INTRODUCTION. 77 
before he was aware of the existence of the Weiner 
Verzeichnm. Adopting the views of Mr. Macleay, 
he endeavoured to work out on this basis a circular 
arrangement of the lepidopterous order, and ac- 
cordingly divided it into the five following sections, 
namely, Papilionidae, Sphingid®, Bombycid®, Noc- 
tuid®, and Phalmnid®. The small portion of his 
work hitherto published is almost entirely confined 
to the diurnal Lepidoptera, and we have accordingly 
spoken of it in one of the volumes of this series de- 
voted to that section ; but he supposes that the 
other primary sections admit of a corresponding 
division into five types of form. Thus among the 
Sphingid®, these are thought to be represented by 
Zyg®ua, Macroglossa, Smerintlius, Acherontia, and 
Sphinx. Among the Bombycid®, the five predo- 
minating forms are: — 1. Fasciculat®, such as the 
genera Arctia and Laria; 2. Verticillat®, exampli- 
fied by Satumia ; 3. Pilos®, as in Lasiocampa ; 
4. Lignivorre, typified by Hepialus, Cossus, &c. ; 
5. Cuspidat®, represented by Notodonta.l The Noc- 
tuidffi are divided in a similar manner, but we are 
so imperfectly acquainted with the larv® of many of 
these, that the grouping is professedly provisional : 
— 1. Nud®, as in Agrotis, Polia, &c. ; 2. Fusiformes, 
typified by Lithosia ; 3. Fasiat® ; 4. Ciliat®, exem- 
plified by Catocala ; 5. Semigeometr®, as in Plusia. 
A like number of dominating forms, to which all 
the others are supposed to be referrible, is thought 
to be exhibited by the riialmnid® ; viz. — 1 . Semi- 
noctuales ( Phal. margarilaria ) ; 2. Geometr® ; 
3. Pyralidai ; 4. Tortrices ; 5. Tine®. 
