42 LAMELLICOENIA. 



AGAMOPUS. 



Gen, Aphengio affinis ; differt elytris margine haud carinatis, tibiis posticis tf apicem versus angnstatis, etc. 

 Oblongus, subdepressus, glaber. Oculi supra magni. Thorax fovea laterali obsoleta. Tibiee setosse ; 

 apice rectse truncatse ; intermedin (et $ posticae) gradatim et mediocriter dilatatse, posticse c? versus 

 apicem angustatse apiceque intus in spinam longam obtusam products}. Tarsi graciles, vix compressi, 

 4 posterioribus articulo basali parum elongato ; ungues valde elorigati, tenues. Mesosternum elongatum, 

 sutura postica subtili subangulata. Pygidium brevissimum. 



A genus allied to TJroxys and Aphengium, but distinguished from both and from all 

 other " Chceridiinee " by the form of the posterior tibiae, which in their gradual 

 dilatation are somewhat intermediate between those of Chceridium and Ca?ithon, and in 

 the remarkable form they assume in the hindmost pair of the male resemble those 

 of no other genus. The hind femora of the male have on the under surface a straight, 

 finely-serrated edge, ending before the apex in a short sharp tooth. 



1. Agamopus lampros. (Tab. II. fig. 20, <s .) 



Niger vel castaneo-fuscus, politissimus, pedibus castaneo-rufis ; clypeo bidentato et vix pnnctato, fronte et vertice 

 politis ; tborace brevi et lato, diseo subtilissime, lateribus fortius disperse, punctatis, margine laterali 

 rotundato, basi immarginato ; elytris subtiliter striatis, striis distanter crenato-punctulatis, interstitiis 

 planis, laevibus ; mesosterno, metasterni lateribus abdominisque segmentorum marginibus grosse punctatis; 

 pygidio brevi. 



Long. 4§ millim. 



Hab. Panama, Bugaba, Volcan de Chiriqui, David (Champion). 



APHENGIUM. 



Aphengium, Harold, Col. Hefte, iii. p. 54 (1868). 



The only species of this genus hitherto described is from Monte Video. 



1. Aphengium semi-nudum. (Tab. II. fig. 21.) 



Oblongum vix ovatum, parum convexum, nigro nitidum (interdum subseneum), setulis brevissime obsitum, 

 supra undique subsequaiiter discrete punctulatum ; clypeo medio obtuse unidentato vel sub-bidentato ; 

 thorace a5qualiter parum convexo, fovea laterali vix impresso, margine laterali subrecto, prope angulos 

 anticos citius curvato; elytris subtilissime punctulato-striatis; corpore subtus femoribusque, metasterno 

 medio sparsius et subtilius, abdomine pygidioque crebrius, punctatis ; tarsis posticis latis, compressis, dense 

 rufo ciliatis, articulo 1° breviter triangulari; pygidio retracto, subborizontali. 



Long. 6-7 1 millim. 



Eab. NiCAEAGUA, Chontales (Belt) ; Panama, Volcan de Chiriqui (Champion). 



The marginal carina of the elytra is sharper than in A. sordidum, and is continuous 

 from the rectangular (almost acute) shoulders to the sutural apex. The short and 

 broad, compressed and subtriangular tarsal joints are a remarkable distinguishing 

 feature. The anterior cavity of the presternum is exceedingly deep. 



A specimen from the Volcan de Chiriqui is figured. 



