1852.] 99 



One specimen, St. Isabel, California. The head has an obsolete smooth 

 frontal line ; the apex of the elytra is fuscous. 



16. A. difficilis, elongatus, testaceus, albido-pubescens, capite postice 

 rotundato, disperse punctate, medio la-vi, thorace subcampanulato, latitudine 

 non longiore, confertim punctato, elytris grosse dense punctatis, fascia lata ad 

 medium infuscata. Long. '12. 



Lee. Agass. Lake Superior, 230. 



Lake Superior, abundant. The frontal smooth line is broad ; varies with the 

 elytral band obsolete. 



17. A. CO nf us us, elongatus, testaceus, albido pubescens, capite grosse 

 punctato, postice rotundato, medio laevi, thorace vix campanulato, lateribus 

 postice oblique angustato, dense punctato, elytris grosse punctatis, fascia 

 obscura ad medium ornatis. Long, -IQ. 



New York; Louisiana, Mr. Wapler ; Southern Illinois, Haldeman. This species 

 is extremely similar to the preceding, but the head is more coarsely punctured ; 

 the sides of the thorax behind the middle are oblique, not parallel. 



18. A. luteolus, elongatus, flavo-testaceus, albido pubescens, capite postice 

 rotundato, thoraceque confertim punctatis, hoc ovato, postice angustato, 

 latitudine vix longiore, elytris confertim sat grosse punctatis. Long. '12. 



Lee. An. Lye. 5, 151. 

 - Vallecitas, California. This species resembles the last very much, but the 

 thorax is not at all campanulate, the punctures on the head are denser, and the 

 only smooth part is on the vertex. A variety has a broad fuscous fascia at the 

 middle of the elytra. 



19. A. scabriceps, elongatus, nigro-piceus, densius pubescens, capite 

 postice truncato, thoraceque confertissime rugose punctatis, hoc subcampanu- 

 lato, elytris grosse minus dense punctatis, apice rufescente. Long. ]. 



Lee. Agassiz Lake Superior, 230. 



Very abundant on Lake Superior. Varies very much in color. The principal 

 varieties are : a., black, base of the elytra piceous : Q>. head and thorax 

 fuscous, antennas, legs and elytra testaceous, the latter with a broad black fascia 

 at the middle ; y. entirely testaceous, fascia of the elytra obsolete. The head 

 has a slight impression on the middle of the occiput, the frontal line is scarcely 

 visible. 



20. A. ephippium, subelongatus, testaceus, pubescens, capite postice fere 

 truncato, scabro-punctato, medio la?vi, thorace vix campanulato, confertissime 

 punctato, elytris grosse minus dense punctatis, fascia ad medium picea ornatis. 

 Long. !. 



Ferte, Anthic. 16S: 



New York. Very similar to the last, but is less elongate, and the head is 

 less rugous, with a broad frontal smooth line. I am somewhat in doubt if this 

 really is Ferte's species, as he makes no mention of the smooth frontal space. 

 It is, however, compared with the A. sellatus, in which this line is very 

 distinct, so that the probability is that it also existed in his A. ephippium. 



21. A. flavicans, testaceo-flavus, pubescens, capite postice subtruncato, 

 confertim punctato, medio laevi, thorace longiusculo, ovato, postice subangustato, 

 confertissime punctato, opaco, elytris sat dense grosse punctatis. Long. '12. 



Elongate, testaceous yellow, head and thorax a little darker. Head almost 

 truncate behind, not narrowed behind the eyes, which are large and prominent ; 

 densely punctured, frontal line smooth, broad. Antennae slender, very slightly 

 thickened externally. Thorax a little longer than wide, moderately convex, 

 rounded anteriorly, obliquely slightly narrowed to the base, which is strongly 

 margined ; neck very distinct, as in the other species of this group. E!ytra 

 one half wider than the thorax, elongate, humeri oblique, rounded ; disc ante- 



