192 MEMOIRS ON THE COLEOPTERA 



moderately rounded from base to apex, the latter sinuato-truncate, 

 with rounded angles and 'three-fourths as wide as the base, which is 

 transverse and coarsely beaded, with the angles slightly obtuse but 

 with their apices only very finely blunt; surface somewhat coarsely 

 reflexed and punctulate at the sides, almost evenly so throughout the 

 length, the fovese large, shallow, very coarsely punctate toward their 

 centres, the remainder of the surface smooth and not punctate, the 

 stria fine but rather strong; elytra oval, very gradually ogival behind, 

 with parallel arcuate sides, a little more rounding at base, nearly 

 one-half longer than wide, the sinus veiy oblique, obsolete; striee 

 coarse, deep and abrupt, the scutellar long, the intervals flat, the 

 surface otherwise as in cosnus; hind tarsi rather more slender, the 

 first joint longer than the fifth. Length (9) 8.8-9.0 mm.; width 

 3.3-3.6 mm. District of Columbia to Texas (Austin). Appa.ently 

 not at all abundant laetus Dej. 



The species described by LeConte under the name similis (Ann. 

 Lye., V, p. 183) I cannot identify. The description is as follows: 



A. similis Lee. Oblong, "minus convexus" [the species immediately 

 preceding in the rather depressed consobrinus], black, the head slightly 

 punctulate; prothorax punctulate, one-half wider than long, not narrowed 

 posteriorly, the finely depressed margins evanescent, behind the middle; 

 hind angles right, the base slightly impressed, densely punctulate; elytra 

 finely striate, the intervals almost flat, the third impunctate [!]; first 

 joint of the antennae rufo-piceous, with a fuscous macula. Length 11.5 

 mm. Oregon. 



If the prothorax is really not at all narrowed posteriorly, and the 

 statement that the hind angles are right tends to confirm the 

 language of the description in that respeci, it would cause similis 

 to depart distinctly from any other species known to me. G. H. 

 Horn states that both similis Lee., and puncticollis Chd., are 

 synonyms of semipunctatus Lee., though the latter is of a much 

 more recent date than similis. As to puncticollis Chd., described 

 as coming from Vancouver Island, the author states that the pro- 

 thorax in the male type is punctured throughout, showing that it 

 belongs to the semipunctatus section, that the hind angles of the 

 prothorax are " parfaitement droits" and that the elytra are not 

 at all punctulate. As the alternately punctulate intervals are a 

 very obvious feature in the male of semipunctatus, there is reason 

 to believe that puncticollis cannot be that species, and it is my belief 

 that it is a synonym of similis Lee. There is also reason to believe 

 that similis is a valid species, with virtually parallel sides of the 

 prothorax, and not very closely related to semipunctatus. I think 



