AMERICAN COLEOPTEKA. 219 



land to Lower California. It has not been found in California 

 proper nor — roughly speaking — anywhere to the north and west of 

 a line drawn from Southern California to Minnesota. It is proba- 

 ble that Boheman in describing the antennae of his Anobium pudi- 

 cum as having but two elongated terminal joints overlooked the 

 junction between the closely connected tenth and eleventh joints 

 and that LeConte was quite correct in referring this species to 

 Eupactus. A careful study of Boheman's description indicates that 

 his species is more nearly allied to amuenus and mixtus than to any 

 others in our fauna, but I cannot convince myself that it applies to 

 either of these. The locality named — "St. Francisco" — is more 

 than doubtful. 



The genus is probably well represented in Mexico and Central 

 America, from which region several species have been described in 

 the " Biologia " by Gorham, who created for them quite unnecessa- 

 rily the genus Thaptor. More recently others have been described 

 by Pic from Mexico, Colombia, Peru, Chili and Australia; whether 

 these are all strictly congeneric cannot possibly be determined from 

 the descriptions. Nine species are known to me from within our 

 faunal limits, separable as in the subjoined table: 



Elytra with two more or less deeply impressed marginal strife. 



Black, coarsely punctate, pubescence nearly imperceptible 1. nactus. 



Brown, finely punctulate, distinctly pubescent. 



More robust, discal striae obsolete 2. ad veil us. 



More elongate, discal strife traceable but faint 3. obsoletus. 



Elytra without marginal stria'. 



Pubescence distinct, punctuation dual. 



Finer punctures relatively few and inconspicuous; color dark brown, size 



smaller (3-3.7 mm) 4. aimriitis. 



Finer punctures numerous and conspicuous; color black, size larger (4.5 



mm.) 5. mi \ I us. 



Surface entirely glabrous, punctuation simple. 



Vertex carinate, last ventral segment with impressed marginal line. 



6. nitidns. 

 Vertex not carinate, last ventral without impressed marginal line. 



Metasternal process longer than wide; form moderately convex, punctua- 

 tion strong and rather close 7. eanonicus. 



Metasternal process wider than long. 



Form more elongate, moderately convex, punctuation conspicuous. 



8. similis. 

 Form stouter, very convex, punctuation exceedingly fine and remote. 



9. punetnlatns. 



TRANS. AM. ENT. SOC. XXXI. JULY, 1905. 



