On the Bats of the Rhinolophus arcuatus Gt'oiij). 281 



from base of radial area, apical areas eiglit ; wings with six 

 aj)ical areas. 



Type, D. truncafella, Walk. (Cicada). 



The principal characters of this genus are to be found in 

 the structure of the tegmina. 



Ahricta Elseyi, sp. n. 



Head black, tlie front castaneous, tlie ocelli and a central 

 spot at base of vertex ochraceous ; pronotum pale castaneous, 

 with a central longitudinal ochraceous fascia, which is much 

 ampliated posteriorly and a little so anteriorly, posterior 

 margin more or less piceous ; mesonotum ochraceous, with 

 four obconical castaneous spots, of which the two outermost 

 are much the largest and occupy the whole lateral areas, 

 cruciform elevation castaneous; abdomen castaneous, greyishly 

 pilose ; body beneath and legs castaneous, greyishly pilose, 

 head beneath (excluding face) black ; tegmina and wings 

 hyaline ; tegmina with the veins and costal membrane 

 lu'ownish ochraceous ; wings with the venation ochraceous, 

 the whole anal area pale golden yellow, posteriorly margined 

 with fuscous ; rostrum passing the intermediate coxaj ; 

 opercula in male obliquely directed inwardly, but scarcely 

 extending beyond base of abdomen. 



Long., excl. tegm., ^ 19 mm. ; exp. tegm. 60 mm. 



Hah. North Australia : Victoria lliver [Br. J. R. Elsey, 

 Gregory Exploration Exped., Brit. Mus.). 



Allied to A. ruber, God. & Frogg., but tegmina apically 

 unspotted, different colour of head and anal area to wings, 

 shorter ulnar areas to tegmina, &c. 



XXX. — On the Bats of the Rhinolophus arcuatus Group, ivith 

 Descriptions of Five neiv Forms. By Knud Andersen. 



General Characters of the Group. 



Brief diagnosis. — Median anterior nasal swellings large 

 and abruptly projecting. Sella approximately ovate in shape. 

 Tail much shorter than tibia. 



Skull. — ChieHy characterized by the large, almost semi- 

 globular, and strongly projecting median nasal swellings. 

 Palatal bridge rather short, between ^ and ^ the length of 



An7i. cC- Mag. N. IlisL iScr. 7. Vol. xvi. 19 



