frorn the Philippine Islands. 85 



,,that the Philippines once formed part of the great Malayan extension 

 ,,of Asia, but that they were separated considerably earlier than 

 „Java and having been since greatly isolated and much broken iip 

 ,,by volcanic disturbances, their species have for the most part been 

 ,,modified into distinct local species" 

 (Compare also Wallace, Geogr. Distrib. of Animals, I, 345 — 349). 



The scrutiny of the small collection before me reveals in some 

 groups traces of a rather striking specialization ; but whether they will 

 be sustained by further discovery, is still a question. I have been 

 especially Struck by the peculiar characters of the Tipulidae: the two 

 species of Libnotes, described by me, have a peculiar coloring, diflFerent 

 from that of the eleven known species of the same genus from other 

 parts of South Eastern Asia. Eriocera is a genus abundantly represented 

 in all the tropical regions of Asia and America, but most of the species 

 have only four posterior cells; among two dozen described Eriocerae 

 from S. E. Asia only five species have five posterior cells, Now, both 

 species, which I describe from the Philippine Islands, have five 

 posterior cells. The Ctenophorae (Tipulidae) from the Islands also 

 have some peculiarities in common. 



As far as regards the genera, it is the famiJy Ortalidae that 

 seems to be the most specialized. I have been obliged to introduce 

 in it not less than four new genera, all of them remarkable forms, 

 not known before (Antineura, Philocompus, Xenaspis,Naupoda). 

 The other new genera introduced by me are: 



Scamboneura (Tipulidae), which also occurs in Amboina; 



Eurybata (Micropezidae) , represented in Amboina by a closely 

 allied form, which I provisionally refer to the same genus. 



Notopsila (Ortalidae), merely a new name for Pachycephala 

 Dolesch,, which is preoccupied. It likewise occurs in Amboina, and is 

 closely related to the Australian Euprosopiae. 



Asyntona (Ortalidae) from Amboina; I have described it on 

 account of its relationship to Naupoda. 



That the Islands, especially the Northern parts of Lu9on, have 

 some points in common with China is very probable, but hardly possible 

 to ascertain now, on account of the insuflficient knowledge of the Chinese 

 fauna. Such points of contact between the two faunas have been shown 

 to exist in the Lepidoptera (Compare the article of Mr. George Semper 

 in the Stett. Entom. Zeit. 1875, p. 409.) I have not been able to 

 obtain data on the other Orders of insects. 



In the course of this paper I have used the terminology for the bristles, 

 parts of the thorax etc. adopted by me in my recent paper: An Essay 

 of comparative Chaetotaxy (Mitth. Münchener Entomol. Vereins, Vol. V). 



Heidelberg, Germany, January 1882. C. R. 0, S. 



