fro-m the Philippine Islands. 227 



Ptilona); 3. six bristles on the scutel]um, the intermediate pair being 

 smaller (Ptilona has only four); 4. the tip of the first vein is in the 

 middle or beyond the middle of the distance between the tips of the 

 auxiliary and second veins (it is before that middle in Ptilona); 5. the 

 section of the third vein before the anterior crossvein is microscopically 

 bristly (glabrous in Ptilona). 



Mr. V. d. Wulp has noticed the probable relationship between 

 Ptilona and Rioxa (Tijdschr. etc. XXIII, 183, at the bottom), and some 

 of the above-qiioted difFerences (No. 1 and 4) have been indicated by 

 him in the description of his Ptilona sexmaculata ; 1 infer therefrom, 

 that P seocmaculata would be better placed in the genus Eioxa. 

 Rioxa, on account of the presence of a praesutural bristle, would seem 

 to be nearer to Trypeta (in the sense of Meigen), than Ptilona. Prof. 

 Rondani (Ann. Mus. Civ. Gen. VII, 436) has described some species 

 of Eioxa from Borneo. 



There is a small species Trypeta paritii Dol. 1 Bijdr. 10, Tab. I, 

 f. 2, (I have little doiibt that it is the same as T. modesta Wied. 

 A. Z. II, 496), ') which, in the design of the wings, resembles a Ptilona, 

 But it has a praesutural bristle, 6 long bristles on the scutellum and 

 the third vein microscopically bristly. From Rioxa it diflFers in having 

 the arista plumose on both sides, the first longitudinal vein shorter, 

 third antennal Joint shorter; the general shape of the body is also 

 difi^erent. T. paritii is a true Trypeta, in Meigen's sense, although 

 I would hesitate to place it in any one of the existing subdivisions. 



Rio CG a sp. A fragment*of a male; the species is difi'erent from 

 the preceding. 



Trypeta melaleuca Wk. J. Fr. Lin. Soc. VII, 238. (North 

 Ceram; Comp. 0. S. Enum. 71). Belongs in the Subg. Acidia. 



Trypeta Elimia Wk. Listete IV. 1033 (Philippine Islands). 

 The description is recognizable; the locality being the same, the iden- 

 tification is certain. Ortalis regularis Dol. 3 Bijdr. 47 (Amboina) is 

 the same species. 



Trypeta stellata (Syn. Acinia stellata Macq. D. E. Suppl. IV, 

 293; Manilla). I have seen the type in Mr. Bigot's collection. Macquarfs 

 short description does not quite apply, unless ,, bände dorsale brune" 

 is read in the plural, and not in the singular, and „base jaunätre" is 

 put, instead of brunätre. T. stellipennis Wk. J. Pr. Lin. Soc. IV, 159 



^) The ,, Borste ungefiedert" in Wiedemann does not agree; but is 

 that Statement correct? 



