346 MR. HENRY WALTER BATES ON PHASMIDZÆ. 
validis, sulcatis, femoribus omnibus parce denticulatis ; antennis brevibus, filiformibus, 
artieulo basali magno dilatato subovato; stylis analibus brevibus, foliaceis, ovatis. 
Mas. Minor, angustior ; capitis spinis obtusis ; thorace verrucoso, pronoto et mesonoto 
antice spinis duabus, lateribus inermibus ; tegminibus et alis brevissimis squamifor- 
mibus; abdomine apicem versus paulo dilatato et longitudinaliter rugoso. Seg- 
mentis omnibus subæqualibus ; pedibus concoloribus, femoribus parce denticulatis; 
segmento ventrali ultimo medio conico-inflato.— Long. corp. 2" 4°"; anten. 5"; me- 
sothor. 6"; metath. 4". (Pl. XLIV. f. 3.) 
Fon. Major, robustior ; capitis spinis acutis ; thorace dorso tuberculato, pronoto antice 
acute quadrispinoso, to et metanoto antice bispinosis, lateribus multispinosis ; 
apterus ; abdominis lateribus denticulatis, segmentis dorsalibus tribus basalibus antice 
bispinosis ; pedibus validis, femoribus quatuor posticis medio cinereo-fasciatis et supra _ 
denticulatis.—Long. corp. 3" 9"; anten. 82"; mesothor. 92"; metath. 63". (Pl. 
XLIV. f. 8.) | 
Closely allied to Dimorphodes Prostasis (Westw.), notwithstanding the rudimentary 
condition of the wings and different form of the body of the male. The females of 
the two species have very great resemblance, almost the only points of difference being the 
number and form of their spines. 
Body in both sexes elongate, parallel-sided, of a dingy-brown colour. Head oblong, 
and spined or tuberculated behind. Antenne short, filiform, basal joint large, oval, and 
dilated. Legs stout, four posterior femora denticulated on their upper surface; anal 
styles short and compressed or foliaceous. In the male the body is covered with: small 
tubercles, the pro- and metanota having each near their anterior edge a pair of larger and 
more acute tubercles. The legs are concolorous with the body, and the basal joint of the 
four hind tarsi is as long as the two following taken together. The abdominal segments 
are of nearly equal length throughout, and are longitudinally wrinkled towards the apex; 
the last dorsal segment is quadrate, with the angles rounded and terminal edge sinuated 
in the middle; the terminal ventral or genital segment is inflated in a conical form, and 
reaches the end of the penultimate dorsal. 
In the female the sides of meso- and metanota and the corresponding sterna have à 
number of stout spines; their surfaces are also spined, as also those of the three basal 
dorsal segments of the abdomen, the front edge of each having a pair of larger spines ; 
the pronotum has two pairs of similar spines near its front margin. The sides of the ab- 
domen are minutely denticulated ; the penultimate dorsal segment is raised and bieristate 
behind ; the terminal segment is narrowed to the tip, with acute apical angles and broadly- 
notched apical margin. The opereulum is scaphiform, and reaches the apex of the 
abdomen. The basal joint of the tarsi is much shorter than it is in the male, and thefour 
posterior femora have an ashy belt in the middle. | 
Hab. Islands of Batchian and 'Ternate, Malay archipelago (Wallace). du. 
There are five examples in Mr. W. W. Saunders's collection, one of them a female pupt» 
which does not differ in form and armature of the body from the adult, but wants the ashy 
belt of the four hind femora. One pair are ticketed as having been taken im copulá. 
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