168 Miss G. Ricardo on the Pangoninaa 



DiATOMINEURA, Rond. 



Subgenus Corizoxeuea, Rond. 

 Wings with first posterior cell open. Eyes bare, 



Corizoneura taprohanes, $ , Walker, List Dipt. pt. v. Suppl. 1, 

 p. 324 (1854). 



The type in the Museum is var. b ; the other is not to be 

 identified. 



The palpi are small ; the second joint thick at base, tapering 

 to a point, shorter than the first joint. Wings have an 

 apj:)endix on fork of third longitudinal vein. 



liab. Ceylon, Nilghiri Hills {Hampden). 



Corizoneura longirostris, S ? > Hardw. Trans. Linn. Soc. xiv. ; 

 Wiedem., Auss. zweifl. Ins. ii. p. 621 (1830) ; Walker, 

 List Dipt. pt. i. p. 131 (1848) ; Rondani, Canestr. Archiv. 

 per Zool., Anat. e Fis. iii. (1863) ; Roder, Stett. ent. 

 Zeitschr. xliii. p. 384 (1881). 



The males have the prolongation on fore tarsi as in some 

 African species. Roder mentions it. One or two of the 

 females have long bristles on these joints. The first posterior 

 cell is closed in some of the females with a short petiole. 

 Two males, one of which was wrongly labelled " amboinensis, 

 Fabr.," seem a variety of this species, having no prolongation 

 on the fore tarsi ; the third joint of antennse is bright red, not 

 black. The yellow colour on the abdomen is more promi- 

 nent ; the face is shining and dark, with hardly any greyish 

 pubescence. 



Bab. North-west India ; Muktesar, North-west Provinces 

 {lAngard) ; Thibet {Landor). 



A merica. 

 Pangonia, Latr. 



North America. 



The species north of Mexico are placed first, and lastly 

 those south of the North Mexican boundary, following Osten 

 Sacken's arrangement in his Cat. of North-American Diptera, 

 1878 ; but the species from the AA^est Indies are placed under 

 South America. 



