1888.] INSECTS OF CHRISTMAS ISLAND. a49 



LOCUSTID^. 

 PrIMNIA (?) ORIENTALIS. 



Exp. al. 44 millim. ; long. corp. '26 millim. 



Grass-green ; antennae about twice as long as the head and prono- 

 tum, yellowish (faded?), the tips brownish ; tips of mandibles and palpi 

 dark green ; vertex with four dusky lines approximating in front, 

 the inner ones much nearer together than the space between these 

 and the others ; the transverse grooves on the pronotum black, the 

 first shorter than the others, and ending in a dusky spot on each 

 side, behind which is another dusky spot (between the second and 

 third grooves) ; the second groove is angulated forwards at its extre- 

 mities, ending in blackish spots ; before the first groove runs a 

 transvei-se reddish line, only distinct on the sides. Abdomen blackish 

 above, green on the sides and beneath ; a large dark green spot 

 beneath, towards the extremity of the 8th segment. Elytra green, 

 with many of the longitudinal nervures yellowish ; the intermediate 

 spaces inclining to hyaline beyond the middle. Wings smoky hyaline, 

 with brown nervures ; costal nervure yellow, and the nervures at the 

 base and alone; the inner margin grass-green. Spines short, tipped 

 with black, as well as the claws. 



I refer this insect to Primnia, Stal (the type of which is from St. 

 Helena), with some doubt. 



" Flew into light in tent, October 9th." 



Cyrtacanthacris fusilinea, "Walk. (?). 



Cyrtacanthacris fusilinea. Walk. Cat. Derm. Salt. iii. p. 564. 

 n. 30 (1870). 



I am not quite certain that the specimen from Christmas Island 

 is identical with Walker's species from Ceylon ; but it closely 

 approaches it, and as there is only a single specimen from the 

 former locality, and that not in very good preservation, I have been 

 unwilling to describe it as new. 



Cyrtacanthacris disparilis, sp. n. 



Exp. al. c? 90 lin., $ 115 lin. ; long. corp. c? 54 lin., 5 80 lin. 



3Iale. Head and body yellow, inclining to reddish above ; antennae 

 with the first two joints yellow, the remainder black above, beneath 

 pitchy or yellowish ; tegmina longer than the abdomen, yellow ; the 

 longitudinal veins darker ; towards the tip the membrane becomes 

 nearly hyaline, and many of the nervures are brown. Wings smoky 

 hyaline, the nervures towards the base and costa yellow, the 

 remainder brown ; the nervures immediately at the base incline to 

 reddish. Legs yellow, darker above ; tarsi inclining to reddish ; the 

 joints sometimes marked with green ; claws black at the tips ; hind 

 femora with three carinae above, with short and distant serrations ; 

 these and the lower lateral carina are irregularly marked with black ; 

 the intermediate space above is slightly reddish, more so at two 

 points than in others, which gives the appearance of two interrupted 

 bands. Sutures of the knee-joint black. Hind tibiae with a green 



