A Guide to the Literature of British Diptera. 101 
Ent. Mo. Mag., x). pp. 164-173, 194-199, 223-228, 241-245 (1904); 
xli. pp. 51-57, 81-83, 108-112, 167-172, 189-196, 248-252 (1905). In 
this useful paper analytical keys are given for the determination of 
all the genera and species, also full details of distribution. 
Other papers which may be consulted with advantage are— 
214. Hauipay, A. H.: The Characters of two new Dipterous genera 
(Orphnephila and Macheriwm), with indications of some generic sub- 
divisions and several undescribed species of Dolichopidz. Zoo/og. 
: Journ., vol. v. pp. 350-368 (1830-31). 
215. VERRALL, G. H.: List of British Dolichopide. nt. Mo. Mag., 1x. 
pp. 71-74 (1872-73). 
216. VERRALL, G. H.: Notes on some British Dolichopodide, with descriptions 
of new species. Ent. Mo. Mag., xii. pp. 31-35, 142-148, 195-198, 
245-248, 268-270 (1875-76). 
217. Woop, J. H.: Thrypticus nigricauda, a New Species; and notes on a 
few other Dolichopodide from Herefordshire. nt. Mo. Mag., xix. 
pp. 268-270 (1913). 
LONCHOPTERID Ai. 
See general works, Nos. 4 and 8. 
CYCLORRHAPHA. 
SYRPHIDA (Hover-flies). 
The best general account of this Family is contained in the volume by 
Verrall (No. 6). 
The following may also be consulted :— 
218. Harpy, JAMes: Memoirs on Scottish Diptera. No. 1. The Sow Thistle 
Stem-boring Fly (Cheilosia chalybeata, Meig.). Scot. Nat., i. pp. 177-180 
(1871-72). 
219. VERRALL, G. H.: Notes on some British Syrphi. Znt. Mo. Mag., v. 
pp. 7-8 (1868). 
220. VERRALL, G. H.: On the European Species of Syrphus allied to 
_  S. ribesti. Ent. Mo. Mag., v. pp. 190-194 (1869). 
221. VERRALL, G. H.: On the British Species of Platychirus, including four 
species new to Britain. nt. Mo. Mag,, vii. pp. 127-130 (1870). 
222. VERRALL, G. H.: List of British Syrphide. nt. Mo. May., vi. 
pp. 173-176 (1870). Additions and Corrections, op. cit. vii. pp. 200-203 
(1870-71); ix. pp. 251-256, 281-286 (1872-73). 
223. VERRALL, G. H.: On the British Species of Chilosia. Ent. Mo. May., 
vi. pp. 203-207 (1870). 
