276 PROCEEDINGS OF THE ACADEMY OF [Vol. LXXIV 



Three types are found. In the first, the ovipositor is curved 

 dorsad with apex slightly enlarged, like certain spear-heads. In 

 the second, the ovipositor is similarly curved dorsad, but distad 

 tapers evenly to the sharp apex. In the third, the ovipositor is 

 straight and shaped much as in certain Copiphorine genera; slender, 

 but not tapering until near the acute apex. Under these groups 

 the species showing least development of color pattern are placed 

 first. 



This is admittedly a sketchy arrangement, but a beginning must 

 be made or the affinities of the many described species will become 

 almost impossible to ascertain. 



Gryllacris arctata Walker. 



1869. Gryllacris arctata Walker, Cat. Dermapt. Saltat. Suppl. Blatt. Br. 

 Mus., p. 184. [ 9 , Philippine Islands.] 



Los Bafios, Laguna, Luzon, Philippine Islands, (F. X. Williams), 

 1 oMA. N. S. P.]. 



The synonymy of G. brevispina Stal has been confirmed by Grif- 

 fini. 101 The distinctive, though subtle, markings of this diminutive 

 species are plainly shown in the present specimen. Measurements 

 are not given, the individual before us being shrivelled from im- 

 mersion in alcohol. 



Gryllacris vitrea new species. Plate XXI, figure 9. 



This modestly colored insect runs in Griffini's key of the Bornean 

 species of Gryllacris, 102 to that section including G. signatifrons 

 Serville. From that insect the present is distinguished by the more 

 generally pale head, pronotum largely suffused but not conspicu- 

 ously dark, veins and veinlets of wings showing no trace of margin- 

 ing suffusion and immaculate abdomen. 



The male genitalia are widely distinct. 103 



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



Type no. 846.] 



Size and form medium for the genus. Fastigium of vertex broad, 

 but slightly less than one and one-half times as wide as the proximal 

 antennal joint, surface cephalad flattened, lateral margins very 

 sharply rounded but not carinate; ventrad contiguous with the 

 facial fastigium, there showing a bi-concave linear sulcation, which 

 consequently has a median angulation, directed dorsad. Face 

 smooth, not punctulate. Pronotum in dorsal aspect subquadrate; 



101 Philippine Jour. Sci., X, p. 68, (1915). 

 "* Sarawak Mus. Jour., I, No. 2, p. 3, (1912). 

 13 Described for signatifrons by Griffini (Boll. Mus. Zool. Anat. Comp. Univ. 

 Torino, XXIII, No. 581, p. 6, {1908).) 



