330 MR. HENRY WALTER BATES ON PHASMIDA. 
BACTERIA AMAZONICA, n.sp. B. cylindrica, tenuis, omnino inermis, fusco-lutea; capite 
ovali, subeonvexo, rufescente, supra fusco trivittato ; thorace levi; abdominis seg- 
mentis tribus apicalibus brevibus, haud dilatatis; segmento ultimo minore, supra 
bifoveolato, lateribus bisinuatis, margine apicali incrassato, leviter emarginato; 
segmentis apicalibus ventralibus fortiter gibbosis, gibbo medio carinato, apice ob- 
tuso. Pedibus simplicibus, tarsis omnibus elongatis, articulo basali simplici (mas). 
— Long. corp. 4” 2" ; anten. 4"; mesothor. 1” 1°”; metathor. 10”; abdom. 2”, 
The distinguishing characters of this species are the narrowness of the seventh and 
eighth dorsal abdominal segments, whose lateral margins are continuous with those of 
the preceding, and the shape of the apical segment. In general form the species does 
not differ much from B. muricata, B. serricauda, and numerous other allied species. 
Head with the sides rounded, and the crown convex; pale, with three broad dusky 
stripes. Thorax smooth, dingy-brown. Abdomen with the seventh and eighth dorsal 
segments much shorter than the sixth, but not broader; or if they appear broader, this 
is owing to their being flattened out by the bulk of the sexual organs beneath them. 
The terminal segment is about half the length of the penultimate, and very much nar- 
rower ; its sides are bisinuate or waved, and its narrow apical part has thickened margins 
and on its upper surface two elongated depressions, the apical edge itself being excised in 
ihe middle and having its angles very obtuse. The anal styles are short, straight, and 
abruptly thickened at the end, and they are pendent beneath the apical segment. The 
legs are slender and unarmed ; the tarsi, especially the posterior, are much lengthened, 
and the basal joint is long and simple. 
Hab. Two examples, taken at Ega, Upper Amazons. One of them is rather smaller than the other, and 
has the intermediate legs shorter in proportion. The two specimens, however, agree precisely in M 
the apical segments of the abdomen and their appendages—a fact which shows that these offer more \ 
reliable specifie characters than the legs. 
BACTERIA comis, n.sp. Mas. B. filiformis, gracillima, omnino inermis, luteo-viridis, 
antennis pedibusque pubescentibus; eapite oblongo, supra plano, postice paulo at- E 
tenuato, oculis convexis; abdominis segmento penultimo dorsali haud dilatato, — 
lateribus deflexis; segmento ultimo (longitudine præcedenti equali) postice sub- - 
attenuato, angulis rotundatis, apice leviter emarginato; stylis analibus brevibus — 
simplicibus; pedibus parum elongatis.—Long. corp. 3” 5”; anten. 2" 5”; capit — 
17^"; prothor.13"; mesoth. 10”; metath. 71"; abdom. 1” 83" (Pl. XLV. | 
f.125.) 
Bacteria comis differs from most of the other South American species in the shape of 
the head, which, in the male, is oblong instead of suborbicular; in this respect it T€- - 
sembles B. molita, but it is well distinguished from this by its much larger size, 
E apical dorsal segment being narrow and attenuated instead of inflated on the : 
Head oblong, slightly narrowed behind, above plane, unarmed ; eyes large and promi- : 
“me Antenne pubescent. Body slender, cylindrical, smooth and shining, quite fre 3 
m spines or tubercles, yellowish green, in life doubtless of a grassy-green hue. Thor . 
Lis 
