28 U.S. NATIONAL MUSEUM BULLETIN 2 68 



Parker); 4 9 ?, 9 cf c?, 6 mi. NE. Sparks, Washoe County, Sept. 1, 1960, at 

 Chrysothamnus nauseosus (R. W. Lauderdale); 9,3 cT cT, same locality, Aug. 13, 

 1965, 4,500 ft. elev., Chrysothamnus sp. (H. A. Scullen); 9, Sutcliff, Washoe 

 County, Sept. 8, 1959 (F. D. Parker); 9, Wadsworth, Sept. 11, 1923 (Carl D. 

 Duncan). 



Peey record. — None. 



Plant record. — Chrysothamnus nauseosus; Dalea polydenia; Meli- 

 lutus alba; Tetradymia canescens (all in Nevada). 



lib. Eucerceris elegans monoensiSf new subspecies 



Figures 14, 69 a, b, c, d, e, f 



Female. — Length 12 mm. Head ferruginous with limited black 

 marks, abdomen black and yeUow; punctation small and sparse; 

 surface shiny; pubescence very short and inconspicuous. 



Head slightly wider than the thorax; ferruginous except small 

 patches bordering the eyes near the vertex, the interocellar area, 

 antennal scrobes, apices of the mandibles, mandibular denticles, 

 clypeal denticles and the apical part of the antennae, all of which 

 are dark fuscous to black; clypeal border with a broad extension on 

 the medial lobe slightly emarginate, a pair of denticles at the junction 

 of the lobes of the clypeus, the lateral one low and rounded, a row 

 of scattered bristles above the medial extension on the medial lobe 

 of the clypeus; mandibles with a single bicuspidate denticle; antennae 

 normal in form. 



Thorax black except the pronotum, most of the scuteUum, the 

 metanotum, two oval patches on the enclosure, large oval patches 

 on the propodeum, an iiTCgular area on the pleuron and a spot on 

 on the tegulae, all of which are yellow; the pronotum has a slight 

 elevation on the dorso-lateral area; enclosure with a medial groove, 

 ridged at 45° to the meson; mesosternal tubercles small; legs all 

 ferruginous; wings subhyaline with the anterior part clouded with 

 fulvous. 



Abdomen black except for broad bands on terga 1 to 5, sterna 

 3 and 4, and large lateral patches on sternum 2, ail of which are 

 yellow; pygidium with sides converging to a narrow rounded apex. 



Male. — Length 12 mm. Black with yellow and ferruginous mark- 

 ings; punctation average; pubescence very short and iaconspicuous. 



Head subequal in width to the thorax; black except for most of 

 the face, irregular spots back of the eyes, base of mandibles and 

 small patch on the scape, aU of which are yellow, and the genal area 

 which is ferrugkious; small black areas appear above the antennal 

 scrobes; three low denticles on the medial clypeal margin, close above 

 and between the denticles are two clusters of short bristles; man- 

 dibles without denticles; antennae normal in form. 



