638 PROGHJEDINGS OF THE NATIONAL MUSEUM. vol. 57. 



Larvae from Cerambycid galleries in Oregon oak, Ashland, Ore- 

 gon. G. Hofer, collector. 



Larvae from Neoclytus-infested white oak, Catalina Mountains, 

 Arizona. M. Chrisman, collector. 



CHARIESSA PILOSA Forster. 



Is a predator on primary and secondary wood and bark borers, 

 among which are Scolytus J{.-spinosus and Magdalis olyra in hickory ; 

 Cerambycid and Buprestid borers beneath bark and in wood. Is the 

 most common eastern Clerid. It has been reared from oak, hickory, 

 walnut, sassafras, linden, grape, birch, chestnut, and rarely in conif- 

 erous trees. It undoubtedly attacks borers in any tree or wood. 



Adults begin to emerge during May and June and are attracted to 

 infested trees. They are active during daytime and may be seen 

 throughout the summer months, mating, ovipositing, and searching 

 for prey. They feed upon small insects that are attracted to the in- 

 fested trees. The eggs are placed in crevices in the bark or in wounds 

 and galleries made by the borers. 



Upon hatching the larvae begin at once to search for prey, travel- 

 ing through the larval mines of the borers. In relation to Magdalis 

 olyra in hickory saplings, the Clerid larvae were about one- fourth 

 inch long by August 15. They fed until cold weather arrived, being 

 three-eighths to one-half grown. They overwintered in the mines 

 of the host, resuming the attack in the spring. These larvae con- 

 tinued in this tree for one year after the Magdalis had emerged, mak- 

 ing a total of two years in the larval stage. 



During the second year they were found in the galleries and mines 

 of secondary borers. Overwintered again in immature larval stage, 

 pupating in the spring. Whether this was the exception or the rule 

 is yet to be determined, although some unfinished observations in 

 connection with Scolytus ^-spinosiis were very similar. 



First pupae observed May 12 to 15 (Connecticut and New York) 

 in trees abandoned by barkborers previous June. 



O. pilosa does not construct a special pupal cell, but utilizes the 

 gallery or cell of a wood borer. The pupae are bare in the cell. 



Distribution : Eastern half of the United States. 



Observations made by most of the attaches of the forest insect 

 branch. 



Genus PELONIUM Spinola. 



PELONIUM LEUCOPHAEUM Klne. 



Reared from branches of Taxodium containing young larvae of 

 Cerambycidae ; also from section of small cypress. Adult collected 

 flying about cut branches of juniper containing Cerambycid larvae 

 November 21. Observations by W. F. Fiske. 



