AMPHICRANUS. 295 
smaller, with the underside ferruginous, the prothorax not abruptly declivous, and the 
elytra differently constructed. 
7. Amphicranus tenuis, sp. n. (Tab. IX. figg. 11; 114, apex of elytra.) 
Linearis, cylindricus, nitidus, ferrugineus, prothorace anterius subinfuscato, elytris piceo-nigris ; illo ad apicem 
subconstricto, supra caput subproducto, oblique convexe declivi, margine antico replicato; elytris subtiliter 
punctatis, posterius oblique excavatis, ad apicem longe productis, et sat late discretis, ambitu utrinque 
superne unispinato, pagina processus interiore in medio dente singulo armata. 
Long. 3:4 millim. ; lat. -8 millim. 
Linear, cylindrical, shining, ferruginous, the elytra piceous-black. Head infuscate ; antenne testaceous, 
funiculus distinctly triarticulate, club oval, thinly pubescent, its sutures curved. Prothorax more than 
one-half longer than broad, parallel-sided, strongly rounded and slightly narrowed at apex, somewhat 
produced beyond the head, its anterior margin reflexed, the hind angles subobtuse, the base truncate ; 
surface subinfuscate anteriorly, obliquely and rather abruptly declivous at apex, and asperate with strong 
elevations in two or three concentric lines, moderatly shining behind, with uniform scattered fine 
punctures and delicate close reticulation. Scutellum small, acute triangular, impressed. Elytra as wide 
as the prothorax and one-half longer, truncate at base, the humeral angles rounded, the sides parallel, 
slightly convergent outside the apical processes, the latter obliquely rounded at the tip, separated by a 
space deeper than its width and wider than the processes ; surface shining, finely punctured in rows, 
excavation beginning at the hinder third (measured along the suture), oblique, dull and subimpunctate, 
its margins glabrous, oblique above, with a small tooth close to the suture followed by a larger acute 
spine, after which they form the nearly horizontal upper boundary of the apical process and are indistinctly 
toothed at the junction with its posterior border; inner face of the process with a small sharp tooth close 
to the middle of the upper border. Underside and legs fusco-ferruginous. 
Hab. t MExico. 
I have received one specimen, believed to be from the refuse of Mexican tobacco. 
s. Amphicranus filiformis, sp. n. (Tab. IX. figg. 12; 124, apex of elytra.) 
Angustissimus, sat nitidus, capite et prothorace testaceis, hujus apice anguste nigro-maculato ; elytris sordide 
stramineis, lateribus et apice nigricantibus, subtus post prothoracem infuscatus ; antennis pedibusque 
testaceis ; prothorace latitudine sesqui amplius longiore, apice rotundato sat fortiter declivi; elytris 
subtiliter lineato-punctatis, posterius oblique excavatis, ad apicem longe productis, margine excavationis 
ciliato, supra ad suturam utrinque unidentato. 
Long. 4 millim.; lat. 8 millim. 
Very long and narrow ; moderately shining. Head testaceous, the mouth infuscate, front flattened and rather 
dull, glabrous, with short oral fringe ; antennx testaceous, third joint of the funiculus indistinct and 
fused with the club, the latter obovate, rather narrow, of moderate size, with curved sutures, thinly 
pubescent, with short scale-like hairs intermingled with a few longer ones and absent over the basal half 
of the first joint. Prothorax three-fourths longer than broad, cylindrical, truncate at base, the hind angles. 
younded, sides parallel, the apex rather strongly rounded and very slightly constricted ; surface somewhat 
strongly declivous and convex in front, the anterior opening oblique and not horizontal, testaceous, the 
declivous portion black at the apex, with a light median line, asperate with coarse granules and finely 
pubescent, the horizontal portion shining, finely and sparingly punctate, subasperate with transverse 
ruge and slightly infuscate over the base. Scutellum rather large, rounded, black, shining. Elytra as 
wide as the prothorax and nearly one-half longer, prolonged into two parallel processes, truncate at the 
base, the humeral angles obliquely rounded, the sides parallel, the processes obtusely rounded at apex 
and separated by a space nearly equal to either of them in width and about one-half longer than wide ; 
surface cylindrical, obscure stramineous, with the sides and apex black, finely punctured in lines, the 
punctures appearing as blackish spots in the substance of the elytra; declivity oblique, beginning behind 
