of the second 

 longitudinal near the base, its tip, with the ultimate section of the 

 branch, forming an arcuation ; praefurca as long or a little longer 

 than the great cross-vein ; second posterior cell petiolate. Front 

 broad, slightly gibbose anteriorly. Rostrum short, about the 

 length of the head, arched in front, with a distinct, obtuse nasus. 

 Antennce 10-jointed, as long as or but little longer than the head. 

 Palpi tvith the last joint long, flagelliform. Genitalia in both 

 sexes inconspicuous. 



