76° CONTENTS OF EACH VOLUME. 
Aves, was greatly delayed by the ill health and death of Salvin, in 1898; but he lived 
long enough to assist in completing the enumeration of the species of nearly all the 
families, with the exception of those of the subfamily Pamphiline of the Hesperiide, 
i. é. to p. 460 of Vol. LI. 
Amongst the numerous papers on Neotropical Butterflies that have been published 
since the conclusion of Vol. II. (in 1901), one by Mr. H. H. Druce (P. Z. 5. 1907, 
pp. 566-632, pls. xxxi—xxxvi.) contains a revision of certain Central-American species 
of the genus Thecla. 
39-41. Leprpoprera Hurerocers. Vols. L., IL. (:ext), I11. (plates): by Herbert Druce : 
Sphingidee—Pyralide. 
Vol. I. of this subject, published in 1881-1891, the Introduction excepted, contains 
an account of the following 22 families of Moths :—Sphingide, Castniide, /Egeriide, 
Agaristide, Zygenide, Arctiide, Chalcosiide, Lithosiide, Melameride, Dioptide, 
Liparide, Saturniide, Lasiocampide, Limacodide, Bombycide, Drepanulide, Psychide, 
Cosside, Hepialide, Notodontide, Noctuide, and Deltoide. Vol. II., published in 
1891-1896, includes the Euschemide, Uraniide, Geometride, Siculide, and Pyralide ; 
and a very extensive Supplement, pp 298-569, issued in 1896-1899, embraces all 
the families contained in both Volumes, another family, the Arbelide (pp. 449, 450), 
being added. The author, in his Introduction to Vol. I., published in 1900, states 
that in 1880 less than 400 species of Heterocera had been recorded from Central 
America against the 3639 enumerated in these two Volumes. The Table given 
on page ix shows the number of species belonging to each of the 28 Families and 
of those peculiar to the region. He says that it is almost impossible to give any 
generalizations as to the composition of the Central American Heterocera, because so 
little is known of the species inhabiting the adjacent parts of South America; but it 
may safely be said that their affinities are almost entirely South American, and the 
few northern forms that do occur mostly belong to widely distributed genera. 
The 101 coloured plates include figures of 1926 species, a complete list of which is 
given in the Introduction to Vol. I., pp. xi-xxxi. 
Since the conclusion of Mr. Druce’s work, in 1900, a large number of species have 
been added, especially from Mexico and Costa Rica, mainly by Mr. W. Schaus, who 
has specially visited Costa Rica, &c., in search of Lepidoptera. Sir George Hampson, 
too, in his revision of the Noctuide, Pyralidz, &c., has also contributed largely to our 
knowledge of the Tropical American Heterocera, the critical study of which had 
scarcely been commenced when Vol. I. was undertaken. 
42, LepipopTeRA Hererocera. Vol. IV. (text and plates): by Lord Walsingham : 
Tineina, Pterophorina, and Orneodina. 
This Volume, commenced in 1909, contains the enumeration of the ‘Tineina, 
