( 451 ) 
Adnotalio. — Antecedenti similis Cryphalus cavus Leconte 
(Syn. Scol., app., p. 155) esse videtur, quare diagnosem auctoris 
verbotenus afferre liceat : 
C. cavus. — Black, moderately shining, elytra brown, darker 
towards the tips, antennae yellowish, feet brown; head convex, 
strongly not densely punctured ; prothorax finely roughened near 
the tip, nearly smooth behind, about one third longer than wide, 
parallel on the sides, obtusely rounded in front; elytra very finely 
punetulate and rugose, posterior declivity deeply excavated and 
hairy, with its margin strongly elevated for more than one half 
the extent, ending in an acute cusp, above which, continuing the 
outline of the declivity and nearer the suture are three other 
smal denticulations; the suture along the declivity is elevated. 
Long. 5,5 mm. 
Patria : California. 
10. P. EXILE, n. sp. 
Parvum, oblongum, piceo-brunneum, glabrum, subnitidum, 
thorace breviore postice laevi, elytris versus apicem rotundato- 
attenuatis, apice triangulariter excavalo-retusis, ambitu anguste 
calloso-elevato, supra bituberculato, fundo laevi. 
Long. 1,5 mm. 
Perparvum, piceo-brunnum, antecedentibus proportione cor- 
poris brevius, elytris apice excavato-retusis, fundo laevi, ambitu 
calloso superne 2-dentato née non struetura capituli antennarum 
a ceteris discedens. Caput retractum, nigro-piceum, fronte antice 
depressa punctulata. Oculi nigri, antice emarginati. Antennae 
testaceae, capitulo subinfuscato, pagina externa convexa, nitidiu- 
scula, tenue pubescens, suturis duabus rectis in transversum 
notato. Prothorax latitudine paulo longior, basi truncatus, angulis 
posticis et lateribus rectis, a quadrante antico cum apice rotun- 
datus, margine apicali subtiliter crenulato; dorso convexus, piceo- 
