278 PROCEEDINGS OF THE ACADEMY OF [Vol. LXXIV 



Gryllacris nigrita new species. Plate XXII, figure 5. 



In appearance this insect probably resembles closely G. fusci- 

 nervis var. diamantii Griffini 10 from the Island of Basilan, Phil- 

 ippine Islands. The blackish coloration of the body, except that 

 abdominal tergites are each broadly buffy caudad, and hyaline the 

 tegmina and wings, with veins and veinlets dark, show close agree- 

 ment with that insect. In structure, however, the present insect 

 differs greatly in the very broad vertex and much more elongate 

 ovipositor, while in size it is larger with tegmina and wings shorter. 



Type: 9 ; Labuan, British North Borneo. [Hebard Collection, 

 Type no. 847.] 



Size small, form moderately robust for the genus. Fastigium 

 of vertex very broad, slightly over twice as wide as the proximal 

 antennal joint, surface cephalad flattened, lateral margins rather 

 bluntly rounded; ventrad fusing with frontal fastigium, transverse 

 linear sulcation being indicated only laterad. Face shining but 

 with irregular impressed punctae and lines. Pronotum with 

 cephalic margin of disk broadly convex, cephalic sulcus broad and 

 deep, longitudinal sulcus faintly indicated meso-caudad, caudal 

 sulcus very weak, lateral lobes with V-sulcus broad and very deep; 

 lateral lobes somewhat longer than deep, ventral margin nearly 

 straight, showing faint concavity meso-proximad, ventro-cephalic 

 angle obtuse-angulate but more sharply rounded, humeral sinus 

 small but distinct. Tegmina and wings extending slightly beyond 

 apex of abdomen. Tegmina broadest slightly beyond median 

 point, apex rather broadly rounded and slightly nearer costal than 

 sutural margin. Wings very broad, moderately parachute-like. 

 Ovipositor very elongate, slender, strongly curved at base, thence 

 to apex weakly curved dorsad, the apex faintly enlarged with 

 dorsal margin suddenly oblique to the sharply rounded tip. Sub- 

 genital plate flattened, triangular with apex U-emarginate, the 

 lateral apices forming sharp, equilateral, triangular projections. 

 Limbs hairy. Cephalic and median tibiae armed with the usual 

 number of spines, which are exceptionally short. Caudal femora 

 stout and short, ventral margins armed with five and six internal 

 and nine and ten external small, stout spines, which increase in 

 size distad. 



Head, pronotum, thorax and limbs shining blackish, showing a 

 chestnut tinge. Head with normally concealed portion of occiput, 

 minute lateral ocelli and a longitudinal sulcus on ventral portion of 

 clypeus, buffy. Antennae blackish brown proximad, thence hazel 

 with principal joints (usually every fourth joint) very slightly 

 darker. Tegmina and wings hyaline, showing an exceedingly faint 

 tint of brown, veins and veinlets prouts brown, the cross-veinlets 

 of the wings showing extremely faint traces of narrow marginal 



104 Monit. Zool. Ital., XXIX, p. 29, (1918). 



