RHYNCHOPHORA. 483 
Ambates albiventris (p. 169). 
To the Costa Rican locality given, add :—Turrialba, San Carlos (U.S. Nat. Mus.). 
Two males and two females. In fresh specimens the elytra have numerous, small, 
more or less distinct patches of yellowish-white scales along the strie. ‘The meso- 
sternal side-pieces and the sides of the first ventral segment are apparently always bare 
or sparsely squamose (so that the oblique lateral yellowish-white patch on the elytra 
may be said to be continued broadly downwards on to the metasternum). ‘The 
rostrum of the female is a little longer and more slender than in the male, and almost 
smooth from about the basal third. Described from a single somewhat worn male. 
34. Ambates chetopus, sp.n. (Tab. XXIII. figg. 15, 13a, 2 .) 
Elongate-rhomboidal, rather broad, flattened above, black, the antennee (the club excepted) and the tip of the 
rostrum rufous, the tarsi rufo-testaceous ; above somewhat thickly clothed with small blackish, yellowish- 
white, and ochreous scales, the ochreous scales condensed into a narrow, oblique, evanescent, submarginal 
vitta or line on the prothorax, which is continued forward on to the sides of the head, and an elongate- 
triangular patch at the apex of each elytron, the paler scales clustered into numerous small irregular spots 
along the strie ; the vestiture of the under surface ochreous or pale ochreous, very dense, sparser along 
the middle of the metasternum and abdomen; the tarsi strongly fulvo-setose in both sexes. Head 
rugulosely punctate; rostrum feebly curved, rather slender, considerably longer than the head and 
prothorax, very sparsely, finely punctate, in the 2 more elongate, slender, and almost smooth from about 
the basal fourth, the antenne inserted far behind the middle in both sexes. Prothorax transverse, 
conica], constricted in front; densely, finely, confluently punctate, with a smooth, raised median line 
anteriorly. Elytra elongate-triangular, much wider than the prothorax; finely punctate-striate, the 
interstices densely, rugulosely punctate, the ninth narrowly costate for some distance below the base. 
Beneath densely punctate. 
$. Ventral segments 1 and 2 broadly hollowed, smoother, and sparsely squamose down the middle; tarsi 
slightly dilated and densely clothed with long, fulvous, bristly hairs ; anterior tibixe fulvo-ciliate at the 
apex within. 
Length 94-10, breadth 4-41 millim. (d @.) 
Hab. Costa Rica, Carrillo, San Carlos (U.S. Nat. Mus ). 
the eyes; rostrum moderately stout, curved, a little longer than the bead and prothorax, densely 
punctate and finely carinate in its basal half, and sparsely punctate and shining thence to the tip, in the 
Q slightly smoother, the antenne slender and inserted at about the middle. Prothorax strongly 
transverse, constricted and arcuately narrowed in front ; densely, finely punctate, and sometimes with 
indications of a raised median line. Elytra much wider than the prothorax, clongate-triangular, 
obliquely depressed on the dise below the base, and with prominent subapical eallosities ; finely punctate- 
striate, the interstices flat and densely, finely punctate. Beneath densely punctate, the ventral segments 
3 and 4 with a smoother space in the middle, Femora sharply dentate. Length 73-8, breadth 31-34 
millim. 
Hab. Sr. Vixceyt, Windward side, 1000 feet (IT. H. Smith). 
Five specimens, found on foliage, one with intermixed fulvous and white scales on the sides of the prothorax 
(? somewhat abraded). Larger and broader than A. scutiyer, the sides of the prothorax white, the dark patch 
on the elytra placed nearer the base, the rostrum and antenn more slender, &c. More elongate than 
3902 
A. ornativentris, the vestiture differently coloured. 
