48 OTIORHYXCHID.^. [Ho rn. 



THRICOMIGUS n. g. 



Rostrum slightly longer and narrower than the head, feebly arcuate, very 

 slightly dilated at tip, base cylindrical and with transverse impression, tip 

 very feebly emarginate. Scrobes moderately deep in front, rapidly evanes- 

 cent posteriorly, very feebly arcuate and directed toward the lower portion 

 of the eye. Antennae moderate, scape gradually clavate, slightly passing 

 the middle of the eye ; funicle 7-jointed, joints 1-2 longer, the first longer 

 than second, 3-7 moniliform ; club oval, pointed. Eyes broadly oval. 

 Thorax oval, slightly broader than long, apex and base truncate, sides 

 moderately arcuate, lobes very short, fimbriate. Scutellum short, broad. 

 Elytra regularly oval. Metasternum short, side pieces moderate, suture 

 distinct. Intercoxal process moderate, truncate in front, second segment 

 longer than the two following united, suture distinctly arcuate. Anterior 

 tibiae denticulate within, this and the middle tibiae mucronate at tip. Artic- 

 ular surfaces of hind tibiae sub-cavernous, tip not mucronate. Tarsi normal. 

 Body above densely scaly and pilose.' 



The unique species composing this genus resembles a large Phyxelis 

 glomerosus but is relatively more elongate. The aloe of the rostrum are 

 slightly prominent, and the scrobes are rather better visible from above 

 than beneath, but are not superior as in Phyxelis, and do not differ notably 

 from those of the genera placed by Lacordaire in the present tribe. 



T. luteus, n. sp. 



Form oval, surface densely covered with pale ochreous scales, in some 

 specimens slightly cupreous, and with short erect hairs. Head and rostrum 

 as long as the thorax, moderately densely scaly, scales at the sides paler, 

 and with erect, short, brownish hairs sparsely placed. Thorax slightly 

 broader than long, slightly narrower at apex, sides moderately and regu- 

 larly arcuate, apex and base truncate, disc moderately convex, densely 

 scaly, sparsely hairy. Elytra oval, humeri broadly rounded, disc mode- 

 rately convex, striate, striae with moderate, not densely placed punctures, 

 intervals flat densely scaly, scales paler at the sides, each interval with two 

 rather irregular rows of erect, brownish, short setae. Body beneath less 

 densely scaly than above. Legs sparsely scaly and with longer hairs than 

 the body. Length .28-. 30 inch ; 7-7.5 mm. 



Occurs in Bitter Root Valley and in Colorado. 



AMNESIA n. g. 



Rostrum slightly longer and narrower than the head, cylindrical at base 

 and with transverse impression, apex slightly broader, alae very feebly 

 prominent, tip feebly emarginate. Scrobes moderately deep and well de- 

 fined anteriorly, feebly arcuate, rapidly evanescent and feebly limited 

 posteriorly, directed toward the lower portion of the eye. Antennoj 

 moderate, sub-apical, scape gradually clavate, attaining the middle or 

 posterior border of the eye, funicle 7-jointed, first two longer and sub-equal, 

 3-7 shorter, usually obconical, sometimes longitudinally ovate, club oval, 



