294 RH YNCHOPHORA. 
tion distinguishes this and the following species from all others of the genus except 
A, retusus, Eichh.* 
6. Amphicranus collaris, sp.n. (Tab. IX. figg. 10; 10 a, apex of elytra.) 
Oblongus, nitidus, glaber, ferrugineus, elytris nigris, abdominis segmentis tribus ultimis infuscatis; pro- 
thorace anterius constricto et lateraliter sinuato, supra ad apicem oblique rotundatim declivi, asperato ; 
elytris vix perspicue punctatis, post medium oblique excavatis, ad apicem brevius productis, anguste 
divaricatis, margine excavationis utrinque prope suturam unispinoso, prope apicem dente quadrato 
exstructo. 
Long. 4°2 millim.; lat. 1:4 millim. 
Oblong, moderately elongate, shining, glabrous, ferruginous, the elytra deep black. Head infuscate, the front 
flat below, dull, reticulate, with a few punctures, the mouth not fringed; antenne ferruginous, third joint 
of the funiculus very short and hard to distinguish, the club broad obovate, its outer face pubescent, with 
transverse sutures, the apical border ciliate with long hairs. Prothorax one-third broader than long, 
- obliquely constricted and bisinuate towards the apex, which is moderately rounded and bordered, sides 
somewhat rounded behind the constriction, humeral angles subrectangular, the base truncate; surface a 
little depressed along the base, subcylindrical to the anterior third, thence obliquely rounded and not 
strongly declivous to the apex, asperate over the anterior third, the asperities very fine behind and not 
arranged in lines, behind feebly reticulate and punctured, the punctures more perceptible towards the 
base, which is subimpressed on each side. Scutellum small, rounded, black. Elytra less than one-half 
longer than the prothorax, shortly produced at apex, with a very small narrow median emargination, 
truncate at base, with rounded humeral angles, the shoulders scarcely elevated, the sides feebly rounded 
and convergent behind, strongly incurved at the outer apical angles, the apical margins subtruncate ; 
surface subcylindrical, feebly punctured in rows, more perceptibly near the suture, excavate behind the 
middle ; fundus of the excavation concave, shining, rather closely punctured, the suture not elevated, its 
margins each with a pointed tooth above near the suture, preceded by a small tubercle, and with a short 
oblique quadrate lobe near the outer apical angle. Underside and legs ferruginous, the last three abdo- 
minal segments infuscate. 
Hab. Panama, Volcan de Chiriqui (Champion). 
One example. In colour this species resembles A. thoracicus, Er., but it is much 
* Amphicranus grouvellei, sp. n. 
Cylindricus, nitidus, niger vel piceo-niger, antennis pedibusque testaceis ; A. brevipennit omnino simillimus, 
sed duplo minor, angustior, elytris proportione longioribus, declivitate haud ante medium incipiente, 
margine laterali utrinque obtusius cuspidato. 
Long. 2°8 millim.; lat. -9 millim. 
Cylindrical, rather shining, black or pitehy-black, the antenne and legs testaceous or testaceous-brown. About 
half the size of A. brevipennis and more elongate ; the prothorax a little longer, less obtusely rounded in 
front, with the apical asperities not forming distinct lines, the elevation at the basal third less marked. 
Elytra distinctly longer than the prothorax, less evidently ampliated round the margins of the declivity, 
the latter beginning at and not before the middle, the marginal tooth on either side forming an obtuse 
cusp. 
Hab, ? Brazit. 
I have received two examples from M. Grouvelle; both were found in tobacco-refuse, probably Brazilian. 
In this species the length of the suture from the base to the summit of the declivity is six-sevenths of the 
width of the elytra; in A. brevipennis it is less than three-fourths of the width. Possibly 4. grouwvellei is a 
small form of A. brevipennis and not distinct. The differences in proportion justify its separation for the 
present. 
