40 Natural History Bulletin. 



pubescent lateral foveas. Elytra 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. 

 Abdotnen shorter than the elytra, base with two short carinas, 

 segments subequal, the basal one longest. The abdomen in 

 the 3 is more rounded at the apex. 

 Habitat. Middle Cahfornia. 



There are four more species of this genus, one, californicum 

 Lee. 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. -palli- 

 dimi^ which is before me, as the type, they differ very little as 

 follows: 



A. politum, Casey. Probably a $; abdomen longer, more 

 pointed behind, and darker. Eyes small, tempora longer than 

 the eye; antennae with the tenth joint twice as wide as long; 

 eleventh twice the width of the tenth, cyhndrico-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 carin^e one- 

 third as long as the segment and one-fourth of the segmental 

 width apart. Length 1.3 mm. 



A CALIFORNICUM, Lee.., may be identical with A. polituin, 

 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 fove«; there is 

 a trace of a median irripressed line near the center; elytral dis- 

 cal line i-eaching beyond the middle; abdominal carin£e one- 



