16 
THE PAN-PACIFIC ENTOMOLOGIST 
Fig. 1. Lateral view right metatibia of male. Fig. 2. Ventral view male 
genitalia. Fig. 3. Left lateral view male genitalia. 
Berkeley). 1 male, 1 female, Grand Island, 23 March 1966, M. S. Wasbauer (Calif. Dept, of 
Agriculture). 
If the reticulation on the head and thorax is visible, sacramento keys 
to couplet 11 in Werner’s (1964) key to North American Anthicus. If the 
reticulation is not visible, sacramento will key to couplet 23. At 
couplet 11 the species can be separated from maritimus LeConte by 
the prominent elytral humeri and elongate antennal segments, and 
from custodiae Werner by the fainter microreticulation and denser 
setation. It can be separated at couplet 23 by the rounded basal 
angles of the head and the size being greater than 3.00. 
A. sacramento apparently is restricted to the sand dune areas near 
the mouth of the Sacramento River. This is important as these small 
areas are often used for recreation by offroad vehicles and as a 
source of material for the sand and gravel industry. This species 
conceivably would become extinct if its restricted habitats were 
removed or altered. 
