250 THE CANADIAN ENTOMOLOGIST 



153. Leptura impura LeConte. 



Taken rarely in the redwood belt of Sonoma County. 

 One specimen taken by Van Dyke in Siskiyou County. 

 Supposed by Blaisdell to breed in the sapwood of red- 

 wood. 



154. Leptura instabilis Hald. 



Taken in moderate numbers in parts of Northern 

 California and in Sierras. Rare in June on Pomona 

 foothills. Taken by Van Dyke on lupine at Tahoe; 

 by author at Donner Lake, July 3. 



155. Leptura sexmaculata Linne. 



Northern, barely running over into this State. Breeds 

 in spruce. 



156. Leptura harheri Fall. 



Taken in Humboldt and Shasta Counties. Breeds in 

 the Sitka spruce. Rather rare. 



157. Leptura vexatrix Mannerheim. 



Found on umbelliferous flowers, yarrow, etc., through 

 the Sierras from Siskiyou County south to Calaveras 

 County. This is considered by Van Dyke as a variety 

 of quadrillum Lee. 



158. Leptura sexspilota LeConte. 



Taken abundantly in Southern California by Van Dyke 

 in May and June. on flowers of greasewood; also taken 

 near Los Angeles on wild walnut. Taken at San Pedro 

 Martir, Lower California. 



159. Leptura matthewsii LeConte. 



Never found on flowers, but resting on leaves. Found 

 in the Coast belt from Marin County to the northern 

 line. Has been bred from the sapwood of the redwood. 

 June 27. 



160. Leptura grossa LeConte. 



Rare in the Sierras, on veratrin flowers. One taken by 

 Van Dyke on stump of Finns ponderosa in Yosemite 

 Valley. 



161. Leptura brevicornis LeConte. 



Found rarely in the north and in the Sierras. Breeds 

 in Pinus ponderosa. Taken by author at Donner 

 Lake. July 7. 



