50. Coleoptera-Anthribidae from Juan Fernandez. 
By 
K. JORDAN. 
One species was obtained on Juan Fernandez representing a new genus. 
Opisolia gen. nov. 
2. Generi Encyclotropis Jord. (1904) dicto affinis; rostro truncato, anten- 
narum fossa tringulari obtecta atque segmento tertio longiore crassioreque, 
metasterno inter coxas medias et posticas brevissimo distinguenda. 
Proboscis more than one-half broader than long, truncate, its apical 
margin very slightly incurved; dorsal margin of antennal groove cariniform, 
somewhat elevate, concealing the groove in dorsal aspect. Eye lateral, sub- 
truncate in front, not sinuate, the interspace between it and the antennal groove 
about as wide as the second segment of the antenna is broad near apex. 
Antenna reaching to basal margin of elytra, rather thick, segment 2 claviform, 
3 to 8 conical, 3 one-half longer than 2 and a little longer than 4, 5 to 8 very 
slightly shorter and thicker than 4, 8 about twice as long as broad, club dis- 
tinct, a little over one-half broader than 8, 9 + 10+ 11 slightly shorter than 
6+ 7+ 8, 10 as long as broad, truncate at apex, with the side rounded, 11 
ovate, proximally truncate, longer than broad. 
Prothorax transverse, one-third broader than long; dorsal carina almost 
straight in middle, then evenly curved forward, but soon disappearing, the 
sides of the pronotum cariniform to beyond middle, but not to apex; no lateral 
longitudinal carinula behind the dorsal carina. 
Elytra truncate at base, cylindrical, but short and almost gradually roun- 
ded from base to apex, neither with sutural depression nor with subbasal 
swelling, basal margin elevate, the rows of punctures almost restricted to basal 
half. Pygidium semicircular. 
Prosternum somewhat swollen before the coxae, which are separate. 
Intercoxal process of mesosternum narrow, truncate. Metasternum very short, 
the elevate margins of the mid- and hindcoxal cavities almost touching one 
another. Legs short, first segment of tarsi twice as long as broad, as long as 
2 and 3 together. 
