ACRIDIDJ5. 527 



Some of the Xiphocera here recorded may form disiinct genera, and 

 the five following species differ especially from the type, and the spines on 

 their hind tibiae are of equal size. They have some affinity to the Opomalce, 

 and on the oilier hand are allied to a few species which will be recorded in 

 the division that is defined by a slightly oblique front and by filiform 

 antenna?, though they differ in the one or in the other of these characters. 



21. XlPHOCERA EXEMPTA. 



Mas. Cinerea ; caput et prothorax subcarinata, subfiliter punclata, 

 nif/ro lineolata ; antenna fere fill formes, prothorace multo lonyiores ; 

 prothnrax antice et poslice rotundatus ; prosterni spina lato obtusa 

 incisa ; pedes nigro nolati, tiiiis posticis saturate rufis basi testaceo 

 fascia tis, larsis poslicis teslaceis ; alee anticce obscure cinerea ; ala 

 posticce niyricante marginalce. 



Male. Cinereous. Head and prothorax minutely punctured, with a 

 slight keel and with several irregular Mack lines. Head conical in front of 

 the eyes ; front with four keels, the inner pair diverging from the vertex to 

 the face. Eyes and ocelli like those of X. ruricola. Antenna flat, nearly 

 filiform, with a black subapical band, much longer than the prothorax. 

 Prothorux with the usual three transverse impressed lines; fore border and 

 hind border rounded. Prosternum with a broad obtuse biJobed spine. 

 Four anterior femora and tibiae and hind femora with black marks ; hind 

 tibia? dark red, with a testaceous band near the base ; spines black, of equal 

 size; hind tarsi testaceous. Fore wings dark cinereous; veins blackish. 

 Hind wings cinereous, blackish about the tips and along the hind border. 

 Length of the body 14 lines ; expansion of the fore wings 26 lines. 



a. Australia. From Mr. Darnel's collection. 



22. XlPHOCERA OPOMALOIDES. 



Mas. Cinereo-fusca, gracilis ; caput et prothorax subcarinata, subliliter 

 rugulosa ; caput antice suhtriaiigvlare, fronte sat obtiqua; antenna: 

 ferruginece, subsetacece ; pecfus antice et poslice subconicum ; pectori? 

 spina luta, furcata ; tibia postica saturate rufcs, spinis cequalibus ; 

 > alee anlicce annulis paucis obscurioribus ; alee posticce cinerea, apice 

 nigricantes. 



Male. Cinereous-brown, slender, nearly cylindrical. Head and pro- 

 thorax minutely rugulose, with a very slight keel. Head with a short 

 nearly triangular cone in front of the eyes ; front rather oblique, with four 

 slight keels, of which the middle pair diverge towards the mouth. Eyes 

 pyriform, oblique, not prominent. Antennae ferruginous, slender, very 

 slightly tapering, with above twenty joints. Prothorax with three slight 

 transverse impressed lines; fore border and hind border slightly conical. 

 Pectus with a broad furcate spine. Hind tibiae dark red, with two rows of 

 short stout black spines of equal size. Fore wings with a few minute 

 indistinct darker ringlets. Hind wings cinereous, blackish about the tips; 

 veins black. Length of the body 18 lines ; expansion of the fore wings 

 30 lines. 



a. Port Stephen, Australia. Presented by the late Earl of Derby. 



