REVISION OF GENUS EUCERCERIS CRESSON 29 



Thorax black except the pronotiim, inverted C-shaped patches 

 on the mesoscutimi, two large fused patches on the pleuron, a wide 

 band on the scutelliim, the metanotum, large patches on the pro- 

 podeum and the tegulae, all of which are yellow; tegulae low and 

 smooth; enclosure with a medial groove and ridged at about 45° 

 to the meson; mesosternal tubercles absent; legs ferruginous except 

 for limited elongate patches of yellow on the first and second pair 

 of tibiae and femora; wings subhyaline but clouded along the anterior 

 half with a darker area apically. 



Abdomen black except for broad bands on terga 1 to 6, sternum 3, 

 and variable lateral patches on sterna 2, 4, and 5; prominent rows 

 of bristles on sterna 3 and 4, a small cluster of short bristles on ster- 

 num 5; pygidium as illustrated (fig. 69f). 



r~. 



Figure 14. Western U.S. E. elegans monoensis, new subspecies 



Yellow oval patches on the enclosure are quite variable in size 

 and may disappear from some specimens. The yellow patches on 

 the propodeum also vary and may be divided into anterior and pos- 

 terior parts. The yellow marks back of the eyes may be reduced or 

 completely disappear. 



Types. — The holotype 9 and allotype cf are from Grant Lake, 

 Mono County, Calif., Aug. 5, 1948 (P. D. Hurd and J. W. MacSwain). 

 Deposited at the California Academy of Sciences. 



Paratypes. — California: 9? 9 94cf c?, Grant Lake, Mono County, Aug. 5, 

 1948 (P. D. Hurd and J. W. MacSwain) ; 2 ? ? , 6 d" cf , same locality, Aug. 3, 

 1950, Aug. 28, 1959 (J. W. MacSwain); cf. Lone Pine, Inyo County, June 6, 

 1937 (N. W. Frazier); 5cf cf. Mono Lake, Mono County, Aug. 2, 1947 (U. N. 

 Lanham) ; ? , 4 mi. S. junction Hwy. 120 and 395, Mono County, Aug. 7, 1958 

 (A. D. Telford). 



Distribution. — Mono County, Calif, and adjoining areas. 



Prey record. — None. 



Plant record. — Chrysothamnus (California). 



