Tabanidae of the Australian Region. 269 



mentary ; all posterior cells open, but the fourth is narrower 

 at the border. 



Demoplatus, gen. nov. 



Formed for the male type named Corizoneura trichocera 

 by Bigot; females are now to hand which are identical with 

 this male. There are also three male specimens of evidently 

 another species of this genus, which are described below ; 

 and there are two males of different species apparently from 

 Brisbane and Mackay in the Brit. Mus. Coll. which I do not 

 propose to describe. 



The species are distinguished in the females by the club- 

 shaped palpi and by the broad concave forehead, in the males 

 by the very hairy face, palpi, and antenna, in both by the 

 rather flat abdomen and large wings. Ocelli large and 

 distinct. Spines on hind tibiae. Antenna with at least eight 

 divisions on the third joint, having a short first joint, the 

 second one only half its length, the third very slender, com- 

 posed of a small almost square first division, the following 

 ones very small and narrower. The females may be distin- 

 guished by the smaller club-shaped palpi and by the face, 

 which is very much produced under the antennas, almost 

 reaching the upper border of the first antennal joint. 



The genus is allied to Ectenopsis in the shape of the fore- 

 head iu the female ; but is at once distinguished from it by 

 the very much larger palpi, and in the male by the larger 

 first antennal joint, which with the second joint is very 

 much more hairy. 



Demoplatus trichocerus, £ ? , Bigot, Mem. Soc. Zool. de 

 France, v. p. 010 (1892) [Corizoneura']. 



Type (female) from Herberton, Queensland (Dodd), in 

 the German Ent. Museum, and another female in the same 

 collection from Kuranda, Queensland. 



Type (male) from Australia in the Yerrall Coll. and two 

 other males from Kuranda and Herberton in German Ent. 

 Museum. 



A reddish-brown species, with the cross-veins of the pale 

 brown wings shaded dark brown. Legs honey-yellow or 

 reddish yellow. 



Length, females 12-13 mm., males 12-13 mm. ; proboscis 

 hardly more than 1 mm. 



Female. — Face Sudan-brown, very short, tuberculous in 

 centre, some black bristly hairs on the outer borders, iu the 

 groove dividing the face from the cheeks. Beard consists of 



