PLEGADERUS.—BACANIUS. 237 
PLEGADERUS. 
Plegaderus, Erichson, in Klug’s Jahrb. der Ins. 1834, p. 2038. 
Five or six species of this genus inhabit the New World, all probably from North or 
Central America, and nine are found in Europe; none have been discovered as yet in 
Africa, and the only Asiatic species is from Japan. 
The different species are found beneath the bark or in the rotten wood of pine and 
other trees. 
1. Plegaderus monachus. 
Plegaderus monachus, Mars. Ann. Soc. Ent. Belg. xiii. p. 124 (1870)°. 
Hab. Guaremaa, Balheu, San Joaquin, San Gerénimo (Champion).—! Braziu }. 
Found in abundance beneath the bark of pines by Mr. Champion in three different 
localities in Vera Paz; the original locality is doubtfully given as Brazil by Marseul }, 
and is in all probability erroneous. 
2. Plegaderus comonforti. 
Plegaderus comonforti, Mars. Monogr. in Ann. Soc. Ent. Fr. 1862, p. 683 *, & 1861, t. 4. no. xlvi. 
fig. 1. 
Hab. Mexico 1, San Andres (Sal/é). 
BACANIUS. : 
Bacanius, Leconte, Proc. Ac. Phil. vi. p. 291 (1853). 
Bacanius does not contain nearly so many species as Acritus. It seems to be distri- 
buted much in the same way; and as the species are somewhat larger, it is possible a 
greater proportion of them have been found and described. ‘The known forms are 
chiefly from Europe and North and South America. They are found under the bark 
of trees. 
In this genus, as in Acritus, the scutellum is often small or inconspicuous. 
1. Bacanius scalptus, sp.n. (Tab. VII. fig. 10.) 
Ovalis, convexiusculus, rufus, subnitidus ; fronte transversim sat grosse strigosa; oculis angulatis, prominulis ; 
antennis flavis, scapo rufo; pronoto punctato, lateraliter strigoso ; scutello inconspicuo ; elytris strigoso- 
punctatis, stria 1° integra, antice arcuatim continuata; pygidio grosse punctato; prosterno transverso, 
lobo lato, punctato et minute strigoso, laterali marginato ; meso- metasternoque grosse punctatis; tibiis 
anticis arcuatis, multidentatis. Long. 2 millim. 
Hab. Guatemata, El Tumbador 2500 feet, El Reposo 800 feet, Zapote (Champion) .— 
AntILLES, Cuba (coll. Lewis). 
For so small an insect the sculpture of the exoskeleton is remarkable for its coarseness. 
B. scalptus comes nearest to B. tenuis, Mars., of the described species; but there are 
others more closely approaching it in collections as yet unnamed. It has one elytral 
stria, which apparently corresponds with the first stria in other Histeride: this starts 
