wide at base as anteriorly ; the interstitial sjja- 
oes also are much more .flattened , 
2. A. orticoZZw, Black ; thorax rounded ; third 
interstitial line with three punctures. 
Inhab. Mexico. 
black, polished, impunetured ; antennoi 
' ■ , basal joint, and palpi jiiceous : thorax or- 
.bicular, truncate before and slightly so behind ; 
lateral edge regularly arquated, not depressed, 
but with a simple and equally elevated edge ;~ 
dorsal line obsolete, anterior and posterior trans- 
verse lines obsolete ; basal impressed lines or 
dots distinct ; elytra with well impressed strias, 
which are crenate, not punctured ; interstitial 
lines convex, the third from the suture with three 
equidistant punctures : feet piceous. 
Length nearly seven-twentieths of an inch. 
Size of A. viduum, Fabr., with similar punC' 
tures on the third interstitial line, excepting that 
they are equidistant, and these lines are more 
convex, the thorax is much more orbicular, the 
feet differently coloured, and there is no brassy 
reflection. This cannot be the melanarium, Bej., 
for the strise are as obvious as in the viduum, emd 
although the thorax agrees with that insect in 
being “ plus etroit” than that of the viduum, yet 
it would not be described as “ subrotundato,” as 
that author applies the same term to designate the 
form of the thorax of viduum. It is much like 
A. punctiformis, Say, but it is a little more elon- 
gated, the thoracic lines are much less distinct, 
&c. 
3. A. nutans. Say, (Feronia) Trans. Amer- 
Philos. Soc. Since described by Dejean with 
the name of striatopunctatum. 
4. A. errans, Say, (Feronia) Journ. Acad. 
Nat. Sc. The interstitial space has three punc- 
tures, of which the first and second are somewhat 
nearer than the second and third. 
5. A. punch/orwis. Say, (Feronia) Trans. Am. 
Philos. Soc. I have an individual that has four 
punctures on the third interstitial space as De- 
jean describes his aibicrus to have. 
6. A. obsoleta, Say, (Feronia) Trans. Amer. 
Philos. Soc. Since described by Dejean by the 
name of luctuosum, Sp. Gen. 3, 172. 
7. A. limbatum, Say, (Feronia) Trans. Amer. 
Philos. Soc. Since described by Dejean by the 
name of palliatum, Sp. Gen. 3, 174. 
OLISTHOPTJS, Dejean. 
1. O. parmatiis, Say, (Feronia) Trans. Amer. 
Philos. Soc. Dej. Sp. Gen. 3, p. 181. 
2. O, cinctus, Blackish ; e%e of the thorax, 
elytra and feet -dull rufous. 
Inhab . Pennsyl vam a . 
Body blackish ; head impunetured : antennm 
dusky, pale rufous at base : palpi piceous ; tho- 
rax with the dorsal and anterior lines almost ob 
solete ; lateral narrow margin obviously rufous ; 
lateral basal impressions very distinct, suborhic- 
