35 



number planted. After a time many were cut down and piled to sea- 

 son with bark in situ; after several niontlis' time the logs were over- 

 hauled and found to be perforated in all directions by a borer. The 

 canals were filled with excrementitious matter; the subcortical farrows 

 formed a dense network over the surface of the wood, partly involving 

 the bark. Logs a foot in diameter were completely perforated. Many 

 dead and living beetles were taken from the burrows ; numerous larvae 

 were also obtained. Actual experience proved that such logs were 

 absolutely useless even for posts, as rapid decay was induced by the 

 entrance of moisture to the deeper parts. 



Desmocerna auripeimis Ohev. — Bred from the dead wood of Sambucus 

 glaucus. 



Ipochus fasciatus Lee. — Larvae taken from the wood of Ehus integri- 

 folia at Coronado, and Bhus laurina at Poway. — I. pubeseens Casey is 

 similar in habits. 



CHRYSOMELID^. 



Lema nigrovittata Guer. — In both the larval and imaginal states feeds 

 upon the leaves and flowers of Datura meteloides. The eggs are laid 

 in clusters of four to eight on the under side of the leaves. The larvae 

 cover themselves with excrement. They also feed on the cultivated 

 Baturw, Biirgmansice, and Cestruni aurantiacmn. Sinea diadema, a pre- 

 daceous Hemipteron feeds upon the larvae. 



Trirhabda luteocincta Lee. — The larvae and beetles feed upon Arti- 

 misia californiea. The larvae first appear in February, and after attain- 

 ing their growth descend into the ground to pupate. The first beetles 

 appear by the last of April. 



Ealtica torqiiata Lee. — Feeds upon the leaves of the Grape-\ine and 

 Adenostoma sparsifoUa. 



TENEBRIONID^. 



Phloeodes diabolicus Lee. — I have taken the larvae and pupae of this 

 species from the decaying stumps of the Live Oak. These beetles feed 

 on a large, tough species of fungus which grows upon the Oak. Once 

 I took thirty specimens from one large fungus. 



Iphthimus lce^nssi'nms Casey.— An immature beetle was taken from a 

 stump of a Live Oak. 



Gnathocerus corniitus Fab. — Observed in all stages of development in 

 ground cereals of the stores. 



CALANDRID^. 



Scyphophorus acupunctattis Gyll. — I have found this species upon the 

 trunks of graj^evines at Poway; it feeds ui)on tlie sap. 



Scyphophorus yuccw Horn. — Feeds upon the sap of the Yucca wMpplei 

 The larvae live within the caudex. 



