314 ME. W. V. KIEBT — A EEVISION OF 



female : wings short, rounded, pterostigma small, twice as long as broad ; fore 

 wings with 5 antenodal nervures and 4 postnodal nervuves, the first postnodal not 

 continuous, cells of the postnodal area simple, triangle converted into a trapezium, 

 free, followed by two rows of cells, no supratriangular nervures, subtriangular space 

 consisting of one rather large cell, sectors of the arculus stalked, upper sector angulated 

 before the middle, lower basal cell with one cross nervure, the nodal sector a little 

 waved at the base, the subnodal nearly continuous, and the intermediate cells simple, 

 upper sector of the triangle rising on all the wings about the middle of its outer side ; 

 hind wings broader than the fore wings, with 4 antenodal and 4 postnodal nervures, 

 the first postnodal not continuous, triangle free, followed by two rows of cells ; no 

 supratriangular nervures, one cross nervure in the lower basal cell : anal appendages 

 of the male slender, as long as the eighth segment, lower appendage nearly straight, 

 as long as the others ; appendages of the second segment not very prominent. 

 Type Fi/lla exigua, sp. n. 



PAET IV. 

 Descriptions of New Species. 



Hydrobasileus vittatus. (Plate LI. fig. 10.) 

 Tramea quadrivittata, Hag. MS. 



Long. corp. 47 millim. ; exp. al. 76 millini. ; long. pter. 3 millim. 



Male. — Head dull red, the upper part of the front deeply excavated below the frontal 

 ocellus, and blackish ; rhinarium also black. Thorax reddish above ; pleura yellowish 

 green, with black sutural lines. Abdomen with transverse carinas on the first three 

 segments, which are red, with black dorsal and lateral carinse and sutures, beyond this 

 point black extends more and more over the abdomen, till on the sixth segment there 

 are only two red dots in the middle and a small red streak on each side, the remaining 

 segments (above) and appendages are quite black ; on the under surface the abdomen is 

 black, with a long pale yellow stripe on each side of all the segments. Anal appendages 

 about as long as the last two segments, upper appendages arched and bristly, lower 

 appendage nearly as long as the others, stout, conical, and slightly curved up at the 

 tip. Wings rather long and narrow ; fore wings with 16 antenodal (one super- 

 numerary) and 8 postnodal nervures; pterostigma rather short and broad, reddish, 

 covering one and a half cells, triangle long and moderately broad, with two transverse 

 nervures, followed by four cells in the first row, and then by three ; wings reddish 

 hyaline, with reddish-brown nervures, and a rusty brown band running across the 

 wings just within the nodus, not quite reaching the hind margins nor (in the hind 

 wings) the costa ; membranule blackish, slightly bordered with white ; base of the 

 inner margin of the hind wings with a rusty brown blotch. 



Hah. Menado, Celebes ( Wallace), 



