94 Proceedings of the Royal Physical Society. 
PTYCHOPTERIDA and DIXxID&. 
No special literature on these Families exists. The life-histories of 
Ptychoptera and Diva are dealt with in No. 70. 
SIMULIDA (Sand-Flies). 
The literature on this group is at present limited, but the supposition 
that Pellagra is conveyed by these flies will, no doubt, soon result in 
increased attention being paid to them. 
The best memoirs on the British species are— 
135. Epwarps, F. W.: On the British species of Simuliwm. I. The Adults. 
Bull. Ent. Research, vi. pt. 1., pp. 28-42 (1915). 
136. Epwarps, F. W.: The British species of Stmuliwm (Diptera). nt. 
Mo. Mag., li. pp. 305-309 (1915). 
The following may also be consulted :— 
137. Taytor, T. H.: On the Tracheal System of Stmuliwm. Trans. Ent. 
Soc. Lond., 1902, pp. 701-716. 
188. Hewitt, C. Gorpvon: Simuliwm Flies and Pellagra. Nature, \xxxv. 
p. 169 (1910): 
For life-history see also No. 70. 
ORPHNEPHILID®. 
No special literature. 
PsycHoDID® (Moth-Flies). 
The best systematic account of the British species is— 
139. Eaton, A. E.: A Synopsis of British Psychodide. nt. Mo. Mag., vol. 
Xx1x. pp. 5-8, 31-34, 120-130 (1893); vol. xxx. pp. 22-28, pls. i.-iv. 
(1894); Supplement, vol. xxxi. pp. 208-213, 245-250 (1895); vol 
xxxli, pp. 70-76, 127-131, 202-211 (1896); vol. xxxiit, pp) TPe125 
(1897) ; vol. xxxiv. pp. 117-125, 154-158 (1898). 
As a further Supplement to this valuable paper sue author still further 
improved his classification in the following :— , 
140. Eaton, A. E.: New Genera of European Psychodide. Znt. Mo. Mag., 
vol. xl. pp. 55-59 (1904). 
141. Eaton, A. E.: Telmatoscopus rothschildi, a new Species of Psychodid 
Diptera found in London. nt. Mo. Mag., vol. xlviii. pp. 7-9 (1912). 
For structure and life-history the following are the most important :— 
142. Miaut, L. C.: The Life-history of Pericoma canescens (Psychodide), 
with a bibliographical and critical appendix, by Baron Osten-Sacken. — 
Trans. Ent. Soc. Lond., 1895, pp. 141-153, pls. 1i1., iv. 
143. Det, J. A.: The Structure and Life-history of Psychoda sexpunctata, 
Curtis. Trans. Ent. Soc. Lond., 1905, pp. 293-311. 
