20° AN ACCOUNT OF BRITISH FLIES. 
i. Lemocera. ii. LVemocera anomala. 
Cecidomyide. Bibionidee. 
Mycetophilide. Simulide. 
Culicidee. Blepharoceridz. 
Chironomide. Rhyphide. 
Psychodide. Orphnephilide. 
Tipulide. 
Dixidee (?). 
iil. Lremocheta. 
Stratiomyide. 
Tabanide. 
Acanthomeride. 
Leptide (plus Xylophagide). 
The family Xy/ophagide must be given up and united to the 
Leptide. 
As we receive more material from the tropics and foreign parts 
we shall continually find it necessary to alter the classification. The 
old classification has been adopted to suit European forms; but as 
the numerous anomalous forms from Chili and North America have 
shown that the present classification will not hold good, we may 
expect still further changes when new material is brought from 
Australia, Africa, and other places, where the Dipterous fauna is 
scarcely known, It is by the study of exotic forms that we shall 
eventually arrive at a satisfactory classification, and only by this 
means, In a letter we received from Mr. Coryndon Mathews we 
are told as follows: ‘Only a month or two ago Major Yerbury sent 
me a box of flies from Trincomali, Ceylon, for identification, and 
amongst some fourteen or fifteen Asz/id@, there was material enough 
to upset three of Schiner’s and Rondani’s genera.” 
The immense importance of the study of foreign species in regard 
to the classification of flies is thus emphasised; and until we are 
well acquainted with the Dipterous fauna of all parts of the globe 
we Shall still be in the same changeable and unsatisfactory state in 
regard to their systematic arrangement. 
For the present we cannot do better than follow Brauer’s arrange- 
ment, especially as it has been adopted in the only list of British 
species, 
ae, eo 
ee PN eee ee es ag eee. 
