BY FREDERICK A. A. SKUSE. 759 



lopis 2], It is interesting to note in all sections the occurrence of 

 genera common to North America and Europe ; and from this we 

 are led to surmise that very probably many other generic forms 

 prevalent in these two continents also have Australian exponents. 



Six Australian species have been characterized by former 

 authors, chiefly by Walker, under the generic title Limnohia, but 

 not one of these is a Limnohia ; two belong to Trimicra^ one to 

 Gnophomyia, two probably to Limnoj^hila, and one to Amalopis. 

 The species of Gnoj)homyia above referred to is Limnohia 

 fascipennis, Thorn., described from a female example ; Baron 

 O.-Sacken subsequently described the male of the same species 

 under its correct generic name, but as G. cordialis (Studies 11.^ 

 p. 199, 1887). 



Section I. LIMNOBINA.^ 



*' One submarginal cell ; four posterior cells. Normal number 

 of antennal joints fourteen (sometimes apparently fifteen). Eyes 

 glabrous. Tibia? without spurs at the tip. Ungues with more or 

 less distinct teeth on the underside. Empodia indistinct or none." 

 (Osten-Sacken). 



A very natural group, including less than a dozen genera, four 

 at least of which, Dicranomyia, Geranomyia^ Limnohia and 

 Trochohola are cosmopolitan. No species of Limnobina have yet 

 been described from Australia ; a fair number are now charac- 

 terized for the first time, amounting altogether to about one- 

 fourth of the Tipulidse brevipalpi herein enumerated, a proportion 

 which obtains also in the North American and European faunas. 



* For further important particulars about the sections and genera, it is 

 necessary that the student should consult the full descriptions by Baron 

 O.-Sacken extant in his Monograph of the N. American Tipulidse brevi- 

 palpi, also the subsequent observations in his " Studies on Tipulidse," parts 

 I and II., published in the Berhner Entom. Zeits., 1886 and 1887 ; without 

 which an adequate knowledge of the groups cannot be expected, but 

 liability to serious blunder certainly the consequence. 

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