WASP GENUS CERCERIS — SCULLEN 455 



of femora, beyond which there are variable amounts of Ught yellow 

 and amber. 



Abdomen with two small patches on tergiim 1, a broken emarginate 

 line on tergum 2, emarginate narrow bands on terga 3 and 4, and 

 small evanescent lateral patches on tergmn 5; venter immaculate. 



Male. — Unknown. 



Types. — The type female of C. aegualis idahoensis Scullen, from 

 Craig's Mt., Idaho (Wm. J. Fox), is at the Philadelphia Academy 

 of Natural Sciences, no. 5040. Para types are as follows: 



British Columbia: 9, Chilcotin, June 15, 1929 (G. J. Spencer); 9, Creston, 

 2816 ft., 1924 (C. S. Lallamand). Colorado: 9 , 5 mi. N. Cedaredge, July 11, 

 1938 (U. Lanham); 9, Lake City, June 29, 1937 (R. H. Beamer). Idaho: ?, 

 Craig's Mt. (Wm. J. Fox) ; 9 , Chilco, Kootenai Co., July 2, 1952 Achillea sp., 

 (W. F. Barr). Oregon: 9 , Lick Creek Ranger Station, Wallowa National Forest, 

 4600 ft., Aug. 16, 1937 (Bolinger and Jewett) ; 9 , Ochoco Pass, Ochoco National 

 Forest, 5000 ft., July 10, 1955 (J. F. G. Clarke). Washington: 9, Ritzville, 

 June 16, 1920 (R. C. Shannon). Wyoming: 29 9, Jackson, 6300 ft., July 13, 

 1920; 2 9 9, Jenny Lake, Grand Teton National Park, June 1941 (G. E. Bohart). 



Distribution. — Largely in the northern Rocky Mountains area, 

 Idaho, and bordering states. 

 Prey record. — None. 

 Plant record. — Achillea sp. (Oregon). 



45. Cerceris alceste Mickel 



Figures 66, 148a,b,c 

 Cerceris alceste Mickel, 1917a, p. 333; 1917b, p. 449.— Scullen, 1951, p. 1005. 



Female. — ^Length 18 mm. Black with yellowish-white markings 

 and variable shades of reddish brovvn. 



Head black except face and sports back of the compound eyes, 

 which are yellowish white, the vertex and genae, which are ferruginous; 

 clypeal border with a medial extension on the sides, on which are 

 two slightly rounded denticles opposite the points of the clypeal 

 process; clypeal process somewhat lunar in shape with a lateral 

 secondary projection on each side; mandibles with three low denticles, 

 the medial one being much more acute than the other two, which 

 are low and broad; antennae ferruginous at the base, becoming 

 fulvous apically. 



Thorax largely black except divided band on pronotum, scutellum, 

 metanotum, large patches on the propodium, spot on the pleuron, 

 and the tegulae, aU of which are yellowish white; most of the light 

 markings show a ferruginous border; enclosure with fine longitudinal 

 lines tending to radiate to the side; legs ferruginous; wings subhyaline, 

 becoming darker at the apex. 



