170 0. JR. Osten Sacken: 



In the abovequoted paragraph of tlie Europ. Dipteren, Loew 

 speaks of a Ct. nigrita Brülle. Such a species does not exist, and 

 the name merely appears as a slip of the pen in Macquart's Hist. 

 Nat. Dipt. I, 79, instead of nigrofasciata Brülle. 



3. I take ßavieornis (W.) Meig. for the same as ruficornis. 

 Meigen, who had not seen this species, merely reprodnces Wiedemann's 

 description, who had a specimen from Megerle in Vienna which he 

 believed to be from Austria. But the species does not seem to have 

 been found anywhere since, and Schiner know nothing about it; the 

 only local list of Diptera in which I find a mention of C. flavicornis 

 is Mr. Puls's untriistworthy list of diptera of the environs of Berlin 

 (Berl. Ent. Z. 1864, Appendix). — About this list compare the uu- 

 favorable opinion of Gerstaecker, Entom. Bericht 1863 — 64, p. 405. 



4. Ctenophora dorsalis Walker is represented in the Brit. Mus. 

 by a male and a female; Ct. succedens by a Single female, Avhich is 

 the same as the female of dorsalis, It seems probable that this 

 species holds the same relation to the canadian Ct. atrata (see above), 

 as Ct. ruficornis holds to the european atrata. I am not quite sure 

 of the identity of Ct. dorsalis with my frontalis, as I have but an 

 indistinct recollection of the latter. 



5. P. fumiplena. 



Ctenophora fumiplena Walk. Ins. Saund. p. 449. 



Very variable in the color of the body and wings, the yellow 

 sometimes prevailing over the black. Walker described the black 

 variety. 



Body deep veivet-black, including the antennae; second abdominal 

 Segment orange-red, except the bind margin, which is black; often 

 the orange-red color appears on the sides of the third, fourth and 

 even of the following Segments, but always with a more or less large 

 black, generally triangulär spot on the bind margin, and also some 

 black on the' sides. Legs black, with white rings at the base of 

 the tibiae; sometimes the base of the femora is more or less yellowish. 

 Wings brown, sometimes pale-yellow at the base; a pale yellow cross- 

 band between the anterior margin and the fifth vein is connected 

 with a pale yellow spot on the posterior margin at the end of the 

 anal cell; this crossband crosses the distal end of the 'basal cells, 

 but does not reach (distad) beyond the central crossveins. The cross- 

 band is often dissolved in several disconnected spots; sometimes these 

 Spots are very small, and in some specimens they disappear altogether 

 and then the wing is uniformly brown. The legs are black with 

 white rings at the base of the femora. 



Hab. China. 



