82 CONTENTS OF EACH VOLUME. 
of which included the material obtained by the Editors of the present work. Asin 
Vol. I., the species, excepting the Tettigine, likely to occur in Mexico or Central 
America are included in the enumeration. Altogether 663 species are regarded 
as belonging to the fauna, although in many cases, owing to lack of material, there 
is at present no actual record from within the limits of Central America. The 663 
species are apportioned thus: Acridiide, including the 26 Tettigine, 522 (138 new) ; 
Phasmide 141. The Index to the two volumes occupies pp. 379-412 in Vol. II. 
‘The eight uncoloured plates (four for each family) include figures of 120 species, some 
of which are Nearctic or Neotropical forms closely related to those known to inhabit 
Central America. 
BOTANY. 
53. Vol. I.: by W. B. Hemsley, with a Commentary on the Introduction and Appendix 
by Sir J. D. Hooker. 
This Volume contains the enumeration of the Polypetale, Ranunculacee- 
Ayaliacese, which was issued in 1879-1881; the Preface, Introduction, and ‘Com- 
mentary ’ appeared in October 1888, on the completion of the entire subject. When 
this took place, the temporary titlepage and the Index to Vol. I. (pp. 577-619), 
issued in October 1881, were both replaced in October 1888, the former by a titlepage 
to include notice of the ‘Commentary’ by Sir J. D. Hooker, and the latter 
by a general index for the whole of the four Volumes of text, this appearing in 
Vol. IV. pp. 833-498, 1887-1888. In the Introduction, pp. ix—lxi (issued in 1888), 
Mr. Hemsley deals with geographical distribution under the following headings: 
(1) Statistics of the Phanerogamic Flora of the world; (2) Statistical comparison of 
the Floras of large and widely separated areas; (3) Generic and specific composition 
of the Floras of different areas; (4) The distribution of some of the largest Natural 
Orders; (5) The Primary Botanical regions of the World considered in their relations 
to the Zoological regions; (6) Comparison of the Zoological with the Botanical 
regions; (7) Outlying Australian types of vegetation; (8) Botanical division of the 
earth into primary regions. Sir J. D. Hooker in his ‘Commentary on Mr. Hemsley’s 
Introduction and Appendix to the Botanical part of the Biologia Centrali-Americana’ 
(pp. lxii-xlviii) also gives his own views on the Botanical kingdoms, under these 
headings: (i.) The North Temperate Kingdom of the Old World; (ii.) The Tropical 
Kingdoms of the Old and New World; (iii.) The three Southern temperate regions 
(Extratropical America, Africa, and Australia). 
54. Vol. II.: by W. B. Hemsley. 
The Gamopetale, Caprifoliacee—Plantaginee, are dealt with in this Volume. The 
temporary titlepage and the Index to Vol. II., pp. 577-621, both issued in June 
