162 LE CONTE.— LONGICORN COLEOPTERA 



The males of all the species I have seen have the internal claw of the anterior 

 tarsi armed with a sharp tooth. I have not had an opportunity of examining the 

 males of S. ohliqua, and concolor. I have some doubt whether this peculiar character 

 will be found in them, as they recede in several characters from the other species of 

 the genus. The genera Anarea and Compsidea (Muls.) so far as they relate to 

 American species (Hald. 55) seem to be founded on rather indistinct characters. I 

 have therefore replaced in the original genus, all those referred by Haldeman to 

 these genera. The length of the first joint of the posterior tarsi varies in such a 

 manner, that I have not been able to make use of it, even for sectional characters. 



§1. Elytris apice acutis divaricatis. 



1. S. OBLiQUA, picea, sordide putescens, capite thoraceque vittis 4 obscuris, elytris parce punctatis, fasciis 



4 obscurioribus paulo impressis, spina apicali armatis, antennis cinereis articulis 1™° 2°''°, 3 ''que apice 



nigris. Long. -75. 

 Say. J. A. N, S. 5, 274. 

 Anserea ohliqua Hald. 55. 



Pennsylvania, very rare : Mr. Ziegler. 



§2, Elytris apice rotundatis, sutura spina armata. 



2. S. CALCAKATA, plumbeo-pubescens, nigro-punctata, capite fulvo-variegato, thorace pube fulva trivittato, 



elytris maculis irregularibus lateribusque fulvis. Long. -90 — 1*10. 

 Say. J. A. N. S. 3,408. Harris Ins. Mass. 88. 

 Ancvrea calcarata Hald. 55. 



Middle and Eastern States : more abundant in Massachusetts ; the larva, according 

 to Dr. Harris, lives in poplar trees ; the male has the elytra a little divaricate at tip. 



3. S. ADSPERSA, ochraceo-pubescens, nigro-punctata, thorace latitudine sesqui breviore, utrinque minus dense 



pubescente. Long. -90. 

 Leo. Agassiz Lake Superior, 234. 



One specimen, from the copper mines of Lake Huron. Very similar to the 

 preceding, but the piibescence is uniform in color, the thorax is shorter, and more 

 thickly punctured. 



§3. Elytris apice rotundatis, sutura non spinosa. 



4. S. MUTICA, nigra, punctata, cinereo-pubescens, capite thoraceque vittis tribus latis fulvo-pubescentibus, 



elytris maculis pluribus parvis fulvo-pubescentibus, antennis nigris cinereo-annulatis. Long. -6. 

 Say. J. A.N. S.3,409. 

 Anserea mutica Hald. 55. 



Western part of New York. My specimen has the elytra a little divaricate, and 

 subacute at the apex. The elytra are more convex than in the two preceding species. 

 As in them, the first joint of the posterior tarsi is scarcely longer than the others. 

 This is probably the American S. populnea referred to by Fabricius and Olivier ; 

 Say's specimen was from Missouri Territory. 



