PEUCESTES.— POSIDIPPTJS. 373 



Var. Pronoti crista? parum ad superum reflexa?. — [Central America.] 



$ . Long. corp. 48 ; proiiot. 13 ; elytr. 88, lat. 30, camp. marg. 13 ; femor. post. 40 ; ovipos. 8 millim. 



6 . Long. corp. 42 ; pronot. 12 ; elytr. 75, lat. 26, camp. marg. 11 ; femor. post. 39 millim. 



Hab. Centeal Ameeica (Mus. Genavense : $ ) ; Panama (Mus. Vind. Cces.). — South 

 Ameeica, Cayenne, Bahia, Pernambuco, Peru. 



POSIDIPPUS, Stal *. 



Posidippus, Stal, Recens. Orthopt. 2, p. 20 (1874) ; Brunner v. W. Monogr. der Phaneropt. 



p. 367; Additam. p. 183. 

 Frontinus, Stal, loc. cit. 



l. Posidippus validus, sp. n. (Tab. XVIII. %g. 10, 11, $ .) 



$ . Maximus, totus prasinus. Facies transverse convexa ; vertex apice haud deflexus. Pronotum latiusculum, 

 margine anteriore haud dentato, in medio transverso, angulis antrorsum productis; costis lateralibus 

 prominulis, a supero et a latere arcuatis, dentibus rotundatis utrinque 10-12 instructis. Elytra latissima, 

 in dimidia parte distali quam in P. citrifolio, L., minus attenuata, apice rotundata ; vena media anguste 

 furcata ; vena principali apice triramosa, ramis valde obliquis. Campus dorsalis dextri elytri irregulariter 

 reticulatus, areolis minutis hyalinis. Ala? in quiete elytra baud superantes, apice rotundata? ; campi antici 

 apex parum acutus. Tibiae antica? supra spinula nulla, intermedia? spinulis 2 armatae. Tibia? postica? 

 haud dilatatae, apice tantum leviter attenuata? sicut in P. citrifolio, L. 



2 . Long. corp. 50 ; pronot. 14, lat. 12 ; elytr. 81, lat. 29, camp. marg. 14 ; femor. post. 39 ; ovipos. 

 8 millim. 



Figtjees : — Pig. 10, an elytron of the female. — Fig. 11, head and pronotum, from above. 



Hab. Nicaeagua, Chontales (Janson). 



This is the largest species of the genus. It is distinguished by the crests of the 

 pronotum, and by its very wide and obtuse elytra, these latter being much wider than 

 in P. citrifolius, L. The wings are shorter than the elytra, and in repose do not extend 

 beyond them ; they are obtuse (not acuminate) at the tip. P. validus is closely allied 

 to P. stali, Brunn., from Brazil, but the anterior tibiae are without spines. 



Tribus CONOCEPHAL1N.E f. 



Conocephalida, Bruimer v. W. ;— Redtenbacher. 



Tarsi depressi, articulo primo et secundo utrinque longitudinaliter sulcato, tertio saltern utrinque laminatim 

 dilatato. Foramina tibiarum anticarum raro aperta vel conchata. Verticis rostrum ultra scrobicula 

 antennarum haud prominens. Verticis apex itaque libere prominens, supra haud sulcatus, productus 



* Scudder states that his genus Steirodonopis is closely allied to Posidippus, Stal, but differs from it in the 

 considerable basal compression and vertical expansion of the middle and hind tibia? [Prop. Bqst. Soc. Nat. Hist, 

 xvii. p. 259 (1875); xxvii. p. 214 (1896).— S. Hlobata, Sc. (Peru)]. 



t Principal recent works referred to for this tribe : — 



C. Stal, Eecensio Orthopterorum, part 2. Stockholm, 1874. 



Alph. Picxet, Locustides Nouveaux ou peu connus du Musee de Geneve, 1888 (Mem. de la Soc. de Physique 

 et d'hist. Nat. de Geneve, xxx.). 



Joseph Redtenbachee, Monographie der Conocephaliden [Verh. zool.-bot. Ges. Wien, xli. (1891)]. A very 

 complete monograph of the whole tribe, which we have followed in this work. 



