154 MR. A. G. BUTLER ON A NEW ORTHOPTERON. [Mar. 2, 



enclose an unequally pentagonal impression ; extremity (representing 

 the globe of the bottle) depressed and scarcely perceptibly swollen in 

 the dorsal line. 



MaxillcB slender, elongated, incurved, very sparsely provided 

 with hairs ; outer lobe simple, rugulose, svpoUen at the extremity ; 

 inner lobe nearly smooth, compressed, vi^ith carinated inferior edge, 

 its inner surface sulcated, extremity armed with three long spines, 

 cue of which is subterminal and the two others terminal. 



Maxillary palpi six-jointed, the first two joints short, smooth and 

 swollen ; the others, excepting the terminal one, which is a mere 

 button, elongated, smooth and cylindrical. 



Labium elongated, depressed, curved, irregular in outline, swollen 

 at the sides, its free margins crenulated ; the ligula separated into 

 apparently three-jointed pseudopalpi, the third or terminal joint of 

 which is large and oval. 



Labial pialpi four-jointed, the terminal article being a mere button ; 

 the third joint longest, widening gradually from its base to its 

 culmen ; other joints compressed, the basal one being the shortest. 



Prothorax smooth and constricted, with slightly elevated, rugose 

 and marginally carinated borders, the inner edges of which are 

 marked by depressed lines ; slightly narrower in front than behind, 

 with dorsal and transverse central impressed lines, the latter in- 

 terrupted in the middle by two deep central punctures ; a third 

 similar puncture at the posterior extremity of the dorsal line, behind 

 which the inner edge of the posterior border is represented by a widely 

 divergent angular depression. 



Frosternum slightly rugulose, simple. 



Abdomen rather small, cylindrical, the cerci very hairy. 



Elytra and wings shining, brown, with very prominent veins. 



Legs moderately robust, very long and more slender than in the 

 other species ; coxse and femora smooth ; anterior femora unarmed ; 

 intermediate femora with carinated infero-exterior margin, armed in 

 the middle with three equidistant, acute, but small denticles ; pos- 

 terior femora ornamented along the superior half of their exterior 

 surface by an obliquely striated patch, carinated and longitudinally 

 sulcated on their lower surface, the outer half of the carina being 

 armed with four acute denticles; inferior surface of knee-joint also 

 armed with an acute spur ; anterior tibiae with two superior terminal, 

 one superior central, and ten inferior spines, the latter arranged in 

 pairs and divergent ; intermediate tibice strongly carinated above, 

 with seven dorsal spines which diverge in pairs from near, the top of 

 the carina on either side ; posterior tibiae three-sided, the edges 

 carinated, with nine spines on the supero-interior margin (the two 

 terminal spines large and curved), and ten on the supero-exterior 

 margin ; inferior margin with two central and three terminal spines, 

 the latter being the largest ; tarsi short, broad, lobate below : length 

 of legs— anterior pair 30 millimetres, intermediate pair 28, pos- 

 terior pair 45. 



Antananarivo (Kingdon). Type in Brit. Mus. 



