72 
Psyche 
[Ji 
notum, 2.3; 2.3; length of mesonotum, 3.4; 3.6; length of 
tegmen, 15.4; 15.4; greatest width of tegmen, 5 . 2 ; 5.2. 
Holotype, male, Arthur’s Pass, New Zealand, 2,500 feet, 
19th December, 1922, Iris Myers. (Myers collection). 
Allotype, female, same station, 24th December, J. G. 
Myers. (Myers coll.) 
Paratopotypes, series of males and one female, H. Hamilton, 
Myers. 
Paratypes, 2 males, White Rock, North Canterbury, 26th 
November, 1922, S. Lindsay. 
This very interesting species, apparently confined to un- 
stable river-beds, is dedicated to Mr. H. Hamilton, who dis- 
covered the species at Arthur’s Pass before we collected it there. 
It is very cryptically colored on the grey river-bed shingle and is 
one of the most difficult of all New Zealand cicadas to locate. 
The song of Melampsalta hamiltoni. — When first heard from 
a distance th’s song sounds very like a fainter edition of the song 
of M. muta. Closer acquaintance reveals distinct differences, 
though a resemblance in pattern and in tonal quality still remains. 
The song of Hamiltoni is pitched slightly lower, the rhythm of the 
short rather staccato notes is more broken, though the tempo is 
very similar, being from two to three notes per second. A 
striking difference, however, is that quite often in the song (v. B) 
a series of long drawn out notes is accompanied by a peculiar low 
buzzing sound, perhaps made by the wings, though this has not 
yet been ascertained. 
B -bujynj -sound. . j* 
Melampsalta cassiope (Huds.) 
Cicada cassiope Hudson, 1891, Trans. N. Z. Inst., vol. 23, p. 54. 
Melampsalta quadricincta Myers (nec Walk.), 1921, Trans. N. Z. 
