296 RHYNCHOPHORA. 
the posterior third (measured along the suture), undulate, shining, strongly punctured, its margin pilose 
with long hairs and subserrate, armed on each side with a blunt tooth close to the suture, thence 
extending obliquely downwards to the middle point, whence it is produced horizontally backwards to 
form the upper border of the apical process, the latter with a sharp inwardly directed tooth at its upper 
apical angle, its inner face concave, pilose. Underside behind the prothorax infuscate, the abdomen 
rufescent at apex ; prosternum very long before the anterior cox, its precoxal border quite straight. 
Legs testaceous. 
Hab. Mexico, Omilteme in Guerrero (ZH. H. Smith). 
One specimen. This species is in all respects a normal member of that section of 
the genus which includes the smaller and more elongate forms, except that the third 
joint of the funiculus is evanescent. 
9. Amphicranus terebella, sp. n. (Tab. IX. figg. 13 ; 13 a, apex of elytra.) 
Linearis, sat nitidus, glaber, testaceus, elytris flavo-testaceis, ad apicem rufescentibus ; prothorace latitudine 
fere duplo longiore, apice rotundato, oblique declivi, margine subreplicato ; elytris illo vix sesqui longi- 
oribus, ad apicem longe productis, separatis, superne tenuiter lineato-punctatis, declivitate obliqua, nitida, 
levi, ambitu utrinque serrato et spina longa armato, processu intra apicem dente acuto instructo. 
Long. 2°8 millim. ; lat. -63 millim. 
Cylindrical, linear, four and a half times longer than broad, rather shining, glabrous, testaceous, the 
prothorax reddish, the elytra yellowish, becoming ferruginous at apex, with the margins and spines 
almost piceous. Head concealed in the type; antenne testaceous, the funiculus triarticulate, the club 
oval, pubescent, the first suture scarcely, the second evidently curved. Prothorax cylindrical, nearly 
twice as long as broad, circularly rounded at apex, with a slightly reflexed margin, parallel-sided, the 
hind angles rectangular, the base truncate; surface obliquely declivous and convex in front, asperate, 
the asperities forming a single raised line parallel to the margin and becoming imbricate behind, 
horizontal portion moderately shining, sparsely punctured. Scutellum acute triangular, impressed, 
testaceous. LElytra at base narrower than the prothorax and almost one-half longer, the shoulders obtuse, 
the sides oblique at the base, thence parallel to the apical processes, which are twice as long as broad, 
having the outer margin slightly curved and rounded at the outer apical angle and separated by a space 
one-half longer than broad, and widened posteriorly ; surface shining, with rather remote lines of fine 
punctures ; excavation beginning behind the posterior third, measured along the suture, oblique, shining, 
nearly smooth, its borders somewhat oblique above, acute, finely serrate and with a long subacute spine 
on each side, behind which they are continued in an oblique curve to form the upper border of the apical 
processes ; inner face of the latter flattened, with a sharp conical tooth near the tip of the inner border. 
Underside and legs testaceous. 
Hab. Panama, Volcan de Chiriqui (Champion). 
One specimen. A curious little insect, remarkable for the extremely long and 
narrow thorax; in form it represents the opposite extreme to that found in such 
typical members of the genus as A. thoracicus, Er. 
10. Amphicranus fastigatus, sp. n. (Tab. IX. fige. 14; 14a, head and 
prothorax ; 14 6, apex of elytra.) 
Linearis, cylindricus, sat nitidus, glaber, testaceus, elytris pallidioribus, his cum prothorace ad apicem 
infuscatis ; antennarum clava ovali; prothorace in processum acuminatum supra caput producto ; elytris 
ante medium obliquissime excavatis, ad apicem in processus longos parallelos productis, margine excava- 
tionis utrinque prope suturam tridentato et in medio dente fortiori armato, 
Long. 4°2 millim. ; lat. 1 millim. 
