H. C. FALL. 51 



tiguous to it on each sutural interspace which is densely clothed with 

 white squamules ; beneath normally sparsely pubescent, the hairs fine 

 on the abdomen, coarser on the sterna. Head alutaceous, opaque, 

 finely sparsely punctate ; frontal fovea punctiform, eyes separated by 

 scarcely half of the width of the beak, the latter as long as the front 

 femora, coarsely striate almost throughout, the striae punctate ; an- 

 tennae inserted at the apical two-fifths (c?) or just beyond the middle 

 ( 9 ) ; second funicular joint not quite twice as long as wide, nearly as 

 long as the next two ; third about as long as wide. Prothorax dis- 

 tinctly transverse, sides arcuate and very little convergent in basal two- 

 thirds, thence more strongly convergent and sinuate to apex ; hind 

 angles a little obtuse ; punctuation close, moderately coarse, the inter- 

 vals alutaceous and dull. Elytra short, not more than one-fourth 

 longer than wide, three-fifths wider than the prothorax, sides nearly 

 straight in basal half, striae rather coarse, well impressed and 

 rather strongly punctate ; intervals convex, very minutely transversely 

 rugulose, feebly shining, the hairs excessively short and fine ; basal 

 margin with a transverse dentiform prominence at the base of the third 

 interspace. All the femora acutely toothed, the tooth of the anterior 

 femur larger as usual, acutely triangular and longer than wide ; tibiae 

 straight; ungual teeth moderate, approximate at tip. Length 1.7-2 

 mm. 



Type. — cf ; from Santa Rosa, Lower California (Beyer). 



This species v^ill fall near ebeninus in Dietz's table, but is 

 abundantly distinct from any other species known to me. 

 The peculiar basal dentiform prominences of the elytra are 

 characteristic and I think unique, at least so far as our fauna 

 is concerned. 



A. obesiilus n. sp. — Very robust, black, above rather thinly clothed 

 with elongate yellowish-gray scales which are more or less condensed 

 and whiter in a median and sublateral vittae on the prothorax, scu- 

 tellum densely clothed with white scales, also a short line of similar 

 scales on the fourth just behind the middle and at the base of the sixth 

 elytral interspaces ; beneath more densely albo-squamose, especially 

 at the sides of the sterna, the vestiture of the ventral segments sparser 

 and more hair like. Head numerously punctate, frontal fovea fine, 

 linear; eyes separated by slightly less than the width of the beak. 

 Beak rather slender, feebly curved, nearly half as long as the body, 

 finely punctate, the punctures more or less confluent longitudinally, 

 but without well defined striae ; lustre dull in basal half, more shining 

 apically. Antennae inserted near the middle of the beak, rufotestace- 

 ous basally, outer joints gradually darker, club dusky, slender, funicle 

 7-jointed, second joint nearly twice as long as wide and subequal to 



TRANS. AM. ENT. SOC. , XXXIX. 



