INTRODUCTION. 1 7 



Discobola 0. Sacken, Proc. Entomol. Soc. Pkila. 1865 (Limnobina, sya. 



Trochobola). 

 Paratropeza (L. anomala). , ^.^ yerh> Zoq1 Bot> Gesellsch< in 

 Cloniophora (Limnophilina). ^ w . lg66 

 Peripheroptera (Lhnnobina). J 



Thaumastoptera Mik, Verh. Z. B. G., etc., 1866 (Limnobina anomala). 

 Macrothorax Jaen. Sclir. d. Senkenb. Ges. (Tipulina). 

 Rhicnoptila Now. Verb. Zool. Bot. Ges. in Wien, 1867, p. 337 (Limno- 



pbilina). 

 Trochobola (Limnobina). 

 Orimarga (Limnobina anomala). 

 Atarba (id.). 



Sigmatomera (Eriopterina). 

 Empeda (id.). 

 Mesocyphona. *> 



Acyphona. > Subgenera of Eriopterina. 



Hoplolabis. J 

 Ulomorpha (Limnopbilina). 



Plectromyia. j Amalopina . 



Genera and subgenera 

 adopted in tbe present 

 volume. 



Rhaphidolabis. 



4. Division of the Tipulip^e into longipalpi and brevipalpi. 



Some Tipulidde have the last joint of the palpi much longer 

 than the three preceding taken together, whiplash-shaped, almost 

 reaching the fore coxae in the living insect. Others have this 

 last joint hardly longer, or even shorter, than the two pre- 

 ceding taken together, cylindrical or subcylindrical and not 

 whiplash-shaped. If we exclude the small and anomalous groups 

 of the Ptychopterina and the Cylindrotomina, this division of 

 the Tipulidse in longipalpi and brevipalpi will, upon examina- 

 tion, prove natural enough, and supported by a considerable 

 number of subsidiary characters. Among the brevipalpi the 

 genus Pedicia is the only one which has the last joint of the 

 palpi rather long (nearly once and a half the length of the three 

 preceding joints taken together), and this induced Latreille, 

 when he established this genus, to place it among the longipalpi. 

 In all other respects, the position of Pedicia among the brevi- 

 palpi is not in the least doubtful. 



Besides the structure of the palpi, the following are the charac- 

 ters which may be used as tests for determining the relationship 

 of doubtful forms with either of the two divisions. Some of 

 these characters, perhaps all, may not be of universal occurrence 

 2 May, 1868. 



