COLEOPTERA. 61 
Those, in which the thorax is inflated above, ovoid and truncated 
at both ends, narrower throughout than the abdomen, with simple 
antennz enlarging towards the extremity, and all the tibie narrow, 
long, and curved or arcuated, form the 
Sprmrotus, Hirby * 
The same naturalist comprises under the generic appellation of 
Aveuium, Airb.—Catosoma, Fab. 
Helopii, of an oval form, with the thorax wider that it is long, 
almost orbicular, emarginated before, truncated behind, dilated and 
arcuated laterally, and with almost filiform antenne, of which most of 
the joints are in the form of a reversed cone. They more particu- 
larly inhabit New Holland +. 
Those species, in which the body forms an oblong oval, insensibly 
arcuated and convex, or almost straight above, with simple antennz, 
either filiform, or somewhat larger towards the extremity, particu- 
larly in the females. and the thorax is almost square, or in the form 
of an elongated heart, truncated posteriorly, form two other sub- 
generat. In. 
Hetoprs, Fab. 
Or Helops, properly so styled, most of the joints of the antenne 
are almost obconical or cylindrical, and attenuated at base. The 
thorax is transversal, or hardly as long as it is wide, either square 
or trapezoidal, or cordiform, abruptly narrowed posteriorly, termi- 
nated by pointed angles, and always exactly applied to the base of the 
elytra §. 
Lena, Meq., De7—He ors, Fab.—Scavrus, Sturm. 
The antenne generally composed, at least in the females, of short 
turbiniform joints, the last of which is thicker than the preceding 
ones and ovoid. The thorax is almost in the form of a truncated 
heart, elevated or convex above, separated from the abdomen by a 
considerable hiatus, and with the angles obtuse or rounded. The 
thighs, particularly the anterior ones, are inflated ||. 
The last Helopii have the body elongated, narrow, almost of the 
same width throughout 4, and either thick and almost cylindrical, 
or much depressed. The thorax is nearly square, or almost in the 
form of a truncated heart. 
Those, in which the body is tolerably thick, almost cylindrical or 
* Spherotus curvipes, Kirb., Lin. Trans. XXI. 15. 
yt Adelium calasomoides, Kirb., Ubid., XII. xxii, 2. 
{ The two or four anterior tarsi are dilated and pilose beneath in several males. 
§ The Helops ceruleus, lanipes, caraboides, Fab. ; the Helops arboleus, gracilis, of 
Fischer—Entom. Russ., II, xxii, 4, 5—and several other species foreign to France. 
Talso refer to it the Catops flavipes of the first, which, as well as his Helops obli- 
quatus, seems to form the transition from Amarygmus to the H. caraboides. 
|| Lena pimelia, Dej., Catal.; Helops pimelia, Fab.; Scaurus viennensis, Sturm ; 
Lena pulchella, Fisch., Entomog. Imp. Russ., II, xxii, 8; var. ? 
4] Rather narrower before. 
