A REVISION OF NORTH AMERICAN CHRYSOBOTHRINI 85 



Type locality. — Of semisculpta and contigua, California; types in 

 the Museum of Comparative Zoology. Of purpurifrons, "St. Fran- 

 cisco"; type in the Zoological Museum at Moscow. 



DISTRIBUTION 



From the material examined : 



California: Placerville, June 16, 1916; Fallen Leaf (F. B. Herbert). Im- 

 perial County, 1911 (J. C. Bridwell). Summerdale (H. E. Burke). Truckee, 

 August, 5,800 feet (H. F. Wickham). Lake Tahoe, July 10; Sisson (Hub- 

 bard and Schwarz). Yosemite, June 19, 1937, 3,800-4,000 feet; Stinson 

 Beach, May 1934 (E. G. Linsley). Panamint Mountains, Inyo County, 

 May 28, 1937 ; Idyllwild, June 26, 1936 ; Mt. Hamilton, June 2, 1933 ; Olympia, 

 June 6, 1933; Ben Lomont, June 11, 1933 (M. Cazier). Sequoia National 

 Park, November 26, 1935; Sonora, June 19, 1934 (D. De Leon). 



Idaho: Centerville, August 1905. 



Nevada: Lake Tahoe (Hubbard and Schwarz). 



Oregon: Hidaway, July 27, 1913 (W. D. Edmonston). Phoenix (J. M. Miller). 

 Grant County, July 9, 1914 (W. Robinson). 



Washington: Easton (A. Koebele). Cle Elum, July 4, 1932 (W. W. Baker). 



Chamberliu (1926) records the species from Arizona and Colorado, 

 but the Arizona records refer to cuprascens, and probably the Colorado 

 record should also be referred to that species. 



Hosts. — The adults have been reared from western yellow pine 

 (Pinus ponder osa Lawson) collected by Miller in Oregon, and from 

 sugar pine (Pinus lambertiana Douglas) collected by Burke in Cali- 

 fornia. Lange (1937) mentions it as occurring under the bark of the 

 main trunk and branches of Jeffrey pine (Pinus jeffreyi "Oreg. Com.") 

 in the Lassen National Forest in California; and Blaisdell (1892) 

 records it as having been reared from the half-dead limbs of apple 

 and live oak, but this record should probably be referred to mali. 

 Chamberlin (1926) gives the host as lodgepole pine (Pinus contort a 

 Loudon). 



The color and sculpture on the dorsal surface of the body are rather 

 uniform, but in a few specimens the pronotum is a little more cupreous 

 or bronzy and the smooth spots are indicated as in cuprascens. The 

 tooth on each side of the clypeal emargination is variable in length 

 and in some of the examples the sides of the pronotum are nearly 

 parallel and strongly sinuate at the middle. Care should be exer- 

 cised in using as a diagnostic character the tooth on the anterior tibia 

 of the male in this species. In some specimens it is acute at the apex 

 as in cuprascens, whereas in others it is more elongate, and broadly 

 rounded at the apex, this difference being found in specimens reared 

 from the same piece of wood. The length is from 7.5 to 12 mm. 



LeConte described contigua from a single male and semisculpta 

 from a single female, both collected by Andrew Murray in California, 

 but since semisculpta is the female of contigua, the former name should 

 be used for this species, as it has page priority over contigua. The 

 writer has been unable to examine the type of purpurifrons, but since 

 the species in this group resemble one another so closely it is impos- 

 sible to be sure of the identification of purpurifrons, and as semi- 

 sculpta and purpurifrons were both described in the same year, it is 

 uncertain which name has priority, so semisculpta, the type of which 

 has been examined, is used for this species. 



