272 AMERICAN COLEOPTERA. 



Brownsville, Texas, July. 



This species differs from walshii in its straight basal carina of the 

 thorax, feebly lobed at middle in waUhii, the less prominent hind 

 angles of the thorax, the much denser pubescence and the slightly 

 more compact antennal club. 



Eusphyrus arizonensis n. sp. — Form, size and coloration as in walshii, 

 from which it differs in the denser pubescence, more irrorated with paler spots, 

 the basal carina of thorax relatively feebly lobed at middle and the more com- 

 pact antennal club, the latter is larger and more loosely jointed in walnhii. 

 Length 3 mm. 



Huachuca Mts., Arizona. 



This species is very close to walshii, of which it may prove to be 

 a variety, but the differences mentioned above are constant in the 

 small series which I have seen. 



GRIBUR10S0!»I4 n. gen. 



Head feebly convex ; beak slightly more than twice as broad as 

 long, sides dilated over the antennal cavities, sinuate near the eyes, 

 obliquely rounded at apical angles and sinuate at middle of apex ; 

 eyes slightly oval, not oblique, emarginate below ; antennal cavities 

 large, distinctly limited in front of eyes ; vertical and somewhat 

 triangularly shaped, antennae very short, as long as the head and 

 beak, first and second joints equal, stouter than the others, three and 

 four equal, fifth nearly as long as fourth and slightly wider, sixth to 

 eighth gradually decreasing in length, ninth to eleventh forming a 

 somewhat compact club; false mentum deeply arcuately emarginate, 

 lobes obtuse at apex. Prothorax wider at base than long, longer 

 dorsally than laterally ; carina feebly antebasal, slightly arcuate at 

 middle, recurved at side and extending not quite to the middle, 

 inferior basal carina visible at sides and connected with the subba- 

 sal carina at hind angles. Elytra about twice as long as prothorax, 

 strongly declivous at apex. Pygidium slightly broader at base than 

 long, narrowing to the rounded apex. Hind femora as long as 

 abdomen, tarsi as long as the tibiae, first joint of hind tarsi as long 

 as the following, second joint short, covering the third, claw joint 

 longer than the second joint, claws feebly toothed. Anterior coxse 

 nearly contiguous. Mesosternal process vertical, slightly narrowing 

 to apex, which is rounded. 



Type. — Grihuriosoina platanum n. sp. 



