BY FREDERICK A. A. SKUSE. 629 



beneath, and the posterior two pairs with a very small brown spot 

 laterally at the apex ; tibiae cinereous ; tarsi and tibial spurs 

 black. In the fore-legs the tarsi three times the length of the 

 tibite ; the metatarsal joint somewhat longer than the tibiae. 

 Wings pellucid, with a fascia across the middle, and the apex pale 

 brownish ; brilliantly iridescent ; veins dark brown. First longi- 

 tudinal vein joining the costa opposite a point before the tip of 

 the posterior branch of the fork of the fourth longitudinal vein ; 

 tips of the branches of the latter and the anterior branch of the 

 fork of the fifth longitudinal vein pale ; sixth longitudinal reaching 

 nearly to the base of the fork of the fifth. 



Hah. — Sydney and Hogan's Brush, Narara Creek, near Gosford, 

 N.S.W. (Skuse). June to August. Fifteen specimens. 



171. Brachydicrania fumosa, Sk. 



B. fuinosa, Sk., l.c , p. 1218. 



In fresh specimens the thorax and abdomen are black, the third 

 to sixth abdominal segments being more or less distinctly marked 

 anteriorly at the sides with ochreous. 



172. Brachydicrania abbreviata, Sk. 

 B. abbreviata, Sk., I.e., p. 1219. 



Sydney (May to December), numerous specimens (Skuse) ; 

 Dunoon, Richmond River, N.S. W. (Helms), in March and April. 

 The ochreous markings beneath the segments vary considerably. 



Genus Synplasta, gen.nov. 



Head roundish, the fore part compressed, situated deep in the 

 thorax ; front broad, the anterior border only very slightly pro- 

 duced in the middle. Eyes longish-round. Ocelli two, tolerably 

 large. Palpi prominent, incurved, four-jointed ; first joint very 

 small ; second short, robust ; third about twice the length of the 

 second ; fourth very slender, about equal in length to all the 

 others combined. Antennae porrected, somewhat arcuated, 2-4- 14- 

 jointed ; joints of scapns cupuliform, the second slightly larger 



