Hebard- — Derma pf era and Orthoptera of Hazcaii 363 



paciUcum are similar in having their internal margins armed with 

 from I to 4 minute."'' though well-developed, teeth. 



The species is reported as found throughout Hawaii, in the 

 mountain forests and especially in damp and shady places. 



Eneopterinae 



PROGNATHOGRYLLUS Brunner 



1895. Prognathogryllus Brunner. Proc. Zool. Soc. London, 



1895, p. 896. 

 1899. Aphonogryllus Perkins. Fauna Hawaiiensis. II, p. 26. 

 1899. Xesogryllus Perkins. Fauna Hawaiiensis, II, p. 27. 



Genotype, selected by Kirby,"^ ■Prognathogryllus alatits Brun- 

 ner. 



The synonymy of Nesogryllus, due to the sexual dissimilarity 

 shown in the genus, was pointed out by Perkins in 1910,^^ having 

 been obscurely indicated in 1906.'^ 



Failure to recognize the immature condition resulted in the 

 description of the genus Aphonogryllus. In the earlier instars of 

 Prognathogryllus tegmina and wings are absent, the former alone 

 indicated by lateral lobation of the mesonotum. Moreover, no trace 

 of a tympanum on the cephalic tibiae exists, this being first indi- 

 cated merely by a slight depression in the later instars and fully 

 developed only in the adult. Noting such dissimilarity, Perkins 

 described Aphonogryllus, based on immature males of the present 

 genus. 



In all of the Prognathogryllides the cerci are not longer than 

 the total length of the caudal tarsi, except in females of the present 



™ The smallest of these teeth have evidently been worn off in some 

 examples. This condition may account for the minimum number indicated. 

 In some specimens of graudc, the largest species of the genus, five such 

 teetli are visible. 



" Syn. Cat. Orth., II, p. 109, (1906). 



" Fauna Hawaiiensis, II, p. 689. 



" Proc. Hawaiian Ent. Soc, I, p. 50. 



[61 1 



