AMBATES. 159 
(the flanks of the prothorax included) densely squamose; the prothorax more finely 
punctate. The bare median space on the abdomen becomes wider towards the apex, 
extending over the greater part of the segments 3-5, and is much smoother in the 
male than in the female. The antenne are inserted at about the middle of the 
rostrum. 
6. Ambates latevittatus, sp.n. (Tab. IX. fig. 18, ¢.) 
Elongate, piceous or rufo-piceous; the prothorax and elytra with a broad dense, continuous, submarginal 
vitta of rather coarse, overlapping ochreous scales on each side, extending forward on to the head and 
rostrum, the rest of the upper surface thickly clothed with small fuscous scales (the elytra sometimes 
with a few ochreous scales along the first stria); the under surface in great part (the ventral segments 
3-5, and the excavation in the ¢, excepted) densely set with rather coarse yellowish-white scales, the 
vestiture of the legs sparse and similarly coloured. Rostrum very stout, strongly arcuate, not longer 
than the head and prothorax, densely, rugulosely punctate and tricarinate, smoother at the tip. Joint 2 
of the funiculus shorter than 1. Prothorax broader than long, opaque, densely, finely punctate. Elytra 
long, finely punctate-striate, the interstices flat and closely punctate throughout. Ventral segments 1 
and 2 excavate down the middle in the ¢. 
Length 33-5, breadth 13-2 millim. (¢ 9.) 
Hab. Panama, Volcan de Chiriqui (Champion). 
Fourteen specimens. Very like the smallest examples of 4. leucopleura, but with 
a broader, ochreous, submarginal vitta, a shorter rostrum, the antenne inserted nearer 
its tip, the second joint of the funiculus not so long as the first. There are many 
allied S.-American forms. 
7. Ambates sinuatus, sp. n. (Tab. IX. fig. 19, 2.) 
Elongate, dull, nigro-piceous, the legs sometimes in part ferruginous ; the prothorax and elytra with a very 
broad, dense, continuous, submarginal vitta of oval ochreous scales on each side, extending forward on 
to the head and rostrum, the elytral vitte sinuous, excised on their inner edge below the base and at the 
middle, and sometimes coalescent at the apex, the rest of the upper surface thickly clothed with 
intermixed blackish and ochreous scales; the sides of the metasternum and abdomen closely, and the 
median portion and legs very sparsely, ochreo-squamose. Rostrum stout, arcuate, densely, rugulosely 
punctate and tricarinate, smoother at the tip. Prothorax nearly as long as broad, densely, finely 
punctate. Elytra long, finely punctate-striate, the interstices flat and densely punctate. Ventral segments 
1 and 2 deeply excavate down the middle in the g. 
Length 53-64, breadth 2-24 millim. (¢ 2.) 
Hab. Panama, Bugaba, Volcan de Chiriqui (Champion). 
Four specimens. In this insect the very broad complete ochreous vitte of the 
elytra are deeply excised on their inner edge at about the middle, the rest of their 
dorsal surface is opaque, and the sides of the body beneath (the metathoracic episterna 
excepted) are somewhat thickly squamose. The following is a closely allied form. 
s. Ambates rhombifer, sp. n. (Tab. IX. figg. 20, 20a, 2.) 
| Elongate, shining, rufo-piceous; the prothorax and elytra with a very broad continuous vitta on the outer 
part of the disc, extending forward on to the head and rostrum—the elytral vitte not quite reaching the 
