88 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



One larva pupated on March 18 and transformed to an adult 

 April 8, and another pupated on March 22, and transformed on 

 April 15. 



On April 4, 1916, another examination of these logs was made. 

 Mr. Herbert found an Oryssus pupa in what appeared to be the 

 pupal cell of the Buprestid Chrysophana placida. At the same 

 time the writer found a large Oryssus pupa in the pupal cell 

 of Buprestis laeviventris. This transformed to a large female on 

 April 19. 



At the last examination of the logs on May 27, Mr. Herbert 

 " noticed an Oryssus female crawling over the same log from 

 which we had obtained specimens of Oryssus Buprestis laevi- 

 ventris, Buprestis aurulenta, Chrysophana placida, and Leptura 

 laetifica. She was examining the log very carefully, sweeping 

 her antennae across the surface of the wood at every step. She 

 systematically covered most of the log, going, the length of it three 

 different times and covering certain areas 6 or 8 different times. 

 After thirty-five minutes she apparently found a spot to her 

 liking, which she covered several times. She finally placed her 

 body at an angle of 15 to 20 degrees with the surface of the wood, 

 with the abdomen against the wood, and began boring with the 

 ovipositor. After 4| minutes she pulled the ovipositor out and 

 began examining the log again when she was captured. During 

 the boring her body and antennae quivered all the while." The 

 spot on the log where she had bored was marked and examined. 

 The hole made by the ovipositor was followed for f of an inch 

 until lost in the boring dust of a Buprestis larval mine. 



Besides the records which point to the parasitic nature of 

 Oryssus occidentals the following records have been made: by 

 the writer June 23 to July 7, 1906, four males and four females, 

 at Summerdale, Calif., crawling on a weather beaten white fir 

 (Abies concolor) log at an old mill; May 31, 1912, a female near 

 Yreka, Calif., crawling over the trunk of a yellow pine (Pinus 

 ponderosa) peeled during March, 1912, in the control work against 

 the western pine beetle (Dendroctonus brevicomis) ; July 17, 1915, 

 an adult male and female at Fallen Leaf, Calif., crawling up and 

 down an old dead white fir (Abies concolor) stub; August 4, 1915, 

 near Vacle, Calif., a female crawling on the trunk of a solid, 

 weather beaten, dead lodgepole pine (Pinus contorta), which was 

 infested with Buprestis aurulenta larvae. By Entomological 

 Ranger J. J. Sullivan February 4, 1914, at Placerville, Calif., 

 a larva from the outer wood of a dead digger pine (Pinus sa- 

 biniana) stump, which pupated on March 1 and transformed to 

 an adult female on March 20; April 3, 1915, at Placerville, a 

 pupa from the outer wood of a rotten sugar pine (Pinus lam- 

 beriiana) stump which was a live female in the rearing vial on 



