822 SUPPLEMENT. 
E. rotundatus. The rostrum is flattened and without trace of median sulcus, the 
prothorax very short, the elytra closely setose on the apical declivity, and the legs 
rather slender. 
AMPHIDEES (p. 97). 
The additional material of this genus now to hand includes various specimens of 
A. macer from Tres Marias in Morelos (Wickham) and others collected by ‘Truqui. 
Deamphus puncticollis (antea, p. 104), of which a second example has been found 
amongst Truqui’s captures, is so nearly related to A. macer that it must be included 
in the same genus, the ocular lobes (and conspicuous vibrisse) being as distinctly 
traceable as they are in A. pilosus. JD. latifrons also has rather long vibrisse and 
sufficient sinuation of the anterior margin of the prothorax to indicate a rudimentary 
ocular lobe; it would therefore be better placed in Amphidees, near A. macer and 
A. puncticollis. In the two other species referted to Deamphus—D. brevipennis (type 
of genus) and D. deceptor—the vibrisse are altogether wanting and there is no trace 
of an ocular lobe. 
6 (a). Amphidees acuminatus, sp.n. (Tab. XV. figg. 7, 7 @.) 
Oblong-ovate, acuminate, piceous, the antenne and tarsi obscure ferruginous; thickly clothed with cupreo- 
cinereous and brownish scales, the elytra indefinitely fusco-variegate, the surface also set with long 
scattered, suberect, stout setee. Rostrum short, stout, depressed at the base, shallowly bisuleate on each 
side of the somewhat raised median portion, the inter-ocular portion of the head flattened. Prothorax 
transverse, subtruncate at the base, with feebly developed ocular lobes ; impressed with scattered, rather 
coarse, confluent punctures intermixed with a close fine interstitial punctuation, and also canaliculate 
down the middle. Elytra acuminate-ovate, constricted immediately below the base, the humeri thus 
appearing prominent, the base itself truncate; with rows of scattered moderately coarse punctures, the 
interstices flat on the disc, becoming feebly convex outwards. Second ventral segment at the middle 
nearly as long as the next two united. 
Length 74, breadth 3 millim. (2?) 
Hab. Mexico (Truqut). 
One specimen. Distinguishable by the short, basally depressed, feebly quadrisulcate 
rostrum, and the acuminate, basally constricted, strongly setose elytra. ‘The scrobes 
are less extended backward and the humeri more prominent than in the allied 
A, alternans, Sharp. 
SYNOSOMUS (to follow the genus Amphidees, p. 101). 
Synosomus, Jekel, Ann, Nat. Hist. (3) i. p. 858 (1858). 
The type of this genus * (unlike those of the other forms described by Jekel in the 
same paper) cannot now be found in the British Museum. The presence of ocular 
‘lobes to the prothorax, the posteriorly widened, evanescent scrobes, the absence of 
scutellum, the exhumerate elytra, &c., seem to bring Synosomus near the Mexican 
genus Amphidees. 
* Not identified by Lacordaire. 
