26 FAUNA HAWAIIENSIS 



The inner series of spines on the posterior tibiae is more strongly developed, and 

 the whole insect is less slender and elongate. 



Hab. Waianae Mountains, Oahu. A single % taken under bark in Feb. 1896. 

 It was being attacked by the introduced ant, Pheidole viegacepJiala, which had already 

 bitten off the greater part of the antennae and tarsi. 



(5) Prognathogryllus inexspectattis, sp. nov. 



Gracilis, elongatus, testaceo colore. Pronotum totum pallidum, haud fusco-varie- 

 gatum. Tegmina abbreviata, venis flavis. Femora postica minus incrassata. %. 



Long, corporis 19 mm., pronoti 375 mm., Lat. pronoti 3 mm., Long, tegminum 

 5 mm., femorum post, circa 9 mm., ovipositoris 6'50 mm. 



Readily distinguished from P. oalmensis by the much -narrower posterior femora, 

 the unicolorous pronotum, which is also narrower, and the shorter spines of the pos- 

 terior tibiae inwardly. From P. elongatus the evidently shorter posterior legs at once 

 separate it. 



Hab. Kauai (4000 ft.). Under ha.rk of A cada koa. 



Aphonogryllus, gen. nov. 



Gracilis, elongatus, tegminibus alisque carens. Tibiae anticae tympano nullo 

 instructae ; posticae utrinque spinis armatae, internis, quam externae, multo longioribus; 

 calcar internum et superius multo longius quam dimidium metatarsi. Cerci brevissimi, 

 tarsorum articulis tribus posticorum, una conjunctis, haud aequales. $. 



(i) Aphonogryllus apteryx, sp. nov. 



Testaceus, dorso plus minusve fusco-variegato. Tegmina libera nulla, sed latera 

 mesonoti lobate-producta. Femora postica minus fortiter elongata. Tibiae posticae 

 supra infuscatae, spinis utrinque armatae, internis multo longioribus, basi nigris, media 

 parte pallidis. ^. 



Long, corporis 16 mm., pronoti 3'25 mm., femorum post. 7*5 mm., cercorum 2 mm. 

 (Plate IL figs. 9, 9^;, 9^, gr.) 



Hab. Mountains of Oahu. Two males taken in 1896, one at an elevation of 

 2500, the other of 3000 feet. 



Nesogryllus, gen. nov. 



Gracilis, elongatus. Tegmina capite una cum pronoto bis longiora. Alae teg- 

 minibus multo breviores. Tibiae anticae tympano instructae ; posticae utrinque spinis 

 armatae, internis, quam externae, multo longioribus ; calcar internum et superius haud 



