354 
ZOOLOGICAL LITERATURE. 
ground that the greater or less complication of the venation of the wings 
does not furnish sufficient characters for this purpose. As the basis of his 
classification he adopts the structure of the thorax, which in Terphis, Phi- 
lopottty and 2'hyllis has the prothoracic lobes so greatly developed as to meet 
above, separating the prothorax from the mesothorax, which is also extra- 
ordinarily developed. These form one subfamily. The other forms, in 
which this structure of the thorax does not occur, are divided into 2 groups, 
the Acrocerince, with the 3rd joint of the antennas usually short, and always 
provided with a terminal seta, and the Panopince, in which this joint is long, 
or very long, and never furnished with an apical bristle. This arrangement 
is shown in the following table : — 
1. AcROCERiNiB. a. Proboscis abbreviated or 0 : O geodes, Acj'oeer a, IIolops, 
? Spheerops, Opsebius. h. Proboscis elongate : Cyrtus, Psilodcra, P Spheero- 
yaster. 
2. PANoriNiB. a. Proboscis abbreviated : ? Pterodontia, Pialea, Astomclla, 
? Apdleia, P Physoyastcr, Ocncea, P'piccrina. h. I’roboscis elongate : 
Pteropexus, Panops, Lasia, Eulunchus. 
8. Philopotinje. a. Proboscis abbreviated: Terphis. 1. Proboscis elon- 
gate : Philopota, Thyllis. 
Schiner records 103 described species, distributed as follows : — in Europe 
22, Asia 4, Africa 13, America 57, Australia 0 ; 1 species of unknown origin. 
Spheeroyaster is the only genus peculiar to Europe. Nine genera are exclu- 
sively American j of 12 species oi Phihpota,\\ are American. Psilodera is 
peculiar to Africa, and Pauops and Epicerina to Australia. 
Holops frauenfeldii, sp. n., Schiner, Reise der Novara, Zook, Dipt. p. 143, 
Chili. 
Lasia superha, sp. n., Schiner, 1. c. p. 143, Chili. 
Philopota semidneta, sp. n., Schiner, /. c. p. 144, South America. 
Therevidas. 
Schiner (Reise der Novara, Dipt. pp. 145-146) remarks as follows upon 
some of the proposed genera of this family: — Pahuda (Walk.) is to be 
transferred here from the BombyliidiB, Chiromyza (Wied.) belongs to the 
Xylophagidae, ixiAEeuterayonista (Phil.) to the Einpidae. Baryphora (Loew) 
and Cionophora (Egger) are referred to Xestomyza ( Wied.) j Cyclotelus 
(Walk.) = Ayapophytus (Gu6r.) j Eimassus (Walk.) = Ectinorhynchus 
(Macq.), with which also Ayapophytus may be identical. Of 159 described 
species, 50 inhabit Europe, 23 Asia, 15 Africa, 31 America, and 2(5 Australia, 
whilst of 7 species the native county is unknown. Thereva is the most 
widely distributed genus. 
Neiv species : — 
Psilocephala stiymaticalis, Schiner, 1. c. p, 146, P. proxima, Schiner, 1. c. 
p. 147, and P. dives, Schiner, ibid.. South America. 
Anaharhynchus luridus, Schiner, 1. c. p. 148, Auckland; A. caleeatus, 
Schiner, 1. c. p. 149, and A. lonytis, Schiner, ibid., Sydney. 
Ectinorhynchus superbus, Schiner, 1. c. p. 150, and E. viduus, Schiner, ibid., 
Sydney. 
Phycus dioctriceformis, Schiner, 1. c. p. 151, Sydney. 
