MR. HENRY WALTER BATES ON PHASMIDÆ. 331 
not dilated at the insertion of the legs. Abdomen rather slenderer than the thorax ; 
three terminal dorsal segments of nearly equal length; penultimate scarcely dilated 
towards the tip, sides deflexed ; apical segment attenuated posteriorly, apical edge faintly 
notched in the middle, angles rounded; anal styles short and filiform. Legs less elon- 
gated than usual in Bacteria (fore leg 2" 3", hind leg 2" 6”), pubescent, unarmed ; 
tarsi with the basal joint elongated, simple. 
Hab. One example, received from Bogotá. 
BACTERIA SERRICAUDA, n.sp. Mas. B. tenuissima, omnino inermis, olivacea, antennis 
abdomine pedibusque pilis brevibus erectis dense vestitis; capite convexo, sub- 
orbiculari; abdominis segmento penultimo dorsali parum dilatato, lateribus rectis 
deflexis ; segmento ultimo basi constricto, marginibus multidentieulatis, apice leviter 
emarginato ; stylis analibus sensim clavatis, subrectis, apice subtruncatis; pedibus 
gracillimis, tarsorum articulo primo compresso latiuseulo haud cristato.—Long. corp. 
4 6"; anten. 3” (?) ; mesoth. 1" 1”; metath. 93" ; abdom. 2” 34”. (Pl. XLIV. f. 13a.) 
This species is closely allied to B. Emesa, Westw. (Cat. Phasm. plate v. fig. 3), having 
the same slender form, and nearly the same proportions of the different parts of the 
body ; it differs, however, in the shape of the apical dorsal segment and the anal styles. 
Head convex above, much wider than the prothorax, unarmed. Antennæ pubescent 
(apex wanting). Body unarmed, of an olivaceous hue. Thorax smooth, naked, scarcely 
dilated at the insertion of the legs. Abdomen clothed with short hairs similar to those 
on the antennz and legs; the three apical dorsal segments nearly equal in length, 
scarcely dilated, the seventh slightly so at the apex, the eighth more so, but the sides 
deflexed and the angles rounded; the apical segment excised on each side at the base 
for the passage of the anal styles (which are rather long, pendent, gradually clavate 
to the apex, and obtusely truncated), the rest of its margin distinctly and evenly ser- 
rated, and its apex slightly emarginated. Legs elongated and simple; basal joint of all 
the tarsi strongly compressed along its whole length, not crested. 
Hab. One example, Ega, Upper Amazons. 
BACTERIA CULMUS, n.sp. Mas. B. cylindrica, tenuissima, viridis ; pedibus omnibus in- 
ermibus, valde elongatis, longitudine fere æqualibus ; capite suborbiculari, vertice 
bicorni; abdominis segmento dorsali ultimo precedente longiore.—Long. corp. 5" ; 
anten. 4"; mesothor. 1” 3” ; metathor. 11”; abdom. 2’ ron 
Male. Extremely slender, filiform, and wholly of a grassy-green hue. Head nearly 
globular, the vertex with two moderately long, acute and stout spines, which are 
nearly erect, being curved only in a slight degree forwards. Thorax wholly smooth 
and simple, the proportion of the mesothorax to the metathorax being the same 
as in the other South American species of this group—namely, about as 4:3. The 
abdomen has the seventh and eighth segments about half the length of the sixth; but 
the ninth, or apical segment, is somewhat longer than the two preceding, and, like them, 
is of the same width as the rest of the abdomen, except at the tip, where it is somewhat 
widened, the terminal angles being very much rounded, and the middle of the margin 
3 A 2 
