WASP GENTJS CERCERIS — SCULLEN 469 



patches on the forecoxae, basal end of the forefemora, apical tbu'd 

 of the hindfemora, patch on the apical end of the hindtibiae, and 

 much of the hindtarsi; wings subhyaline but very shghtly clouded 

 apically. 



Abdomen with a wide but emarginate and divided band on tergum 

 1, broad but deeply emarginate bands on all terga 2 to 5; venter 

 with more or less divided, cream-colored bands on sternites 2 to 5; 

 pygidium with side shghtly convex and ends subequal in width. 



The female of C. calochorti Rohwer is very similar in structure 

 to the female of C. varians Mickel but its color markings are very 

 much hghter. It is slightly smaller than the latter species. With 

 more collecting between the two distributional areas, C. varians 

 Mickel may in time be shown to be a subspecies of C. calochorti 

 Rohwer. 



Type. — The type female of C. calochorti Rohwer, from Boulder, 

 Colo., June 27, 1905, mariposa hly {Calochortus gunnisonii) (W. P. 

 Cockerell), is at the U.S. National Museum, no. 28481. 



Distribution. — This species has been taken along the eastern 

 slope of the Rocky Mountains, from Alberta south to New Mexico 

 and Texas. 



Prey record. — None. 



Plant record. — Achillea millefolium (Wyoming), Cleome serrulata 

 (Wyoming), Calochortus gunnisonii (Colorado), Kuhnistera (Peta- 

 lostemum) eliagophylla (North Dakota), Sisymbrium altissimum (North 

 Dakota), Tetradymia canescens (New Mexico), Veratrum sp. (Idaho). 



53a. Cerceris clypeata clypeata Dahlbom 



Figures 75, 156a,b,c 



Cerceris clypeata Dalilbom, 1845, pp. 221, 500. — Smith, F., 1856, p. 465. — Cresson, 

 1865, p. 114.— Packard, 1866, p. 61.— Cresson, 1872, 229.— Provancher, 

 1882, p. 75, n. 2; 1883, pp. 644, 645.— Cresson, 1887, p. 282.— Schletterer, 

 1887, p. 488.— Robertson, 1889, pp. 297-304.— Provancher, 1889, p. 644.— 

 Robertson, 1890, p. 200; 1891, pp. 570, 571, 573, 575; 1893, pp. 267-274; 

 1894a, pp. 455, 457, 460, 462; 1896a, p. 175; 1896b, p. 72.— Dalla Torre, 

 1897, p. 456.— Peckham, 1898, p. 109, pi. 1, fig. 8.— Bridwell, 1898, p. 209,— 

 Ashmead, 1899, p. 295.— Smith, J. B., 1900, p. 519.— Smith, H. S., 1908, 

 p. 368.— Smith, J. B., 1910, p. 678.— Banks, 1912a, p. 18; 1912b, p. 107.— 

 Viereck, 1916, pp. 695, 696.— Mickel, 1917b, p. 488.— Britton, 1920, p. 341.— 

 Rau, 1922, p. 21.— Bischoff, 1927, p. 369.— Johnson, 1927, p. 156.— Proctor, 

 1938, p. 439.— ScuUen, 1942, pp. 189-190.— Proctor, 1946b, p. 500.— ScuUen, 

 1949, p. 70; 1951, p. 1006.— Krombein, 1952a, p. 181; 1952b, p. 95; 1954, 

 pp. 6-7. — Krorabem and Evans, 1954, p. 235.— Evans, 1957, p. 86, pi. 12, 

 fig. 31.— Krombem, 1958a, p. 197.— ScuUen, 1960, p. 77. 



Cerceris imitator Cresson, 1865, p. 125. — Provancher, 1889, p. 450. — Ashmead, 

 1899, p. 295.— Smith, J. B., 1910, p. 678.— Viereck, 1916, pp. 695, 696. 



Cerceris deserta Packard, 1866, p. 63. 



