ENTOMOLOGICAL JOURNAL. 103 



PERIODICAL WORKS (now in course of publication). 



J-:dir<tr*lx, }}'. II. Butterflies <>1 'North America. Colored plates. Commenced 1868. 



Annul** (It- la Soi-ictc entoatologk}ll6 de Franco, Paris. Commenced 1832. 



Truii*u*-ti<>n* of tin- Kntomological Society of London. Commenced 1834. 



/, Insi'fto/oi/ii' Ai/r'K'ole, Monthly Journal, Paris. Commenced 18G7. 



Ziitninj. Kntomotogische Verein, .Stettin. Commenced 1840. 



Liiniu'u ditoi/ioloijicu. Entomologischo Verein, Berlin. Commenced 1846. 



Zi-it.n-hrift. Kntomologische Verein, Berlin. Commenced 1857. 



Annul*'* de la societ ; entomologique Beige, Brussels. Commenced 1857. 



I'm, -ni/iii//* ol' the Academy ol' Natural Sciences, Philadelphia. Commenced 1819. 



Jiinniu/ of the Academy of Natural Sciences, Philadelphia. Commenced 1817. 



Trun*u<'ti*>n* of the American Philosophical Society. New Series. Commenced 

 1818. 



1'i-tii-i-i'ifiiif/K of the Boston Society of Natural History. Commenced 1834. 



./nitfii il of the Boston Society of Natural History. Commenced 1834. 



.liiiiul* of the Lyceum of Natural History of New York. Commenced 1824. 



/ro'-odinu* <ni*l Trun*u*'tion.x of the American Entomological Society, Philadel- 

 phia. Commenced 1801. 



Proceeding* and Communications of the Essex Institute, Salem. Commenced 1848. 

 X.itttrtdist, Salem. Commenced March, 18G7. 



ENTOMOLOGICAL JOURNAL. Every collector should keep a 

 daily journal of his captures and observations, noting down 

 every fact and hint that falls under his notice. In this book, 

 commenced as soon as the season opens in early spring, can 

 be placed on record the earliest appearance, the time of great- 

 est abundance, and the disappearance of e"very insect in any of 

 its stages. Also the descriptions of larvaj, with sketches, and 

 observations upon their habits ; though drawings had better 

 be kept upon separate pieces of paper for easier reference. 

 The insects, when captured and unnamed should be numbered 

 to agree with corresponding numbers in the note-book. At 

 the close of the season one will be surprised to see how much 

 material of this kind has accumulated. He can then make a 

 calendar of appearances of perfect insects and larvae, so as 

 to have the work of the next season portioned out to him ; 

 he will thus know when and where to look for any particular 

 insect or caterpillar. 



THE NUMBER OF SPECIES OF INSECTS. Oswald Heer estimates 

 that the Insects comprise four-fifths of the whole animal king- 

 dom. While there arc about 55,000 species of animals known, 

 excluding the Insects, the number of this last single class 

 amounts to upwards of 190,000 known species, according to 



