igii.J G. RiCARDO : The Oriental Tahanidae. 365 



4. Face concave in the middle .. Rhinomyza, Wied. 

 Face not concave in the middle . . • • 5 



5. Third joint of antennae with an acute spine on the iirst 



annulation , . . . Gastroxides , Saunders. 



Third joint of antennae simple . . . . 6 



6. Second joint of antennae shorter than the first joint. 



Wings usually hyaline . . Silviits, :\Ieigen. 



7. Second joint of antennae as long or nearly as long as the 



first joint. Wings usually with a black or brown 

 design . . . . Chrysops, Meigen. 



The genus Myctcromyia, Philippi, is not included in the table 

 owing to the uncertainty of the genus and of the one species re- 

 corded from India. 



PANGONIA, Latreille. 



This genus was subdivided by Rondani into four genera : 

 Pangonia and Erephopsis with the first posterior cell closed, Dia- 

 tomineura and Corizonetira with it open. The only genus as yet 

 represented in the Oriental Region is Corizoneura with two species, 

 not including the doubtful Pangonia amboinensis , Fabr. 



Corizoneura longirostris, Hardwicke. 



Trans. Linn. Soc. London, xiv, p. 135, pi. vi, fig. 5 — 6 (1823) 

 {Pangonia) ; Wied., x\uss. zweifl. Ins., ii, p. 621 (1830) {Pangonia) ; 

 Gay in Griffith's Cuvier Anim. King., xv, pi. cxiv, fig. 3(1832) 

 {Pangonia) ; Macq., Ann. Soc Entom. France, vi, p. 429, pi. xv, 

 figs. 20 — 23 (1837) {Pangonia) \ Roder, Stett. Entom. Zeitg.. 

 xlii, p. 384 (1881) {Pangonia): Ricardo, Ann. Mag. Nat. Hist. 

 (7)' V, pp. 167 and 168 (1900). 



Pangonia with yellow hairs, thorax ferruginous, abdomen 

 black-brown ; margins of segments yellow, wings unspotted (pi. 

 vi, figs. 5 and 6). Rostrum about twelve times longer than the 

 head. Antennae approximated at the base, short, consisting of 

 three pieces, the two lowest of which are very small, the upper 

 one long, tapering to a point, and composed of eight small articu- 

 lations. Eyes large, very prominent. Head and thorax very hairy 

 both above and beneath, longer under the throat ; of a bright yellow 

 beneath, brownish above. Wings longer than the abdomen, hya- 

 line ; costal nerves brown. Body black ; the margins of each seg- 

 ment shining, the sides hairy. Halteres short, having the shafts 

 yellow and the knobs ovate, black. Length of the insect from the 

 base of the rostrum to the apex of the abdomen ten lines; and of 

 the ro.strum two inches and a half. Hardwicke, Trans. Linn. Soc. 

 London, xiv, p. 135. Hardwicke's figure of wing has the first 

 posterior cell very narrow, but not quite closed at border. 



Gay, in Griffith's Cuvier Anim. Kingdom, xv, p. 696, pi. 

 cxiv, fig. 3, gives in the figure of P. longirostris the wing with the 



