256 PHALACRIDA. 
1. Liophalacrus bicolor, sp. n. (Tab. VII. fig. 21.) 
Hemisphericus, nitidus, levigatus, testaceus, supra niger; elytris dimidio basali rufo, apicem versus stria 
suturali subtili; antennis articulis nono et decimo nigris. 
Long. 2 millim. 
Hab. Panama, Bugaba 1000 feet (Champion). 
Antenne with the terminal joint paler than the penultimate two, and about equal to 
them in length. Thorax with a short broad median lobe, which is feebly margined 
behind. Scutellum small. Elytra with the basal half red, the apical half black ; 
impunctate and estriate, but with a fine and short sutural stria on the apical portion. 
A small series of eight examples was found of this easily recognized insect. 
2. Liophalacrus rotundus, sp. n. 
Hemisphericus, nitidus, levigatus, fusco-testaceus, supra niger, elytris versus basin macula vaga rufa striaque 
suturali munitis ; antennis ante apicem nigris. 
Long. 27 millim. 
Hab. Panama, Volcan de Chiriqui 3000 feet (Champion). 
Antenne with elongate club, the terminal joint long. Thorax with a well-marked 
median lobe. Elytra almost destitute of any traces of punctures, but with a well- 
defined sutural stria extending halfway to the base. Unique. 
Allied to L. bicolor, but larger, with longer club to the antenne, the red area on the 
elytra smaller, and the sutural stria more elongate. 
3. Liophalacrus (?) —— ? 
Hab. Panama, Volcan de Chiriqui 2500 feet (Champion). 
A single mutilated example much resembling such examples of Olibrus porrectus as 
are quite black, but apparently belonging to Liophalacrus. 
ACYLOMUS, gen. nov. 
Tarsi posteriores articulo primo brevi cum secundo consolidato, hoc elongato, tertio parvo. Prosternum latum, 
apice setis rigidis armatum. Metasternum inter coxas intermedias latum, longe productum, anterius 
truncatum, haud rotundatum. 
The form is here short, as is usual in Phalacrus ; but the genus is allied to Eustilbus, 
from which it differs by the first and second joints of the hind tarsus being quite 
consolidated, and the second of them greatly elongated, by the metasternum being 
very prominent, and the mesosternum in front of it reduced to a mere margin. The 
suture between the first and second joints of the hind foot is not easily seen, but occurs 
at about the line of the tibial ciliz, the basal joint being only about one third of the 
length of the following joint ; the third joint and the terminal joint are about equal 
in length. The spurs of the tibie are moderately long. The hind femora are very 
broad. 
