A STUDY OF THE GENUS MONOXIA — ^BLAKE 159 



not occur in Arizona and New Mexico. It has been collected fre- 

 quently on Chenopodium album and sugar beet {Beta vulgaris), and in 

 Colorado and Montana the beetles have been reported as damaging 

 sugar beets. 



Distribution. — British Columbia (Creston, Merritt, Rykerts, Trinity 

 Valley, Vernon) ; Washington (Elk, Medical Lake, Pullman, Ritzville, 

 Spokane Falls, Yakima); Oregon (Corvallis, Forest Grove, Hunting- 

 ton); California (Amadee, Grant Forest, Tulare County; Isabella, 

 King City, Los Angeles; Meadows Valley, Plumas County; Mill 

 Creek Canyon, San Bernardino County; North Hollywood, 

 Pomona, Sacramento, San Joaquin Mill, San Jos6, Shasta County, 

 Sprekels) ; Idaho (Blackfoot, Bliss, Bonners Ferry, Cabinet, Cascade, 

 Challis, Clarks Fork, Clayton, Council, Driggs, Emmett, Head- 

 quarters, Heron, Kura, Lowman, Nampa, Parma, Porthill, Rexburg, 

 Shoshone, Solomon, Twin Falls); Montana (Armstead, Bozeman, 

 Grantsdale, Carlos Mountains, Florence, Hamilton, Musselshell 

 County, Paradise, Plains, Whitehall); Wyoming (Corbett, Jackson, 

 Lake McElroy, Paha); Colorado (Alamosa, Antonito, Colorado 

 Springs, Delta, Fowler, Glen Springs, Gunnison, Gypsum, Hotchkiss, 

 Manitou Park, Paonia); Nevada (Carson City, Lovelock); Utah 

 (Beaver Valley, Bountiful, Coalville, Joseph, Lehi, Ogden, Salt Lake) ; 

 North Dakota (Williston); "Kentucky"; "S. 111." (these last two 

 probably not correctly labeled). 



MONOXIA DEBIUS LeConte 



Plate 18, Figures 7, 8 



Monoxia obtusa LeConte, Proc. Acad. Nat. Sci. Philadelphia, vol. 17, p. 222, 1865. 

 Monoxia debilis LeConte, Proc. Acad. Nat. Sci. Philadelphia, vol. 17, p. 222, 

 1865. — Horn, Trans. Amer. Ent. Soc, vol. 20, pp. 85, 86, 1893. 



In LeConte's paper both obtusa and debilis are described on the 

 same page, the description of obtusa preceding that of debilis. Horn 

 when uniting them selected the name debilis, and his choice is valid 

 under Article 28 of the International Rules of Zoological Nomen- 

 clature. 



LeConte's Latin description of debilis may be translated thus: 

 Pale testaceous, densely covered with pale pubescence, the prothorax 

 less than twice as broad as long, with rounded sides, the posterior 

 angles with a minute tooth, the disk densely punctate, canaliculate, 

 and on each side depressed here and there in places ; elytra wider than 

 the prothorax, deeply punctate, the punctures stronger anteriorly; 

 transversely convex and each elytron ornamented with small black 

 spots in a fourfold series; antennae fuscous on the outside. Length 

 0.15 to 0.18 inch. The type locality is given as "N. M. Mr. Ulke." 

 The pubescence is dense and somewhat silvery; the black dots of the 



