24 AMERICAN COLEOPTERA. 



of tlie basal impressions. It is worthy of note that the number of 

 setigerous punctures along the inner margin of the femora is the 

 same in the two species. 



The males have the middle tibise normally dentate. 



It is rare in collections. The seven specimens known to me are 

 all from California. Of these, the type is from Sacramento and one 

 of the others from San Diego. 



6. A. bowditchi n. sp.— Elongate, feebly convex, the elytra slightly flat- 

 tened on the disk. Color black, shining, the females more or less alutaceous. 

 Head slightly narrower than the thorax at apex ; frontal grooves short, deep, 

 anteriorly not extending on to the epistoma; antennae shorter than the bead 

 and thorax, slender, dark rufous; palpi dark rufous. Prothorax subcordate, 

 about one-half wider than long, slightly narrower at base than apex, more or less 

 coarsely punctate at apex, more densely so at base; apex feebly emarginate ; 

 transverse impressions feeble or nearly obsolete; median line distinct, abbrevi- 

 ated in front; basal impressions broad, deep, distinctly bifoveate, the inner fovea 

 coarsely, often densely, punctate, the outer usually impunctate or less densely 

 punctured than the inner; sides with the margin narrowly reflexed, arcuate, 

 sinuate behind; base truncate; hind angles rectangular and acutely carinate. 

 Elytra striate, together slightly wider than the thorax and rather more than one- 

 half longer than wide; striaj entire, distinctly punctate to behind the middle, 

 the outer somewhat less deep and more finely punctured, scutellar stria moder- 

 ately long, eighth with the row of ocellate punctures broadly interrupted at 

 middle ; intervals flat or nearly so. Body beneath dark piceous or nearly black, 

 shining, impunctate. Legs dark piceous or nearly black ; middle and posterior 

 femora with two setigerous punctures along the inner margin ; tarsi not grooved 

 on the outer side. Length .48-. .5.') inch ; 12-13.75 mm. 



In the males the middle tibise are normally dentate on the inner 

 side, the upper tooth being slightly longer than the lower and situ- 

 ated about the middle, the lower about midway between it and the 

 apex. 



A very well marked and easily recognizable species. It is subject 

 to some variation in the punctuation of the thorax. Some speci- 

 mens have the apex with a few coarse punctures, while the outer 

 basal impression is impunctate. In the other extreme the thorax is 

 coarsely and moderately densely punctured at apex, although less 

 densely so than at base, while the outer fovea of the basal impres- 

 sions is only slightly more sparsely punctate than the inner. The 

 two forms are connected by numerous intergrades. 



I take pleasure in assigning the above name as a token of regard 

 and gratitude, and in memory of the many pleasant hours I have 

 passed in the c()iiii)any of my friend Mv. Frederic C. Bowditch. 



