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 punctato, medio levi, 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. confusus, elongatus, testaceus, albido pubescens, capite grosse 
punctato, postice rotundato, medio levi, thorace vix campanulato, lateribus 
postice oblique angustato, dense punctato, elytris grosse punctatis, fascia 
obscura ad medium ornatis. Long. -12. 
New York; Louisiana, Mr. Wapler ; Southern Ilinois, 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. 
Lec. An.) Lye. 5, 154. 
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, hoe subeampanu- 
lato, elytris grosse minus dense punctatis, apice rufescente. Long. -1. 
Lec. 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: @. head and thorax 
fuscous, antenna, 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. i 
20. A.ephippium, subelongatus, testaceus, pubescens, capite postice fere 
truncato, scabro-punctato, medio levi, thorace vix campanulato, confertissime 
punctato, elytris grosse minus dense punctatis, fascia ad medium picea ornatis. 
Long. «1. 
Ferté, Anthic. 163. 
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 Ferté’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 levi, 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. Antenne 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. Elytra 
one half wider than the thorax, elongate, humeri oblique, rounded; dise ante- 
