266 THE ENTOMOLOGIST. 



The great value of Esper as a work of reference is that he des- 

 cribed and figured so many types of species. His figures are 

 fairly good and nearly always recognisable. Catalogued at from 

 £10 to £12 10s. (1912). Eecently the price has greatly increased 

 and it is now catalogued at from £25 to £30. A second edition 

 of this work was brought out by T. von Charpentier in 1829-39. 

 The disadvantage of this edition is that the plates, though 

 usually considered equal to the original edition, are not, of 

 course, coloured by or under the supervision of Esper. This 

 edition is usually priced a little lower than the original one. 



Fischer, J. E. (von Roslerstamm). Abildungen zur Berichtigung 

 und Erganzung der Schmetterlingskunde besonders der micro- 

 lepidopterologie ; 100 coloured plates ; Leipzig, 1838. The 

 plates of this work are very beautiful. It was catalogued in 

 1912 at £4 and £5 10s. 



Frey, H. Die Lepidopteren der Schweiz ; 1 vol., 454 pp. ; Leipzig, 

 1880. An extremely useful work dealing with both macros 

 and micros. It should be in the hands of every student and 

 especially those who visit Switzerland. It can usually be 

 purchased second-hand for 5s. or 6s. 



Freyer, C. F. Beitrage zur Geschichte Europaischer Schmetter- 

 linge ; 3 vols. ; 144 coloured plates ; Nuremberg, 1828-30 ; 

 and Neure Beitrage zur Schmetterlingskunde ; 7 vols. ; 700 

 coloured plates ; Augsburg, 1833-58. These works have very 

 beautiful plates, and those of the larvae especially, of which 

 large numbers are figured, are very useful. The former work 

 was catalogued in 1912 at from £2 5s. to £3 and the latter at 

 from £11 to £14. 



Frolich, G. F. A. Enumeratio Tortricum Wurtembergise ; 1829 ; 

 102 pp. An extremely useful little book for students of the 

 Tortricidse, catalogued in 1912 at 3s. 



Gerhard, B. Monographic der Lycaenen ; Hamburg, 1853 ; 39 

 coloured plates. In this monograph the plates are good. 

 As it figures and names a number of aberrations of the Euro- 

 pean Lycaenidse it is essential to all students of that group. 

 Catalogued in 1912 at £3 5s. and £3, 15s. 



Heinemann, H. Schmetterlinge Deutschlands und der Schweiz ; 

 2 vols. ; Brunswick, 1859-76. Essential to all microlepidop- 

 terists. Catalogued in 1912 at £3 15s. to £5 10s. The value 

 of this book is increasing in consequence of its rarity. 



Herrich-Schafler, G. A. W. Systematische Bearbeitung der 

 Schmetterlinge von Europa ; 6 vols. ; 636 coloured and 36 

 uncoloured plates ; Regensburg, 1843-1856. This magnificent 

 continuation of Hiibner's " Sammlung " is one of the most 

 important works ever issued on the subject. The plates are 

 very beautiful and even the smallest species figured is easily 



