ACRIDJJLE. 501 



5. MESOPS ENSATOR. 



Mas. Ferrugineo-fuscus, valde compressus ; caput cultriforme, prothorace 

 duplo longius, antice bicariitatum lateribus depressis, apice obtusum ; 

 antenna filiformes, non dilatatce ; prolhorax carinatus, antice et 

 postice rolundatus, laleribus rectis; prosternum unispinosum ; alee 

 minima. 



Male. Ferruginous-brown, long, slender, much compressed. Head 

 cultriform, about twice the length of the prothorax, with two keels and an 

 intermediate furrow above, much flattened on each side, obtuse at the tip. 

 Eyes fusiform, flat, oblique. Antennae filiform, not dilated, a little more 

 than half the length of the head in front of the eyes. Prothorax keeled, 

 slightly and longitudinally rugulose ; fore border and hind border rounded ; 

 sides straight. Prosternum with an acute spine. Length of the body 

 23 lines. 



The specimen described is in a transition state, the wings being rudi- 

 mentary. It is closely allied to M. gladiator, but the head is shorter above, 

 and much shorter on each side towards the tip. 



a. Natal. From M. Gueinzius' collection. 



6. MESOPS PEDKSTRIS. 



pedestris, Erichson, Wiegm. Arch. 1842, 250, pi. 5, f. 10. 



a. Australia. Presented by the Haslar Hospital. 



b. Australia. From Major Parry's collection. 



c. Australia. From Mr. Vigors' collection. 



d /. Australia. From Mr. Darnel's collection. 

 g. Melbourne. From Mr. Paraplin's collection. 



7. MESOPS ? CABINATUS. 



Foem. Piceus,apterus,jiliformis; caput et prothorax tricarinata ; caput 

 prothorace multo longius, antice rotundatum, fronte bicarinata; 

 antenna subdilatatce ; prothorax subrugulosus ; prosternum transverse 

 jugatum ; oviductus vagince lanceolatee. 



Female. Piceous, apterous, filiform, cylindrical. Head and pro- 

 thorax with three keels. Head much longer than the prothorax; part 

 in front of the eyes shorter than that behind them, rounded and not 

 attenuated on the fore border; front with two keels which diverge towards 

 the face. Eyes fusiform, flat, hardly oblique. Antennae lanceolate, slightly 

 dilated, nearly as long as the head and the prolhorax together. Prothorax 

 longitudinally and very slightly rugulose; fore border, hind border and 

 sides straight. Prosternum with a transverse ridge. Sheaths of the oviduct 

 lanceolate. Legs slender. Length of the body 14 lines. 



a. United States. Presented by F. Walker, Esq. 



