AGATHIDIUM. 75 
Omnino contractibile, orbiculare, nigrum, nitidissimum, glaberrimum; capite magno, antice lato, punctis 
exiguis, remotis, indistincte notato, epistoma integra, una cum ore flavescente; oculis modicis, vix promi- 
nentibus ; pronoto quam caput multo longiore, validissime convexo, duplo latiore quam longo, translucide 
piceo, lateribus una cum basi continuo rotundatis et leviter marginatis, angulis anterioribus rotundatis et 
valde prominentibus ; elytris semiorbicularibus, angulis inferioribus humeralibus obsoletis, superficie im- 
punctata sed inequali, capite atque pronoto fere pariter longis et latis, ad media latissimis, stria 
suturali brevissima ad apices impressis, apicibus haud acuminatis, lateribus sat late marginatis, margine 
ipsa rufo-picea; pedibus sat longis, rufo-piceis ; antennis sat longis, rufescentibus, clavis obscurioribus. 
Long. corp. 153" lin, =3-25-3'50 millim. 
Body perfectly contractile, orbicular, black, very smooth and shining. Head large, broad in front, indistinctly 
marked with minute, remote punctures; epistoma not emarginate, and, together with the mouth, flavescent ; 
eyes moderate, slightly prominent ; antenne rather long, rufescent, with the club dusky. Thorax exceed- 
ingly convex, much longer than the head, and twice as broad as long, transparently piceous; sides and 
base continuously rounded and slightly margined; anterior angles rounded and very prominent. Llytra 
semiorbicular, with the inferior humeral angles obsolete, impunctate but uneven on the surface, as long 
and as broad as the head and thorax, widest at the middle, with a very short sutural stria at the apex: 
sides rather broadly margined, with the margin rufo-piceous ; apex not acuminate. Legs rather long, rufo- 
piceous. Underparts rufo-castaneous ; mesosternum faintly carinated ; metasternum dusky and alutaceous. 
Hab. Nortu America !?, Pennsylvania *.—MeExico, Jacale (Sallé). 
2. Agathidium californicum. 
Agathidium californicum, Horn, Trans. Am. Ent. Soc. viii. p. 303. 
Omnino contractibile, fere orbiculare, nigrum, nitidissimum, punctis remotis obsoletissimis impressum ; capite 
magno, indistincte alutaceo, antice lato; epistomate ad medium sinuato, reflexo, flavescente; oculis sat 
magnis prominentibus; ore flayo; pronoto quam caput vix longiore, fere duplo latiore quam longo, valde 
convexo, indistincte alutiaceo, basi atque lateribus continuo rotundatis et leviter marginatis, angulis ante- 
rioribus rotundatis et valde prominentibus; elytris subovatis, quam caput atque pronotum parum longi- 
oribus, haud latioribus, ante media latissimis, indistincte alutaceis, stria suturali profunda ab apice usque 
ad medium impressis, lateribus marginatis, margine dilutiore, apicibus sat acuminatis ; pedibus modicis, rufo- 
ferrugineis ; antennis modicis, articulis sex basalibus rufis, ceteris obscurioribus. Long. corp. 1,% lin.= 
2°25 millim. 
Body perfectly contractile, almost orbicular, black and very shining, marked with remote, very obsolete punc- 
tures. Head rather large, indistinctly alutaceous, broad in front, epistoma flavescent and sinuated in the 
middle; mouth yellow; eyes rather large, prominent ; antennz moderate, with the basal six joints rufous, 
and the remainder dusky. TZ'horaa scarcely longer than the head, nearly twice as broad as long, very 
convex, indistinctly alutaceous ; the sides and base continuously rounded and slightly margined ; anterior 
angles very much produced and rounded. Slytrarather ovate, somewhat longer but not broader than the 
head and thorax, widest before the middle, indistinctly alutaceous, with a deeply impressed sutural stria 
extending from the middle to the apex; sides margined, the margin pale; apex rather acuminate. Legs 
moderate, rufo-ferruginous. Underparts rufo-castaneous ; mesosternum carimnated; metasternum aluta- 
ceous. 
Hab. Nort America, California, Nevada, and Washington territory }.—GUATEMALA, 
Quiche Mountains, 7000 to 9000 feet (Champion). 
3. Agathidium exiguum. 
Agathidium exiguum, Melsh. Proc. Ac. Phil. ii. p. 103 (1844)'; Horn, Trans. Am. Ent. Soc. viii. 
p- 303”. 
Omnino contractibile, orbiculare, nigrum, glaberrimum, uitidissimum, punctis exiguis, remotis, indistinctissimis 
impressum ; capite magno, lato, clypeo lato, rotundato, margine reflexa, antice emarginato, epistomate sat 
L* 2 
