viii ADDITIONAL NOTES (1903) 



Page 235. Dr. Sharp in the Cambridge Natural History, Insects, 

 Vol. II., p. 425, quotes the following descriptions of the larva of 

 Acentropus : " Disque, Ent. Zeit. Stettin, li. 1900, page 59. Cf. also 

 Rebel, Zool. Jahrb. Syst. xii. 1898, p. 3." I am indebted to Dr. 

 Sharp's work also for pointing out an error in the figure of the spiracles 

 of Dytiscus (fig. 12, supra), which has now been corrected. The work 

 in question is an invaluable repertory of information respecting insects 

 of all kinds, of which much greater use would have been made, had 

 it existed when this book was written. 



Page 251, near bottom. Further information about the curved spine 

 is supplied by Prof. G. Gilson, On Segmentally disposed Thoracic 

 Glands in the Larvce of the Trichoptera. Linn. Journ., Zool., Vol. 

 xxv. page 407 (1896). 



Page 271, footnote 2. This larva, which is that of Oithocladius, a 

 sub-genus of Chironomus, is described and figured by Mr. T. II. 

 Taylor in Miall and Hammond's Harlequin-fly, pp. 14-19. 



I ought to have mentioned in the original preface that Mr. Hammond 

 contributed several original drawings from his own preparations, and 

 that the accounts of Chironomus, Ptychoptera, Simulium and 

 Stratiomys in particular were much improved thereby. 



