198 C. R. Osten Sacken: Diptera 



Anaeropsis Bigot, Ann. Soc Entom. Fr, 1866, 201, as I have 

 shown in my note on the Diptera with an Achias-like development of 

 the head, Ann. Mus. Civico di Genova 1882, Vol. XVIIl, is a true 

 Micropezid, closely related to Nestiina. Not having seen any females, 

 I cannot tell, whether they have the same extraordinary structure of 

 the head, but I am inclined to doubt it. — Type: Anaeropsis hor- 

 qidni Bigot. 1. c, Island Waigiou (Synonym: Phytalmia <]uttipennis 

 Walker, J. Pr. Lin. Soc. V, 269; New Guinea.) The species not being 

 a Phytalmia, will have to be called Anaeropsis guttipennis Walker, 

 Mr. Walker's description being earlier. 



Tacniaptera Macq. , S. a B. II. 491, was without necessity 

 suppressed by Macquart himself in the Dipt. Exot. II, 3, p. 240. As 

 Loew has shoven (Loew, Beschr. Eur. Dipt. Ill, 255, and my Catal. 

 N. Am. Dipt. 2** edit. p. 259), it is the same as Tanypoda Rond. 

 (Rainieria Rond. olim) and the european Calob. latifrons and calceata, 

 as well as a large number of exotic species, muss be referred to it. 

 The true Taeniapterae from Southern Asia that I have seen, have the 

 following characters in common, in which they diflper from the european 

 Calobatae (sensu stricto): a microscopically pubescent, sometimes sub- 

 glabrous arista not incrassate at the base; no transverse swelling on 

 the upper part of the metanotum; the labella rather stout; a fringe of 

 minute stiff bristles at the extreme front end of the fore coxae; a fringe- 

 shaped row a bristles on the pleura, above the middle-coxae; a rather 

 long and brod ovipositor of characteristic shape; a well-developed cly- 

 peus; nearly obsolete tegulae with an almost imperceptible fringe of 

 cilia; an oblique anal cell; the posterior crossvein and the tip of the 

 second vein are at nearly the same distance from the apex of the wing 

 (or, if the latter is nearer, it is less than twice as near as the posterior 

 ci'ossvein). 



The eight species from South-Eastern Asia, which I mention below 

 as Taeniapterae, all have white front tarsi, and the wings banded with 

 brown. If I do not finally adopt Taeniaptera as a generic name, it 

 is because there are several species which are neither Taeniapterae, 

 nor Calobatae in the narrower sense, but about which I do not know 

 enough to introduce for them separate genera. For this reason I con- 

 tinue to maintain the genus Calobata in the widest sense, as I did in 

 my EniMneration. 



The following table give a survey of the grouping of the genera 

 of Micropezidae, as far as I can establish it upon my scanty materials. 

 The american genus Cardiacephala is omitted, because I do not 



