56 



CATALOGUE OF ORTHOPTEROUS INSECTS. 



23. (151.) Acanthoderus vigilans, Westw. 



Vertice aurito, thorace cariuato corporeque scabro ; fe- 

 moribus mediis bis subtrifoliatis ; abdominis apice lanceo- 

 lato (foem.). 



Long. corp. 2" 6'". 



Acanthoderus auritus, Burmeister, Handb. d. Ent. ii. p. 569 

 (nee Bacteria aurita, Burin, op. cit.). 

 Hab. In Brasilia. 



24. (152.) Acanthoderus oryx, Westw. 



Maris thorace vertice spinato, scabro, cylindrico, granu- 

 lato ; pedibus simplicibus, feminse thorace carinato, scabro ; 

 femoribus mediis bis subtrifoliatis ; abdominis apice lan- 

 ceolate 



Long. corp. maris, 2"-2" 4'" ; fcem. 2" 9'". 



Acanthoderus scabrosus, Burmeister, Handb. d. Ent. ii. 

 p. 569 (nee Bacteria scabrosus, G. R. Gray). 

 Hab. In Brasilia. 



25. (153.) Acanthoderus cornutus. 



Fronte inter oculos bicorni ; vertice et corpore scabris ; 

 pedibus brevibus, crassis. 



Mas. Femoribus simplicibus ; abdomine 9-annulato, in 

 apice truncato. 



Fcemina. Femoribus 4 posticis marginibus dentatis ; ab- 

 domine 10-annulato apice lanceolato, libero, operculum 

 vaginale non superante. 



Long. corp. maris, 2" ; foeminse, 2" 8'". 



Acanthoderus cornutus, Burmeister, Handb. d. Ent. ii. 

 p. 569. 

 Hab. In Insula St. Thomse Ind. Occident. 



26. (154.) Acanthoderus rosarius, Perch. 



Gracilis, cylindricus, prasinus, apice femorum et tibiarum 

 obscuriori ; capite et prothorace 2-, mesothorace 2, 2, 2-, 

 metathorace 2, 2-, segmentisque tribus basalibus abdominis 

 2-spinosis, spinis flavidis. 



Long. corp. unc. 3 ; anten. unc. 2 ; proth. lin. 2 ; me- 

 soth. lin. 10 ; metath. lin. 7 ; abdom. lin. 13 + lin. 3 = 

 lin. 16. 



Bacteria rosaria, A. Percheron, Genera des Ins. Orth. pi. 5. 

 Phasma (Bacteria) rosarium, Be Haan, Orthopt. Orient. 

 p. 134. 



Hab. In America meridionali ? 



27. (155.) Acanthoderus Euterpinus, Westw. 



E viridi flavescenti-brunneus ; gracillimus ; capite, pro- et 

 mesothorace singulis spinis duabus acutis armatis ; pedibus 

 simplicibus longis ; antennis longissimis ; abdominis apice 

 crassiori, segmento ultimo fisso. 



Long. corp. unc. 2-f; anten. unc. 2\ ; cap. lin. Ii; me- 

 soth. lin. 8-J- ; metath. lin. 6 ; abdom. lin. 10 -f lin. 3j = 

 lin. 13£. 



Bacteria spinosa, G. R. Gray, Syn. Pkasm. p. 43. 



Nee Phasma (Bacteria?) spinosum, G. R. Gray in Trans. 



Ent. Soc. i. 46 (= Acanthoderus spinosus). 



Hab. In Brasilia. B.M. 



28. (156.) Acanthoderus Tolima, Westw. 

 Plate XXIV. fig. 5, male. 



Tenuissimus, cylindricus, olivaceo-fuscus ; capite brevi, 

 rotundato, spinoso ; thorace spinoso-verticillato, spinis albi- 

 dis ; meso- et metathorace supra, pedes postice dilatatis ; seg- 

 ments abdominalibus postice lateraliter angulato-dilatatis, 

 spinisque duabus in medio marginis postici, segmentis 

 tribus ultimis dilatatis ; ultimo infra concavo, stylis duobus 

 analibus curvatis, in medio latis apice acutis ; pedibus lon- 

 gissimis, spinosis (mas). 



Long. corp. unc. 1£ ; anten. lin. 19; proth. lin. I}; 

 mesoth. hn. 5 ; metath. lin. 31 ; abdom. lin. 6 + lin. 2\= 

 lin. 8J. 



Hab. In Columbia (Pic Tolima ; D. Gaudichaud). In 

 Mus. Saunders. 



This species is closely allied to B. Thestylis, but it is 

 shorter in the proportion of the different parts of its body, 

 and is much more strongly spined. The head is short, 

 broad, round, and very convex, armed above with two pairs 

 of spines, the hinder pair being the largest. The antenna? 

 are very long and slender, irregularly annulated with buff. 

 The prothorax is armed with two erect spines at its hinder 

 part. The mesothorax is long and slender, considerably 

 dilated at the insertion of the legs (as is also the metatho- 

 rax), armed with about twelve spines arranged in three ir- 

 regular transverse series. The metathorax has about ten 

 similar spines, four arranged transversely near the middle, 

 two at the extremity of each of the divisions, and two lateral 

 oues. The hind part of each of the abdominal segments is 

 dilated and deflexed ; the middle of the hind margin both 

 dorsally and vcntrally armed with two spines. The three 

 terminal segments are widened, the last dilated at the sides, 

 margined behind, and subtruncate ; the three terminal ven- 

 tral segments are much swollen, extending to the extremity 

 of the eighth segment, which has the lateral margins emar- 



