ORTHOPTERA 21 



Apparently there are two forms, a larger and a smaller, of this species, the former 

 being found at a greater elevation in the mountains than the latter. Except for 

 the difference in size I see no other noticeable distinction between the adults, yet, 

 if I am not mistaken, the immature forms of the larger examples are green, while 

 those of the smaller are not. 



This species is easily distinguished by the very narrow speculum of the ^ tegmen. 

 The large examples are not much less long than P. graiide, but the ^J is a much 

 narrower insect. 



Hab. Kauai (4000 ft), the larger form. The smaller at an elevation of 2000 — 

 3000 ft. Both live beneath the bark of large trees. 



(14) P aratrigonidiuni dcbi/c, sp. nov. 



Angustum, testaceum, fronte cum pronoto pallida, fusco-notata. Tegmen $ dextrum 

 circa venam stridulantem nigro-maculatum. Tibiae anteriores et intermediae distincte 

 fusco- vel nigro-notatae. Femora postica notis parvis nigricantibus nonnullis interne 

 signata. Cerci pallidi. $. 



Long, corporis 6"8mm. ; pronoti V2 mm.; tegminum 4*5 mm. — Lat. tegminum 

 2 '5 mm. — Long, femorum post. 5 mm. 



Hab. Mountains of Oahu (2000 ft. and upwards). 3 $ taken. 



(15) Paratrigonidiiun exiguum, sp. nov. 



Minimum, brunneum, fronte et pronoto variegatis, baud concoloribus. Pro 

 notum ex majore parte nigro-fuscum, pallido-notatum. Antennae articulis basalibus 

 exceptis infuscatae. Femora omnia cum tibiis fortiter nigro-notata. Cerci fuscescentes. 



Long, corporis ^ 6, $ 6 mm.; pronoti % I'S mm.; tegminum ^ 4, ? 4 mm. — Lat. 

 tegminum t 2"5 mm. — -Long, femorum post. ^ 4-2, $ 5 mm. 



A very small species, bearing a great superficial resemblance to P. pacificum Scud., 

 but not really allied at all to that (so far as the Hawaiian species are concerned) 

 isolated species. The variegated pronotum, short cerci &c., will distinguish it at a 

 glance, while the different neuration of the lateral field of the tegmina, and the 

 different form of ovipositor, show that it is really more nearly allied to any of the 

 preceding species, than to P. pacificum, which it superficially so greatly resembles. 



Hab. a single pair taken in the Waianae mountains, Oahu, at an elevation of 

 3000 ft. It is an arboreal species. 



