Studies on Tipulidae. 155" 



The Tipulidae brevipalpi are divisible into several sections," 

 based on tolerably well-defined characters. Ever since the introduc- 

 tion of this division in 1859 very few doubtful, or intermediate forms 

 have been discovered. Different in this from the brevipalpi, the 

 bulk of the Tip. longipalpi, composed of the genera Tipida and 

 Pachyrrhina , form a compact mass of the same relationship. The 

 specialized groups existing alongside of that section of Tipuli na 

 are few in number and numerically weak, and it is difficult to dis- 

 cover available characters for the definition of these groups. 



Thus the Ctenophorina and Dolichopezina, as groups, are 

 perceptible to the entomological sense onlj^, but it is a question dependent 

 on further research whether they will be maintained as sections or 

 not. South-America and Australia contain many abnormal and little- 

 known forms of Tipulidae the relationship of which is as yet obscure ; 

 until we know more about them, the subdivision of the Tip. longi- 

 palpi must remain in suspenso. 



In the present paper I have endeavoured to sum up my actual 

 knowledge of the Classification of the Tipulidae longipalpi, as 

 I have acquired it from the existing literature and the collections. 

 I Claim the reader's indulgence and beg him to remember, in perusing 

 these pages that they were compiled from disconnected notes, taken 

 in different times and at different places, and in most cases, in the 

 absence of any specimens. I have divided my paper into the follo- 

 wing paragraphs: 



1. On Dolichopeza and its relatives. 



2. On Ctenophora and its relatives. 



3. On the australian Tipulina with pectinate antennae and espe- 

 cially on the genus Ptilogjaia Westw. 



4. On the South American Tipulina with pectinate antennae. 



5. On the australian genera Leptotarsus Guer. and Semnotes 

 Westw. 



6. On the Tipulina in the narrower sense (Tipula, Pachyrrhina etc.) 



I. On Dolichopeza and its relatives. 



{Scamboneura 0. S., Äpeilesis Macq., Megistocera "Wied., 

 Tanypremna 0. S. and Brachypremna 0. S.) 



Dolichopeza and a small group of little known exotic genera 

 are distinguished by the extreme length and slenderness of their legs, 

 (especially of the tarsi), and the light and delicate structure of their 



