PHASMID/E. ACANTHODERUS. 



49 



longer on the inside near the tip ; tibiae with a slight tooth 

 on the outside near the base ; tarsi slender." 



Long. corp. unc. 3, lin. 7 ; cap. lin. 2 ; proth. lin. 1£ ; 

 mesoth. lin. 10 ; metath. lin. 8J ; abdom. lin. 19+lin. 3 

 =lin. 22. 



The unique specimen of the male in the British Museum 

 Collection has the seventh segment of the abdomen very 

 much but gradually dilated, with five raised longitudinal 

 lines ; the eighth is gradually narrowed, constricted beyond 

 the middle ; the ninth is rounded at the sides, the extre- 

 mity straight, but with the outer lateral angles deflexed 

 and produced into four acute spines, the tips of which over- 

 lap the opposite spines ; the two anal styles broad, deflexed; 

 the three terminal ventral segments extend to the middle 

 of the eighth dorsal segment, the ninth being swollen at 

 the base. 



3. (131.) Acanthoderus horridus. 



Elongatus, gracilis ; capite inter oculos bispinoso ; pro- 

 thorace leviter tuberculato ; meso- et metathorace longis 

 spinosissimis ; abdomine supra parum spinoso-tuberculato ; 

 femoribus anticis denticulatis, posticis 4 infra versus apicem, 

 denticulatis, tibiis extus prope basin lobatis, tarsorumque 

 articulo basali cristato. 



Long. corp. unc. 5, lin. 9 ; cap. lin. 3 ; metath. lin. 16 ; 

 mesoth. lin. 12; abdom. lin. 30 + lin. 6=lin. 36. 



Acanthoderus horridus, White in Zool. of Voy. Erebus §• 

 Terror, Ins. p. 24. pi. 5. f. 4. 

 Hab. In Nova Zealandia. B.M. 



Head grey ; a slight ridge with four sinuations behind 

 the antennae and between the eyes ; two spines and two or 

 three tubercles on the vertex. Prothorax grey, with several 

 small irregular conical tubercles ; meso- and metathorax 

 brown, with many longish spines, especially on the sides 

 and under parts ; there are several tubercles on the upper 

 parts. Abdomen on the under side with spines shorter 

 than those on the thorax ; the upper parts with several 

 subspiniform tubercles ; fourth and sixth segments dilated 

 on the sides at the end ; coxae of the fore legs with four or 

 five spines ; coxae of the middle and hind legs with two 

 spines ; femora sharply angled, some of the angles with a 

 few teeth, a crested dilatation at the base of the tibiae of 

 the two hind pairs ; basal joints of the tarsi of two hind 

 pairs of legs crested, with a notch at the ends. 



4. (132.) Acanthoderus prasinus, Westw. 

 Plate III. fig. 2. 

 Elongatus, antice et postice attenuatus, viridi-luteus, sub- 



glaber; capite et mesothorace supra spinosis ; abdomine 

 foliolis duobus ovalibus terminato ; operculo cymbiformi, 

 vix apicem abdominis attingente ; pedibus crassioribus ; 

 femoribus basi roseis, anticis extus parce spinulosis, quatuor 

 posticis versus basin et apicem spinosis (foem.). 



Long. corp. unc. 3, lin. 7 ; anten. lin. 9 ; cap. lin. 3 ; 

 proth. lin. 2 ; mesoth. lin. 7\ ; metath. lin. 7 ; abdom. 

 lin. 17 + lin. 6=lin. 23. 



Hab. In Nova Zealandia (Captain Grey). B.M. 



Luteous-green (probably vivid green whilst living), rather 

 polished. The head considerably larger and wider than 

 the prothorax, oval, with a number of small spines on the 

 crown arranged symmetrically. The antennae rather short, 

 brown, with the broad basal and the second joint fulvous. 

 The prothorax is entire ; the mesothorax gradually dilated 

 from the fore margin to the middle, behind which the sides 

 are parallel ; the upper surface is armed with a number of 

 small spines placed irregularly ; the metathorax is slightly 

 wider than the mesothorax, being rather swollen in the 

 middle on each side and in front of the base of the hind 

 feet ; its upper surface bears a few small erect spines ; the 

 hinder margin, as well as that of the basal segments of the 

 abdomen, being slightly margined. The abdominal seg- 

 ments are gradually narrowed from the base to the extre- 

 mity, which is furnished with two large oval foliolets ; 

 the sixth segment is constricted in the middle, with its 

 hinder angles prominent. The fore legs moderately long ; 

 the femora bent at the base, and armed with several spines 

 on the upper edge, the tibiae simple ; the four hind femora 

 thickened and angulated, with a spine near the base of the 

 upper edge ; the under edge with several spines, those near 

 the extremity being largest ; the tibiae rather dilated, with 

 a small spine near the base. The operculum has a small 

 spine at its base, and extends to the middle of the ninth 

 dorsal segment. The meso- and metasternum and abdominal 

 segments beneath are armed with a few very small tuber- 

 cles. 



Plate III. Fig. 2. The female, of the natural size. 2 a. The 

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

 of the abdomen seen sideways. 



5. (133.) Acanthoderus lacertinus, Westw. 

 Apterus, subcylindricus, fuscus, opacus, rugosus et spi- 

 nosus, corpore in medio parum latiore ; capite ovali, vertice 

 spiuuloso, spinis 8 majoribus in ovalem dispositis ; pro- 

 thorace spinulis duabus versus marginem posticum ; meso- 

 thoracis lateribus et disco irregulariter spinosis, spinis dua- 

 bus approximatis versus marginem posticum ; metathorace 

 spinulis lateralibus duabusque mediis ; abdomine scabro, 



