4 DR. W. J. HOLLAND ON THE AFRICAN (Jan. 14, 
in my collection with the types in the Berlin Museum and in the 
Museums of Paris and London. But great as is the debt of 
gratitude I owe to these valued friends and colabourers, it is even 
exceeded by my obligations to Dr. Otto Staudinger of Dresden, 
who entrusted to the ocean all the types of African Hesperude 
and all the unnamed material in his vast collection, and freely 
sent them to me for purposes of study and comparison. For this 
act of great generosity I cannot sufficiently thank him. 
In submitting the following pages to the attentive consideration 
of specialists, it is with a sense of the manifold defects which must 
in the lapse of time be found to be contained therein. With the 
exercise of the utmost care, and with all the help of the learned, 
errors are unavoidable. In all cases where doubt attaches in my 
mind to a generic reference, it is indicated. Absolute certainty in 
this respect is not easily attained in some cases. While two-thirds 
of the species accredited to the African fauna are represented in 
my own collection, in some cases by enormously large series of 
specimens, and I have seen in nature probably four-fifths of the 
species of the Hesperiide which have been described as coming from 
Africa, nevertheless in not a few cases I have been compelled to 
rely wholly upon illustrations and the suggestions of resemblance 
made by authors for an approximate location of the species. Yet, 
in spite of the defects which must of necessity exist in this work, 
f venture to express the confident belief that it will be found to 
mark a distinct advance in our knowledge of the subject. 
RHOPALOCERA. 
Fam. HESPERIID 4. 
Subfam. HEsPermin”, 
SaRaneEsa, Moore. 
(Hyda, Mab.; Eretis, Mab.; Sape, Mab.) 
The differences of a structural character between the species 
assigned to the genus Hretis, Mab., and Sarangesa, Moore, are so 
slight as in my estimation not to justify a separation, except 
subgenerically. The principle difference is in the waved outline 
ie secondaries and the relatively longer fringes in the form 
retis. 
* Ereris, Mab. 
1. S. DI aLaLH, Waller. 
- Pterygospidea djclele, Wallgr. K. S. Vet.-Akad. Handl. 1857; 
Lep. Rhop. Caffr. p. 54, no. 5. 
Nisoniades wnbra, Trim. Trans. Ent. Soc. Lond. (3) vol. i 
p. 289 (1862). nt. Soc. Lond. (3) vol. i. 
a can Yelele, Trim. Rhop. Afr. Austr. vol. ii, p. 311, no. 204 
