COLEOPTERA OF BAJA CALIFORNIA. 325 



cylindrical, the former contiguous and with distinct tro- 

 chantin. The last joint of the tarsus with a setose 

 onychium, not at all prominent however in the present 

 genus. The tarsi are not lobed beneath, the third joint 

 acutely notched, the fourth small and not visible beyond 

 the emargination of the third. The first and fifth joints 

 are equal, the second and third nearly so, but shorter 

 than the other two. 



The head is transversely oval, slightly prolonged behind 

 the eyes and abruptly forming a neck. The eyes large, 

 rounded, slightly truncate in front, rather coarsely granu- 

 lated. Antennal tubercles spiniform. Antennae twelve- 

 jointed and flabellate (in the males) joints 3 to ii with a 

 slender branch which is slightly longer than the length 

 of the preceding part of the antenna?, that is to say the 

 branch from the third joint is longer than joints i to 3 of 

 the antenna; and so continuously. The terminal joint 

 and the branch from the preceding are equal in length. 

 The mandibles are falciform, prominent and strongly bi- 

 dentate at middle. The maxillary palpi are long, slender 

 and four-jointed, the second joint longest, third joint 

 two-thirds as long, fourth a little shorter than second and 

 slightly fusiform. Labial palpi slender and long, the 

 last two joints about equal in length. The mouth-parts 

 otherwise are feebly developed. Thorax conical with 

 slightly arcuate sides, the lateral border not very distinct. 

 Elj^tia broader at base than the thorax, sides convergent 

 to apices, these separately rounded, substance coriaceous. 



The comments above apply to the male ; the other sex 

 is unknown to me, but Mr. Bates describes the antennae 

 as half the length of the body, filiform and simple. 

 While I greatly regret to differ so radically from my la- 

 mented friend H. W. Bates in the systematic position of 

 this insect, the aggregate of its organization points to the 



