40 NaturauL History BULLETIN. 
pubescent lateral fovee. lytra together as wide as long, 
width at the shoulders greater than that of the prothorax; 
disk not very convex, trifoveate at the base, sutural and discal 
lines parallel, the latter abbreviated just before the middle. 
Abdomen shorter than the elytra, base with two short carine, 
segments subequal, the basal one longest. The abdomen in 
the ¢ is more rounded at the apex. 
Habitat. Middle California. 
There are four more species of this genus, one, caléfornicum 
Lec. being insufficiently described. The three other species 
are described from unique specimens and may perhaps suffer 
a reduction in number at some future time. Taking A. pall- 
dum, which is before me, as the type, they differ very little as 
follows: 
A. potituM, Casey. Probably a 9; abdomen longer, more 
pointed behind, and darker. Eyes small, tempora longer than 
the eye; antennz with the tenth joint twice as wide as long; 
eleventh twice the width of the tenth, cylindrico-conical, as 
long as the five preceding. Prothorax as wide as long, feebly 
sinuate toward the base, the latter two-thirds as wide as the 
disk and one-half wider than the neck; elytral discal line 
reaching a little beyond the middle; abdominal carine one- 
third as long as the segment and one-fourth of the segmental 
width apart. Length 1.3 mm. 
A CALIFoRNIcUM, Lec., may be identical with A. politum, 
but the elytra are said to be sparsely punctulate. 
A. ROBUSTULUM, Casey. & tempora longer than the eye; 
tenth antennal joint twice as wide as long, eleventh elongate, 
acuminate, as long as the four preceding joints together. 
Prothorax sinuate at the base, wider than long; base four- 
fifths of the pronotal width and one-half wider than the neck; 
disk laterally depressed, anterior to the lateral foveze; there is 
a trace of a median impressed line near the center; elytral dis- 
cal line reaching beyond the middle; abdominal carine one- 
