462 Mr. W. F. Kirby on the 



Icon. R. Anim., Ins. p. 384, pi. lxi. Eg. 1 (1829-1844) ; King, Abhandl. 

 Akad. Berl. 1836, p. 93. n. 4 ; Ramb. Ins. Nevr. p. 336 (1842). 

 Nematoptera externa, Westwood, Proc. Zool. Soc. Lond. 1841, p. 11. 

 n. 4 j Ann. & Mag. Nat. Hist. viii. p. 397. n. 4 (1842). 



Hob. Baghdad. 



Genus III. Chasmoptera, gen. nov. 



Antennas very thick ; beak prominent : hind wings only one 

 and a half times as long as the fore wings ; fore wings hyaline, 

 except a slightly marked pterostigma; hind wings wholly 

 dark except at the extremity and on the median line in the 

 middle of the principal lobe, which expands very broadly on 

 each side, occupying the third quarter of the wing ; at the 

 .base it expands gradually, and at the extremity it is trun- 

 cated, the angles, however, being rounded off; from the 

 central line a number of bifid nervures diverge on each side. 

 This is followed by a second smaller lobe on each side, and a 

 broad terminal projection, white on the apical half. 



*21. Chasmoptera Huttii. 



Nemoptera Huttii, Westwood, Proc. Ent. Soc. Lond. v. p. 27, pi. viii. 

 tig. 1 (1847) ; Hagen, Proc. Boston Soc. Nat. Hist, xxiii. p. 265. 

 n. 12 (1888). 



Ha b. Australia (Perth, Swan River). 



Genus IV. Savigniella, n. n. 



\\Brachystoma, Rarnbur (nee Meigen), Ins. Nevr. p. 337 (1842). 



Mouth not produced into a beak ; hind wings long, linear, 

 scarcely enlarged towards the extremity. 



22. Savigniella costata. 



, Savigny, Descr. Egypte, Neur. pi. ii. fig. 14 (details). 



\\Nemoptera halterata, Oliv. (nee Forsk.) Encycl. Meth. viii. p 178 



(1811). 

 Nemoptera costata, Klug, Abhandl. Akad. Berl. 1836, p. 94. n. 7. 

 Nemoptera Olivieri, Rainbnr, Ins. Nevr. p. 337 (1842). 

 Nematoptera Olivieri, Westwood, Proc. Zool. Soc. Lond. 1841, p. 13 



n. 14 ; Ann. & Mag. Nat. Hist, viii. p. 379. n. 14 (1842). 



Hab. Alexandria. 



Hagen considers Savigny 's fig. 13, usually referred to this 

 species, to represent Halter Ledereri, Selys. 



