INTRODUCTION. 
Ins. 3 
INTRODUCTION. 
The number of titles this year is 1669, contrasting with 1549 last year. 
Kellogg’s Introduction to North American entomology (834) is the 
only work of very wide scope we have to notice this year. Blanchard’s 
work (124) on mosquitoes is intended specially for those who are not 
general entomologists, and will be found very useful by medical officers 
and others who have to do with Culicidce. 
In the monograph of Heliconiida bv Stiohel & Riffarth (1452') a 
most complicated nomenclature is introduced ; the species are arrangea in 
Sections and Cohorts, each one of which has a name. As the name has 
a plural termination we may presume that it cannot be considered as 
a subgenus and we have therefore not specially recorded these terms* they 
being merely substitutes— and it woula appear of a superfluous nature — 
for the numerals and letters ordinarily used in the arrangement of species. 
Besides this a trinomial or a quadrinomial nomenclature is used for each 
of the species. 
The second part of the late Prof. Packard’s Bombycine moths (1131) 
calls for special notice : though ostensibly devoted to the Ceratocampince , 
it includes some introductory chapters containing much matter of great 
general interest ; .the wealth of illustration gives an additional charm to 
the work. 
The first Volume of the butterflies of the Fauna of British India has 
appeared and is highly spoken of ; Bingham (119). Another Volume of 
the British Museum Catalogue of Lepidoptera has appeared; Hampson 
(715). Aldrich’s catalogue of N. American Diptera (14) and Becker 
& Bezzi’s catalogue of Palaearctic flies are very valuable. Lewis’ catalogue 
of Histeridce (951) shows that the described species have more than 
doubled in number since 1868, the date of the corresponding Volume of 
the Munich catalogue of Coleoptera. 
M. ThIsry’s work on Madagascar Buprestidee describes many new 
species, and includes a discussion on the origin of the fauna of Madagascar. 
Enderlein’s (497) revision of two divisions of Psocidce is another good 
contribution ; and Johannsen gives us an important work on N. 
American Chironomidce (820). Escherich’s study of Lepismatidce shows 
the extraordinary development of knowledge that has occurred in the 
past 30 years. Lass’s paper on the flea (918) is of more general interest 
than its title would lead one to expect ; besides its anatomical interest it 
also deals with metamorphosis and habits. 
Verhoeff (1539) has given us an important paper on the morphology 
of the head, based on a study of the lower orders. 
Voss’s memoir (1555) on the thorax of Gryllus contains much matter 
of morphological importance concisely stated : it is lengthy but it touches 
on many points. He has a ^ood phylogenetic table of the winged Insects : 
and promises a paper in which development is to be dealt with. 
In anatomy Hoffmann’s study (753) of the mouth-parts of Tomocerus , 
and Kulagin’s (901) of Culicidce are each valuable. The second of these 
memoirs is accompanied by some very thoughtful considerations as to a 
great polyphylism in Insects. Wandolleck (1565) contributes a study of 
the abdomen of the 9 m Coleoptera ; although not based on a very large 
number of examples, it is in other respects of considerable value. We 
have a summary of the structure and function , of Malpighian tubes from 
Veneziani, together with new observations and elucidations (1536). Scott 
