164 RHYNCHOPHORA. 
One male, somewhat abraded. Near A. ocellatus, but with the black, white-edged 
patch more oblique, placed closer to the apex of the elytra, and reaching to near the 
suture, the ventral excavation broad and almost smooth, the posterior tibie not ciliate. 
The form and position of the black spot also separate A. nigronotatus from A. biguttatus. 
19. Ambates biguttatus, sp. n. (Tab. IX. fig. 31, 2.) 
Moderately elongate, dull, black or piceous ; the prothorax with a line on each side, extending forward on to 
the head and rostrum, and sometimes a line along the lower part of the flanks, ochreous or whitish, the 
elytra each with a very large, rounded or oblique, velvety-black spot—bordered all round with ochreous 
or whitish scales—on the disc a little beyond the middle; the rest of the vestiture of the upper surface 
brownish, that of the under surface paler and rather sparse. Rostrum arcuate, very stout, rugosely 
punctate and unicarinate. Prothorax broader than long, subconical, the sides parallel at the base ; finely, 
rugulosely punctate, and sometimes obsoletely carinate. Elytra much wider than the prothorax, 
elongate-triangular ; finely punctate-striate, the interstices flat, rugulosely punctulate. Ventral segments 
1 and 2 broadly excavate down the middle in the ¢. 
Var. The black elytral spots larger, heart-shaped, followed by a curved whitish fascia and bordered in front 
with a few ochreous scales. 
Length 43-71, breadth 17-3 millim. (¢ 2.) 
Hab. Muxico, Yolotepec in Oaxaca (Saillé), Playa Vicente (Hége), Teapa (H. H. 
Smith); GuateMaa, Sinanja in Vera Paz, Cerro Zunil (Champion). 
Nine specimens, the two from Teapa treated as a variety. Less elongate than 
A. cecus, the elytra much broader than the prothorax, elongate-triangular, and with 
the black spot more rounded. ‘The larger, rounded, elytral spot edged all round with 
ochreous, the spot itself placed nearer the apex and more distant from the suture, and 
the finely punctured elytral striae, separate A. diguttatus from A. bisignatus. The eye- 
like spots on the elytra are very similar to those of Hilipus circuliferus. 
20. Ambates pictipennis, sp. n. (Tab. IX. fig. 32, 3.) 
Elongate, rather narrow, dull, piceous or rufo-piceous, the legs in great part ferruginous ; the prothorax with 
a sharply-defined yellow line on each side, extending forward on to the head and rostrum and backward 
on to the base of the elytra, the elytra each with a large, velvety-black, pyriform spot on the disc a little 
beyond the middle, followed by an oblique, sinuous, yellow stripe, this latter bordered posteriorly with 
black and sometimes connected along the suture with a yellow apical streak ; the rest of the vestiture of 
the upper surface sparser, brownish, sometimes with yellow scales intermixed, that of the under surface 
dense and whitish. Rostrum arcuate, stout, rugulosely punctate and finely carinate. Prothorax a little 
broacer than long, subconical, rounded at the sides posteriorly, densely, rugulosely punctate. Elytra 
elongate, finely punctate-striate, the interstices flat and densely punctulate. Ventral segments 1 and 2 
excavate down the middle in the ¢. 
Length 41-43, breadth 1}-1} millim. (¢ 2.) 
Hab. Panama, Bugaba, Volcan de Chiriqui (Champion). 
Three specimens. Very like the variable A. diguttatus, but with the prothoracic 
vitte sharply defined, the black spots on the elytra pyriform and followed by a sinuous, 
oblique, yellow stripe, which is sometimes connected with the yellow streak at the 
apex, the vestiture of the under surface dense and whitish. 
