398 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iie 



Prey record. — Algarohius prospis (LeConte), Mimosestes amicus 

 (Horn), Mimosestes protractus (Horn), Neltumius arisonensis (Schaef- 

 fer), all from Tucson, Ariz., in 1957-1958, by F. Werner (1960, pp. 

 43-44), taken on Mexican palo verde (JParkinsonia) . 



Plant record. — Casually about oleander (Arizona). 



24a. Cerceris vanduzeei vanduzeei Banks 



Figures 29, 127a,b,c 



Cerceris vanduzeei Banks, 1917, p. 114; 1947, p. 32. — ScuUen, 1951, p. 1010; 



1960, p. 80. 

 Cerceris cojnplanata Mickel, 1917a, p. 340. — Banks, 1947, p. 31. — Scullen, 1951, 



p. 1006. 



Female. — Length 8 to 9 mm. Black with yellow markings; 

 closely and deeply pitted; clothed with very short silvery hairs. 



Head slightly wider than the thorax; black except for large frontal 

 eye patches, most of the central lobe and side lobes of clypeus, spot 

 back of compound eyes, basal half of mandibles, and patch on the 

 scape, all of which are yellow; clypeal border showing five distinct 

 denticle-like extensions; clypeal surface with a medially located low, 

 blunt elevation, below which is a pair of erect black denticles; mandi- 

 bles with two denticles, the more apical one somewhat the larger; 

 antennae normal in form, scape with a yellow patch, peduncle amber, 

 flagellum hght amber below, dark above. 



Thorax black except for two elongate patches on the pronotum, 

 two spots on the scutellum, the metanotum, variable patch (which 

 may be divided) on the propodeum, patches on the pleuron, and the 

 tegulae, all of which are yellow; tegulae smooth and not elevated; 

 enclosure heavily ridged at 45° angle to central groove; mesosternal 

 tubercle small; legs black basally to near apical ends of femora, 

 beyond which they are largely yellow except for patches of amber on 

 the tibiae, tarsi becoming darker; forefemora with a pronounced 

 depressed area on the posterior side; wings subhyahne except for the 

 stigma, which is amber. 



Abdomen black with yellow emarginate bands on terga 1 to 5; 

 bands on terga 2 to 5 broadly and deeply emarginate, band on tergum 

 2 broader than others; venter dark amber, immaculate or showing 

 very small yellow spots laterally on some sternites; pygidium suboval 

 with both ends rounded. 



Male. — Indistinguishable. Probably it is being confused with 

 closely related species. 



The entire face of the female may be black except for the frontal 

 eye patches. Mandibular denticles may be worn off so that the 

 mandibles appear smooth. The clypeal elevation and surface denticles 



