1982] 
Adams & Garland — Genus Mallada 
245 
Remarks. This species occurs throughout the Western United 
States, but is commonest in the Southwest. The short mediuncus 
and spatulate process of the gonapsis readily distinguish the males 
from those of M. macleodi, and the females are identifiable by the 
broad-based erect vela. Some Arizona specimens have the vela 
nearly as elongate as that of macleodi, but never curved. 
Mallada sierra (Banks) new combination 
Chry sop a sierra Banks 1924:431. 
Description. This species is structurally and colorationally like 
M. perfectus, except for the following: pronotum with 2 black spots 
each surrounded by a patch of cinnamon brown (Fig. 14). Meso- 
prescutum with 2 black spots. Wings with black spot at base of 
costal area; forewing with black spot at intersection of 2A2 and 3A. 
Crossveins darker than in perfectus, and brown-bordering of veins 
less pronounced. Gonapsis (Fig. 13) with chisel-shaped reduced 
medial process and reduced bulb. Gonocristae less developed than 
in perfectus. 
Material Examined. Holotype 9, Calif., [Los Angeles Co.], San 
Gabriel Mts., Sister Elsie Peak, 10-vi [F. Grinnell] MCZ No. 14858. 
Additional: CALIF., Shasta Co., 10 mi. N. Redding, Mountaingate, 
1000 ft., 4-8. vi. 1981, 7 9, R. B. Miller (PAAC), 8 mi. N. Redding, 
800 ft., 30.v-6.vi. 1981, 4 3, 3 9, R. B. Miller (PAAC). ARIZ. Santa 
Rita Mts., 24.vii. 1927, R. H. Beamer (PAAC ex R. C. Smith). ORE. 
Jackson Co.: Green Springs, 27.viii.1962, J. S. Buckett, 1 9- 
WASH. Yakima Co.: Ft. Simcoe, l.viii.1962, J.F.G. Clarke, 1 9» 
(USNM). 
Remarks. This species is readily distinguished by the pronotal and 
mesonotal markings, and in the male by the simplified structure of 
the gonapsis. There has been some question as to whether sierra is a 
distinct species or merely a colorational variety of perfectus. In 
Shasta County, where these two species are sympatric, sierra 
appears early in the season, and perfectus somewhat later, pointing 
to the possibility of some seasonal isolation; in 1981, sierra was 
relatively common while perfectus was scarce (R. B. Miller, pers. 
comm.) thus providing some indication of the independence of popu- 
lation fluctuations in these two taxa. The interaction of these two 
