Mr. F. W. Edwards on British Limnobiidae. 197 
This manuscript was already completed when I received 
Messrs. Goetghebuer and Tonnoir’s “Catalogue raisonné 
des Tipulidae de Belgique” (Bull. Soc. Ent. Belg. II, 1920, 
pp. 104-112 and 131-147, pls. i, u, and EEL oa pp: 
47-58). In this work a number of species which I had 
figured as new are also described and figured; but since 
my figures give different views of the same structure they 
have been retained. 
DIcRANOMYIA. 
Since some of the species of this genus were inadequately 
studied or inaccurately described by Verrall, and since 
moreover there are a number of additions to be made, 
a fresh table of the British species will not be out of place. 
The table has purposely been made without reference to 
the male hypopygium, but it should be noted that in some 
cases the species which are most alike in other characters 
are the most easily distinguished when reference is made 
to this organ. 
1. Se, extending considerably beyond the base of Rs. Kasei 
2 Sc, ending nearly opposite base of Rs. : : tae 
2, Largish species; wing hairy on apical half . pilipennis Egg. 
Small species; wing bare; discal cell open é aquosa Verr. 
3. Se, close to tip of Sc, (frons silvery; wings spotted) 
dumetorum Mg. 
Se, far before tip of Se, . ‘ : i ; : peer. 
4. Wings conspicuously spotted : ; C : +k Be 
Wings clear, or with stigma only (cross-veins and base and 
apex of Rs more or less clouded in D. chorea) é vj, 3s 
5. Cua about its own length before base of discal cell ornata Mg.w” 
; Cu,a close to base of discal cell : A . : “6. 
6. Veins R, and Cu yellow, the rest dark; Cu usually with small 
“. dark spots along it. : ; , goritiensts Mik. ’ 
Veins all dark, at least Cu not noticeably yellow . ii 
7. Mesonotum shining yellowish, with a black longitudinal stripe ; 
2 wing-tip conspicuously darkened; no dark spot in middle 
a of Se " 3 ; : fi F : lucida Meij. ¥ 
= Mesonotum dull brown, unstriped; wing-tip but little dark- 
+ ened; a dark spot in middle of Se ; . _ didyma Mg. 
ee 8. Mesonotum not all shining black; frons dull ’ # 9. 
ihe Mesonotum, or at least the praescutum and scutum, entirely 
SS shining black; frons silvery 18. 
