INTRODUCTION. 77 
Ijefore he was aware of the existence of the Weiner 
Verzeichniss. 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, Papilionida9, Sphingidte, Bombycid^, Noc- 
tuida?, and PhalaenidEe. 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 vohimes of this series de- 
voted to that section ; but he supposes that the 
)ther primary sections admit of a corresponding 
livision into five types of form. Thus among the 
Sphingidas, these are thought to be represented by 
Zygsena, Macroglossa, Smerinthus, Acherontia, and 
Sphinx. Among the Bom^ycidfe, the five predo- 
minating forms are: — 1. Fasciculatse, such as the 
genera Arctia and Laria ; 2. Verticillatas, exampli- 
fied by Saturnia; 3. Pilosse, as in Lasiocampa ; 
4. Lignivor^, typified by Hepialus, Cossus, &c. ; 
5. Cuspidatae, represented by ^otodonta. The Noc- 
tuidee are divided in a similar manner, but we are 
so imperfectly acquainted with the larva3 of many of 
these, that the grouping is professedly provisional : 
— 1.. Nudge, as in Agrotis, Polia, &c. ; 2. Fusiformes, 
typified by Lithosia ; 3. Fasiatae ; 4. Ciliatas, exem- 
plified by Catocala ; 5. Semigeometrae, 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 Phalfenidae; viz. — 1. Semi- 
noctuales (Phal. margaritarla) ; 2. Geometras ; 
3. PyraUdas ; 4. Tortrices ; 5. Tineas. 
