54 



CATALOGUE OF ORTHOPTEROUS INSECTS. 



quadrato, lateribus antice spina obtusa serieque duplici 

 dorsali ; mesothorace postice dilatato spinisquc diiabus 

 niagnis compositis, alterisque duabus metatboracis spiua- 

 que valida ante pedes posticos ; abdomine elongate, sub- 

 piano, granulate ; segmento 8vo carina valde elevata, apice 

 idtimi emarginato; pedibus tuberculatis (foem.). 



Long. Corp. maris lin. 19 ; cap. lin. 2-| ; proth. lin. l\; 

 niesotb. lin. 3^; metath. lin. 3; abdom. lin. 6|^-|-liu. 3 = 

 lin. 9i. 



Hab. Sarawak, Borneo (D. Wallace). In Mus. Saun- 

 ders. 



Dark brown, varied with ferruginous granulations, opake, 

 rugose, and strongly spined. The head is rather short, 

 with the crown considerably elevated and armed with about 

 five spines, varying in size on each side. The antennae are 

 rather short (broken at the tips), with the basal joint flat 

 above, with a spine on the outside at its extremity. The 

 prothorax is rather short and square, with a strong obtuse 

 spine on each side near the anterior angle, and the disk 

 has two rows of small spines. The mesothorax is much 

 swollen at the sides of its hinder portion ; it has two di- 

 verging spines near its fore margin, and a large compound 

 spine on each side behind, with a pair of corresponding 

 spines in the middle of the metathorax, which is also armed 

 with a pair of strong diverging spines in the middle of the 

 lateral margins. The abdomen is much narrower than the 

 metathorax, and is gradually narrowed from the base to the 

 sixth segment ; each segment has two tubercles at each 

 side near the base, and four others arranged in pairs 

 near the middle of the hind margin ; the seventh and 

 eighth segments have two stronger obtuse spines between 

 the middle and the fore angles, the eighth being elevated 

 in the middle into a strong crest ; the ninth segment is 

 nearly flat, obconic-truncate, tuberculated at the sides and 

 emarginate at the extremity. The operculum is small, 

 slightly convex, carinated down the middle, and extends 

 to the extremity of the eighth dorsal segment ; the anal 

 styles are very short. The legs are short and tuberculated ; 

 the femora with a small spine on the upper edge at the 

 tip ; the tarsi short, with the basal joint scarcely longer 

 than the following. 



Plate XXVI. Fig. 1. The female (probably not mature), of 

 the natural size. 1 a. The head and front of the thorax 

 seen sideways. 1 b. The terminal segments of the abdomen 

 seen sideways. 



20. (148.) Acanthodenis Otys, Westw. 

 Plate XXVI. fig. 2, male. 



Fusco-cinereus; capite oblongo, inter oculos 2-spinoso, 



vertice elevate, 4-spinoso ; antcnnis brevibus, 1 8-articulatis, 



articulo basali extus bispinoso, a]iicalibus attemiatis ; meso- 



ct mctathorace postice rotundato-dilatatis, scrratis, et in 



medio tuberculis erectis instructis ; abdomine elongato, 



gracili, segmento scptimo latiori ; angulis posticis obtuse 



porrcctis ; noni apice emarginato ; pedibus brevibus, sub- 



tuberculatis (mas). 



Long. Corp. lin. 17; cap. lin. 2; anten. lin. 5j ; proth. 



lin. Ij ; mesoth. lin. 3^^ ; metath. lin. 2f ; abdom. lin. 6 



-f lin. 2i=lin. 8|. 



Hab. Sarawak, Borneo {D. Wallace). In Mus. W. W. 

 Saunders. 



Entirely ashy-brown, opake, with the anterior triangu- 

 lar portion of the meso- and metathorax paler. The head 

 is oblong, with two strong diverging obtuse spines between 

 the eyes ; the crown is elevated behind and armed with 

 two pairs of erect obtuse spines. The antennae are short, 

 18-jointed ; the basal joint broad and flat above the 

 outer edge, with two obtuse teeth ; the five terminal joints 

 are mere slender than the preceding and pale luteous. The 

 prothorax is subquadrate, rugose above and at the sides. 

 The mesothorax is rugose in front, its hind part is roundly 

 dilated (as is also the hind part of the metathorax), and 

 each is armed with four obtuse spines ; the former has also 

 two conically elevated tubercles close together in the middle 

 near the hind margin, and on each side of them are two 

 smaller points. The metathorax has a central conical tu- 

 bercle near the hind margin of its anterior division, the 

 hinder division being very short. The abdomen is narrow, 

 with the sides of the second and five following segments 

 nearly parallel, slightly rugose above, each segment, more- 

 over, being a little swollen near its base, as well as near its 

 extremity on each side ; the seventh segment is wider than 

 any of the preceding, with the hinder angles considerably 

 produced and with an obtuse tubercle on each side ; the 

 eight segment is narrower, with a strongly elevated carina 

 in the middle, and an obtuse tubercle on each side ; the 

 ninth segment is subquadrate, with a tubercle on each side 

 and the apex emarginate. The terminal ventral segments 

 are very much swollen. The legs are short and thick, 

 slightly tuberculated (the hind thighs more strongly than 

 the rest) ; the tarsi with the basal joint short. 



Plate XXVI. Fig. 2. The male, of the natural size. 2 a. The 

 head and thorax seen sideways. 2 b. The terminal segments 

 of the body seen sideways. 



21. (149.) Acanthoderus Tisiphone, Westw. 

 Plate XXVI. fig. 10, male; fig. II, female. 



Fuscus, obscurus, rugosus ; corpore latiori, subconvexo ; 



