ecclxiv Proceedings of the Asvat. Soc. of Bengal. [Nov. 1918. 
in each family now known (including the 70 new Tipulidae 
of the second paper just issued). Cecidomyidae, 30; Myceto- 
philidae, 70; Blepharoceridae, 4; Bibionidae, 33; Simuliidae, 
14; Chironomidae, 340; Culicidae, 360; Psychodidae, 40 ; Dia- 
dae, 5; Tipulidae, 600; Rhyphidae, 8; making a total of about 
1,640 or nearly double the number known only seven years 
oO. 
Coming to the Brachycera the results are not so striking 
in the aggregate, but there remains ample scope for further 
research in all the families. 
Stratiomyidae.—Thorough revision is required here as badly 
as anywhere. Some of the genera appear unsound and many 
of Walker’s specific descriptions, especially in critical groups 
such as Sargus, Ptecticus, Odontomyia, Evaza, etc., are unrecog- 
nisable, a large number of the species having been set up from 
one sex only and frequently from unique specimens, a good 
many of the types being no longer in existence. De Meijere 
has elucidated some of the older authors’ species from Java. 
Only about 20 new species have been described since 1896 but 
in a second revision that I am attempting sixteen or more 
additional ones will appear. 
Leptidac.—Only about a dozen or so new species have 
been added to this rather limited family but I have descriptions 
in MS. of at least as many again of undescribed species in 
the British Museum, Indian Museum and Pusa collections which 
will appear in the 2nd volume of the ‘‘ Fauna” series. Bezzl 
has worked out the Formosan species.!’ ; 
abunidae.—The very extensive family of gad flies 18 
abundantly represented in the East. Van der Wulp’s Catalogue 
contains close on 200, of which 150 belong to the gigantic genus 
Tabanus. There is still scope for much revisionary work here. 
Most of Bigot’s species of Atylotus (sub-genus of Tabanus) do 
not belong there, in fact he failed to understand the sub-genus, 
as was the case in other instances, and many of his descriptions 
are as unintelligible as those of Walker’s later days. A larg 
proportion of the family has not been dealt with by Miss 
Ricardo though she has compiled two lengthy and very useful 
Papers, one on Tabanus only and the other on the remaining 
genera, over sixty new species being included in them.? Studies 
comparative, that is, differences from closely allied species 
must be noted. A collection of some size for continuous con 
parison is also a sine qua nén for exhaustive work, 280 4 
complete library of all the described species of the region. 
Apart from Miss Ricardo’s work practically nothing has trans- 
pired during the last two decades. 
1 Ann. Mus. Hung. X, 442 (1912) 
2 Rec. Ind. Mus. IV, III (1911); LV, 321 (1911). 
