PACIFIC COAST COLEOPTERA. 71 



HoLOPLEURA Helena Lee. — Dead twigs of Umbellularia 

 Californica. 



Rosalia funebris Mots. — Decaying Umbellularia Cali- 

 fornica among the mycelia of some fungus. 



Xylotrichus nauticus Mann. — Dead sapwood of the oak, 

 Quercus agrifolia. 



Xylotrichus planifrons Lee. — Dead branches of willow. 



Necydalis l^vicollis Lee. — Decayed oak, Quercus agri- 

 folia, and in dead Eucalyptus globulus. 



Leptura l^ta Lee. — Dead Quercus agrifolia and Quer- 

 cus sp. 



Leptura crassipes Lee. — Decayed wood of Umbellularia 

 Californica. 



Synaphoeta Guexi Lee. — Dead limbs of California buck- 

 eye, iEsculus Californica. 



PoGONOCHERUS CRINITUS Lec. — Dead branches of Quercus 

 agrifolia. 



TROGOSITID^. 



Trogosita yirescens Fab. — Dead Libocedrus and several 

 kinds of oak. 



CLERID^. 



Thanasimus eximius Mann. — Dead twigs of Umbellularia 

 Californica. 



Among many entomological enigmas of long standing is 

 one that is about being solved. From time to time in many 

 parts of the United States, large luminous larvae of some 

 Coleopteron have been found, and it has been conjectured 

 that these larvae belong to some of the Elateridae, the gen- 

 eral supposition being that they were larvae of the genus 

 Melanactes. Every attempt at breeding them resulted in 



