2 2 FAUNA HAWAIIENSIS 



(i6) P aratrigonidium pacijicum Scudd. 



Trigonidimn pacificum Scudder P. Boston Soc. xii. 1868, p. 139. 



Parat7'igonidumi pacific7im Brunner P. Z. S. Lond. 1895, p. 895. 



This species may be known from any of the preceding by the different neuration 

 of the lateral field of the tegmina. (Plate II. fig. 6ff.) The pronotum is never 

 variegate, nor have the posterior femora towards the base outwardly a large number 

 of closely-set small, but separate, spots, as most of the species of the genus. The 

 cerci are unusually long and in the % extend far back behind the ovipositor. The 

 ^ genital armature (often withdrawn into the body) is quite different to that of any 

 of the preceding, in all of which it terminates in two elongate free processes, which 

 bear minute denticles. In the present species there are no such processes. The 

 ovipositor is also of different form, being interrupted at about the middle of the 

 length of its superior margin. In all the other species, the interruption is nearer 

 the apex than the middle. The ^ tegmina (which vary greatly in colour) are never 

 maculate. In its habits this species is largely terrestrial, although it often ascends 

 certain plants, especially frequenting the tree ferns, and the stems and dead leaves of 

 the banana. In colour it varies from very dark brown (nearly black) to pale testaceous, 

 and it also varies considerably in size. In the wet woods of Hawaii there would 

 appear to be two races, a larger and generally paler one, and a smaller and very 

 dark one with brightly shining thorax, the latter being the more strictly terrestrial 

 in habits. When, however, examples from all the islands are compared, it seems 

 impossible to keep the two as distinct, without making a number of other and 

 ill-defined species. 



Hab. Found on all the islands in the mountain forests, preferring damp and 

 shady places, and moving freely by day. 



Obs. There are several examples of this genus, which probably belong to other 

 and distinct species, but they are too closely allied to some of those described above 

 to be separated without the inspection of more material. 



Group PROGNATHOGRYLLIDES, new group. 



In the Proceedings of the Zoological Society (Dec. 1895) Herr Brunner v. 

 Wattenwyl described a genus ProgiiatJiogryllus to include two species of Hawaiian 

 crickets. The discovery of 14 additional species allied to these, has made it necessary 

 to form several new genera, and to separate the two original species. The characters 

 of the genus Prognathogryllus have in consequence required some modification. The 



