ORTHOPTERA g 



although numerous examples of both species have been examined, no green form of 

 the former, or not-green one of the latter has yet been discovered. In this respect 

 they stand alone, for of all the other species which have been examined in such 

 numbers as these, the two distinct forms have been obtained. All the species are 

 nocturnal in their habits, and rest by day on the leaves of various forest trees or 

 plants. The males stridulate freely at dusk and through the night, and can be heard 

 for a long distance, but it is extremely difficult to locate them by sound, and we 

 have only occasionally been able to do so. 



The modified cerci of the males, which form organs for copulation, in most cases 

 furnish excellent specific characters. 



(i) Brachymetopa discolor Redtb. 



Brachymetopa discolor', Redtenb. Verb. z. b. Ges. Wien, 1891, p. 431 ; Brunner 

 P. Z. S. Dec. 1895, p. 894. 



(Plate I. figs. I & ii? ; and Plate II. figs, i & \a.) 



This is a very distinct species, and may be known at once from dark varieties 

 of several of the green species by the shining coal-black front of the head, and the 

 black-spotted legs. 



Hab. Both mountain ranges of Oahu. Mts. near Honolulu (1500 — 2000 ft.). 

 Waianae Mts. (2000 ft.). 



(2) Brachymetopa blackburni Bormans. 



Conocephalm blackbtirni de Bormans Ann. Mus. Genova, xviii. 1882, p. 346. 



Brachymetopa blackburni Redtenbacher Verb. Ges. Wien, 1891, p. 431 ; Brunner 

 P. Z. S. 1895, P- 894- 



(Plate I. fig. 2.) 



Hab. Mountains near Honolulu, 1500 ft. and upwards. 



De Bormans says that this species is found on several of the islands, but the 

 examples taken on islands other than Oahu, no doubt belong to different species. 

 Although I have frequently taken the adult ?, and young of both sexes, I have never 

 seen an adult Z. 



(3) Brachymetopa nitida Brunn. 



Brachymetopa nitida, Brunner Proc. Zool. Soc. Lond. 1895, P- 894- 

 (Plate I. figs. 3, 3«, & lb; and Plate II. figs. 2 & 2a.) 



Hab. The original examples were taken in Kona, Hawaii. I have since collected 

 it on the lower slopes of Mauna Kea, above Hilo, and freely at Olaa in the Puna 

 F. H. II. 2 



