32 PROCEEDINGS OF THE NATIONAl, MUSEUM vol. loi 



Pedro, Winterhaven (on Melilotus indica) ; Colorado: Grand Junc- 

 tion; Idaho: Blackfoot (on sugar beets) ; Baja California : Calexico. 

 Remarks. — This slender, elongate species with long, coarse scales is 

 not easily confused with any other. Apparently it has an unusually 

 long range, occurring from Arizona to Idaho, and west to California 

 and Lower California. E. A. McGregor ^^ reports that beetles have 

 done severe injury to cotton in Yuma, Ariz.; 500 acres had to be re- 

 planted twice following complete destruction of seedling plants, and 

 finally planting was abandoned. Adults were seen feeding on the 

 subterranean stems of arrow weed {Pluchea sericea) , trailing mallow, 

 and BacchaHs sp., this being the first time the field was sown to crops. 

 Previously almost a pure stand of arrowweed had been there. 



MYOCHROUS WHITEI, new species 



Plate 3, Figure 4 



From 3.5 to 5 mm. in length, elongated oblong, black, shining with 

 a bronzy luster under the dense, broad, pale brown and white scales, 

 scales easily rubbed off; prothorax as long as wide, inconspicuously 

 3 -toothed, elytra with rows of rather small punctures, not very closely 

 placed and finer toward apex. 



Head rounded over the occiput, with a depressed median line half- 

 way down the front, occipital ridgings not present, punctures beneath 

 the scales, which cover the head down to antennal sockets, fine and 

 dense and in lines on the occiput; lower front shining, with fewer 

 and finer scales and sparse punctation. Antennae extending below 

 the humeri, reddish brown with darker and thicker distal joints, of 

 the usual proportions. Prothorax fully as long as wide, rather in- 

 conspicuously 3-toothed, with a small tooth at apical and basal angles ; 

 evenly convex, without humps or depressions ; surface densely, finely, 

 and not confluently punctate, the punctures somewhat elongate with 

 a tendency toward arrangement in lines and thickest in the middle, 

 entirely covered by the closely appressed, wide, brown-and-white 

 scales. Elytra with small humeri and short intrahumeral sulcus; no 

 distinct basal callosities ; punctures not very coarse and becoming finer 

 and sparser in apical half ; scales dense, flatly appressed and wide, usu- 

 ally j)ale but frequently presenting a pale brownish vittation, with the 

 apex usually brown. Body beneath black, shining with a metallic 

 luster; legs and abdomen less densely covered b}' finer pale scales, 

 abdomen finely punctate; a small depression at tip of abdomen in 

 the male, less marked in the female. Hind femora not toothed, 

 anterior tibiae very indistinctly toothed. Length 3.6 to 5.1 mm.; 

 width 1.6 to 2.3 mm. 



Type and paratypes. — Type male and 12 paratypes, collected March 

 19, 1931, by E. P. Van Duzee, California Academy of Sciences; 2 

 paratypes, U.S.N.M. No. 59022. 



" Journ. Econ. Ent., vol. 10, p. 504, 1917. 



