of the Amazon Valley. 161 
very obliquely sinuate-truncate, external angles of the truncature 
strongly produced, almost mucronate; surface punctured near 
the base, light brown, each with a large faint ashy patch on the 
side before the middle, margined and spotted with dark brown, 
and an ashy crescent near the apex enclosing a brown dot; the 
patch obsolete in many examples, and the apical half of the ely- 
tron having sometimes three or four ashy specks. Body beneath 
and legs clothed with dingy brown pile. 
g Apical dorsal plate broadly emarginated, ventral sharply 
notched. 
2 Ovipositor projecting the length of a line beyond the tips 
of the elytra; dorsal plate pointed, ventral truncated. 
This is an equally common species with N. caudata, being 
found at all stations throughout the Amazons region, on dead 
branches. I have seen it in some collections under the name of 
Leiopus deletus. 
21. Nyssodrys rodens, n. sp. 
N. oblonga, subdepressa, postice sensim attenuata (¢ 2), nigro- 
brunnea : thorace vittis quatuor vel sex, elytris lineolis confluen- 
tibus suturaque cinereo-brunneis; his apice oblique sinuato-trun- 
catis, angulis exterioribus valde productis. Long. 3}-44lin. dg Q. 
Head light brown, occiput blackish. Antenne rusty red, tips 
of joints dusky. Thorax widened curvilinearly to the tips of the 
spines, which are short and acute, and placed nearer the middle 
than the hind angles; surface blackish brown, with four (some- 
times six) light-brown vittz (the alternate ones sometimes grey), 
besides a thin dorsal line, which is often absent. Scutellum 
light brown. Elytra gradually narrowed from base to apex, the 
latter obliquely sinuate-truncate, outer angles of the truncature 
strongly produced, almost spiniform; surface blackish brown, 
varied with several light-brown (partially grey) streaks of un- 
equal length and very irregular in position, but always with an 
angulated one near the apex; suture greyish. Body beneath 
and legs clothed with light-brown pile. 
¢ Apical dorsal and ventral segments both notched. 
2 Ovipositor short, projecting to the length of scarcely half 
a line beyond the tips of the elytra; dorsal plate narrow and 
pointed. 
Found throughout the Amazons region, on slender branches 
and twigs; beaten once out of a mango-tree. 
22. Nyssodrys lineolata, n. sp. 
NV. oblonga, robusta, subdepressa, nigro-brunnea: thorace vittis 
septem plus minusve indistinctis, elytris fasciis duabus lineolarum 
maculisque subapicalibus cinereo-brunneis; his apice sinuato- 
Ann. & Mag, N. Hist. Ser. 3. Vol, xiii, ll 
