94 
Psyche 
[Sept. 
California Academy series of pedalis from Lower Cali- 
fornia, the type locality, shows that there is a constant 
difference between the Lower California and Arizona 
specimens. From pedalis , tenebrosa can be distinguished 
in either sex by the lack of a pale sutural margin on the 
elytra and by its smaller size. The males have much more 
slender antennae and have the tip of the aedeagus of a 
different shape. (Fig. 1.) 
A 
Fig. 1. A. Antenna of Epicauta pedalis Lee., male. B. Antenna of 
Epicauta tenebrosa sp. n., male. C. Tip of aedeagus of Epicauta pedalis, 
male. D. Tip of aedeagus of Epicauta tenebrosa } male. 
Length : 8 to 10 mm. Black, moderately densely clothed 
with decumbent pubescence, which is tan on the elytra, 
paler on the head and pronotum and cinereous on the 
underside. Legs pale brown. Head subquadrate, with 
moderately dense and deep punctures, distinctly microre- 
ticulate on the intervals. Suture very distinctly im- 
pressed. Antennal calluses small, denuded, shiny. Eyes 
prominent, transverse, slightly wider than in pedalis. 
Antennae in both sexes quite slender, tapering, reaching 
almost to the middle of the elytra, two and four-fifths 
times as long as an anterior tibia. First segment slightly 
thickened, reaching halfway across the eye ; second short, 
three-sevenths as long as the first; third slightly longer 
than first ; fourth four-fifths as long as third ; succeeding 
segments decreasing slightly in length and width. The 
