AMERICAN COLEOPTERA. 331 



Presternum very sparsely punctate, side pieces nearly smooth. Abdomen 

 with first segment sparsely punctate, segments two to five more coarsely 

 and densely punctured. Pygidium moderately punctate. Length ,10 inch ; 

 2.5 mm. 



The elytra are normally colored as described above, that is, there is 

 an oblique rufous spot on each elytron behind the base and another at 

 apical third. These spots gradually spread so that the entire disc is 

 rufous, and only the side margin and tip piceous. The latter form is 

 that described by Mannerheim. 



Specimens have been sent from Oregon, (Ulke), Michigan, (Schwarz, 

 1599), Canada and Alaska, (Mann.). 



The following species is unknown to me. The name is already pre- 

 occupied and it would be as well to drop it entirely from the lists. 



Rh. puncticollis || Boh. Res. Eugen. 1858, p. 39. — Elongatus, subdepressus, 

 rufo-ferrugineus, nitidus; prothorace oblongo, sat crebre, evidenter punctu- 

 lato, lateribus rectis, antice posteceque angustatis ; elytris sat crebre punctato- 

 striatis, interstitus Isevibus. Long. 2.75 — 3; lat. .75 mm. 

 Patria; California, San Francisco. 



The detailed description adds nothing of moment to the above 

 short diagnosis. It may not be a Rhizophagus and all of Boheman's 

 localities are uncertain, and as the name is preoccupied it would be 

 better to drop it entirely. 



In a short paper in the Verhandlungen des naturforschenden Vereins 

 in BriiJin, vol. xi, 1872, Mr. Reitter describes as Rhizophagus : 



R. corpulentus (Motsch.), Reitter ;= Hesperobaenus abbreviatus 

 Motsch. 



R. striolatus Reitter = Bactridium striolatum. 



R. nanus Erichs. = Bactridium ephippigerum Guer. 



Bibliography and Synonymy. 

 BRACHYPTERINI. 



BRACHYPTERUS Kugelann. 

 Schneid. Magaz. p. 560. 

 B. urticae Fab. Ent. Syst. i, p. 235; Erichs. Nat. Ins. iii, p. 132; Murray, Monogr. 

 Trans. Linn. Soc. xxiv, 3, p. 242. 

 pusillus Mels. {Ce7-cus), Proc. Acad. 1844, p. 105. 

 B, troglodytes Murr. loc. cit. p. 244. 



B. globularius Murr. loc. cit. p. 245. 



CERCUS Latreille. 

 Prec. car. gener. des Ins. p. 68, 



C. abdominalis Erichs. Germ. Zeits. 1843, iv, p, 229; Murray, Mon. p, 236. 

 C. pennatus Murr. Mon. p. 235, 9> 



crinitus Murr. Mon. p, 237, % . 



