420 CALIFORNIA ACADEMY OF SCIENCES. 



This species was described as aProbosca, but for what 

 reason is not evident. Mr. Champion in the Biologia has 

 properly indicated its position in Oxacis. 



Occurs not rarely at Cabo San Lucas, Baja California, 

 and I have one from Yuma. 



Oxacis debilis n. sp. 



Form slender, elongate, pale yellowish testaceous, very 

 sparsely pubescent. Head sparsely, obsoletely punctate. 

 Thorax not longer than wide, sides arcuate in front, 

 oblique posteriorly, disc somewhat irregular, obsoletely 

 coarsely, not densely punctate, the surface alutaceous. 

 Elytra rather shining, obsoletely costulate punctate, but 

 nearly smooth at apical third. Body beneath pale, sparsely 

 punctate and pubescent. Legs pale. Length .22— .26 

 inch.; 5.5-6.5 mm. 



This species resembles some of the paler forms of 

 lucana, but it is more slender, with smoother elytra. The 

 maxillary palpi have a cultriform terminal joint. The 

 claws are toothed at base, but less acutely than in lucana. 



Two specimens, Yuma, California. 



Rhinoplatia Horn. 



Form slender. Head produced in a moderately long 

 beak. Eyes oval, oblique, distant from the thorax, finely 

 granulate. Antennas slender, eleven-jointed, inserted at 

 base at some distance from the eyes. Mandibles acute 

 at tip. Maxillary palpi slender, the last joint triangular, 

 apical side arcuate. Anterior tibia? with two slender 

 spurs, the penultimate joint of tarsi alone spongy be- 

 neath. Claws not toothed, simply thickened at base. 



In this genus the beak is fully as long as wide, the sides 

 parallel. It seems to represent in our fauna Chitona or 



