Lamellicorn Beetles. 17 
antenne, depressed body, and concealed labium, remove it from 
the Geotrupide, with which it however agrees in several important 
characters, such as the membranous lobes to the maxillz, notched 
fore tibia, horny mandibles, with the upper edge ciliated. The 
large exposed labrum also at once removes it from the Dynastide, 
Cryptogenius Miersianus, W. (PI. XII. fig. 1.) 
Nigricans, subnitidus, luteo-setosus; capite thoraceque circulis 
concentricis confluentibus sculpturatis ; elytris striis numero- 
sis tenue impressis irregularibus, spatio inter strias impres- 
sionibus ovalibus confluentibus, singulo tuberculis triplici 
serie ordinatis, costaque elevata laterali. Long. corp. lin. 33. 
Habitat in Nova Grenada. In Mus. D. Miers et Hope. 
D. Miers, Entomologus necnon Botanicus peritissimus, copiam 
ditissimam insectorum Americe meridionalis collegit, multas- 
que species singulares mecum benevolissime communicavit. 
Gzostus, Brullé, Exped. Sci. de Morée; Laporte, in Hist. Nat. 
ins. Col. 
(Hybalus, Dejean, Catalogue, 4giala pars Guérin, Icon. R. An.) 
(Pl. XII. fig. 2a—2c, and details.) 
This genus possesses a strong relationship with @gialia, not 
only in its short broad outline, but also in the dentated mandibles 
and structure of the maxillz ; the antennz are, however, 10-jointed, 
with a short basal joint, and the head cornuted in the males. Like 
Cryptogenius it possesses free joints in the clava of the antennz, 
the first of the club being however larger than either of the others; * 
hence, as well as from the denticulation of the mandibles and struc- 
ture of the maxillze, and but slightly exposed labial lobes, this genus 
must rank in the family Trogide. 
The upper lip is transverse, with the front margin strongly setose, 
and the angles rounded off. 
The mandibles have their lateral edges exposed, being thin, and 
dilated outwards, the right hand mandible being slightly bifid at 
the tip, whilst the left hand one has an acute apical tooth, and an- 
other stronger and more acute below the apex within; both have 
a broad bidentate tooth in the middle of the inner margin, below 
which is a deep notch. 
The maxillz have the upper lobe triangular, the point directed 
inwards over the inner lobe; its upper edge is furnished with several 
* The club of the antennz is incorrectly described by Laporte as infundi- 
buliform. 
