THE TETTIGIDZB OF CEYLON. 
107 
he obtained principally during the season of 1903. In accordance 
v/ith this plan the carefully preserved material comprising about 
two hundred specimens was received in good condition and 
formed the basis of this monograph. Not only is the author 
indebted to Mr. Green for the collection, but also for notes 
concerning the habitat of many of the species which he furnished 
on request. Recourse was had to a small number of specimens 
previously contributed to my collection by Prof. Ignacio Bolivar 
of Spain and Mr. Malcolm Burr of England, to whom acknowledg¬ 
ment is here again tendered. 
The admirable work of Bolivar (1887) forms the foundation of 
our systematic knowledge of the Tettigidse. This “Essay” 
embraced, among other valuable facts, a table of the classified 
grouping of sections and genera which the student cf orthoptera 
will find indispensable. In the interval or since the above- 
mentioned work appeared, many interesting new species and 
genera have been described in various publications. There is 
need, therefore, of a complete revision, one that will not only 
bring together the forms existing in the world, but moreover 
meet the requirements and be treated from the recent biological 
aspect of the subject.* 
Enumeration of Genera and Species. 
Subtribe I.—CLADONOT1NJE. 
Genus Deltonotus , Hanc. 
1. Deltonotus tectiformis, Hanc. (Plate I., figs. 2-2a.) 
Genus Cladonotus , De Sauss. 
2. Cladonotus humbertianus, De Sauss. 
3. Cladonotus latiramus, Hanc. (Plate I., figs. 1-la.) 
Subtribe II.—.S' CELIMENINzti. 
Genus Scelimena , Serv. 
4. Scelimena gavialis, De Sauss. (Plate I., figs. 4-4 c.) 
5. Scelimena logani, Hanc. (Plate I., figs. 5 -5c.) 
Genus Gavialidium , De Sauss. 
fi. Gavialidium croeodilus, De Sauss. (Plate II., figs. 11-11 b.) 
7. Gavialidium alligator, De Sauss. 
Genus Lamellitettix , Hanc. 
8. Lamellitettix acutus, Hanc. (Plate II., figs. 6-6&.) 
* Such a revision is contemplated by the present author if sufficient material 
can be obtained to warrant the undertaking. For the contribution of specimens 
from any part of the world the author will be most profoundly grateful. 
Acknowledgment will be given in the work to those who thus extend their aid. 
