INTRODUCTION. By Dr. A. Seitz. 
7 
Large day-flying Geometers, recalling Abraxas in their pattern and colouring, are very conspicuous in 
tropical Africa, and to some extent replace Euschema of the Oriental Region. Many species and genera 
were formerly placed with the Bombycids, and even now many species regarded as Geometers cannot be 
classified with certainty owing to our ignorance of the larvae. 
This gives a general idea of the families of Lepidoptera as they are suggested by a superficial 
consideration of the genera conspicuous by their size, form, or number of species or individuals. Naturally 
there is immense variation in such a fauna; in what directions will be shown in more detail in the special 
studies of the following chapters. 
