CONTENTS. Vll 



Page 

 Art. XXXII. Monographia Hydrcenarum Angliie. By George 



R. Waterliouse, Esq 292 



Art. XXXIII. On the Existence of "Natural Genera." By 

 Alexander William Griesbach, Esq. B. A. of Trinity College, 

 Cambridge 296 



Art. XXXIV. Notice of Entomological Works 301 



Art. XXXV. Varieties 309 



Art. XXXVI. On the Death of Latreille 320 



Art. XXXVII. CoUoquia Entomologica 321 



Art. XXXVIII. Essay on the Classification of Parasitic Hymenop- 



tera, &c. By A. H. Haliday, Esq. M. A 333 



Art. XXXIX. Observations on Ignis Fatuus. By George Wailes, 



Esq 3.50 



Art. XL. Observations on the Influence of Locality, Time of 

 Appearance, &c. on Species and Varieties of Butterflies. By 

 J. C. Dale, Esq. M. A. F. L. S 355 



Art. XLI. On the Structure of the Antennae in the Order Apha- 

 niptera of Kirby, with reference to the Propriety of the 

 Establishment of Genera upon the Variations of those Organs. 

 By J. O. Westwood, Esq. F. L. S., &c 359 



Art. XLII. Observations on Blight. By Rusticus, of Godalming . 363 



Art. XLIII. Monographia Chalcidum. By Francis Walker, Esq. 



F.L.S 367 



Art. XLIV, Notes on the Habits of Insects. By Delta .... 385 



Art. XLV. Establishment of the Entomological Society of London, 390 



Art. XLVI. Osteology, or External Anatomy of Insects. By 



Edward Newman, Esq. F. L. S 394 



Art. XLVII. Entomological Notes. By Edward Newman, Esq. 



F.L.S 413 



Art. XLVIII. Notice of Entomological Works 417 



Art. XLIX. Varieties 421 



Art. L. Observations on Blight. By Rusticus, of Godalming . . 425 



Art. LI. Entomological Sapphics. By Rusticus, of Godalming . . 432 



Art. LII. Exposure of the Fallacy of the Septenary System in 



Natural History 434 



Art. LIII. Notes on the Habits of Insects. By Delta 439 



Art. LIV. The Learned Fleas 443 



