470 INSECT A. 



in the preceding subgenera, the inner side of the last joints of the 

 antennse are dilated like the teet,h of a saw, and the thorax is plane(l). 



AcANTHOPUs, Meg. Dej. 



Shorter and rounder than the Insects of the preceding subgenus, 

 with simple antenna: terminated by a larger and ovoid joint; the 

 anterior thighs inflated and dentated, at least in one of the sexes, and 

 the tibiae almost linear with very short spurs, or almost none; ante- 

 rior tibiae arcuated(2). 



Amarygmus, Dalm. — Cnodalon^ Helops, Chrysomela, Fab. 



Allied to Acanthopus, with simple but filiform antennse, and the 

 anterior thighs neither inflated nor dentated. All the tibiae are 

 straight and terminated by very apparent spurs(3). 



Those, in which the thorax is inflated above, ovoid and truncated 

 at both ends, narrower throughout than the abdomen, with simple 

 antennae enlarging towards the extremity, and all the tibiae narrow, 

 long, and curved or arcuated, form the 



SpHiEUOTUs, Kirby(4). 

 The same naturalist comprises under the generic appellation of 



Adelium, Kirb. — Calosoma, Fab., 



Helopii, of an oval form, with the thorax wider than it is long, 

 almost orbicular, emarginated before, truncated behind, dilated and 

 arcuated laterally, and with almost filiform antennae, of which most of 

 the joints are in the form of a reversed cone. They more particu- 

 larly inhabit New Holland(5). 



Those species, in which the body forms an oblong oval, insensibly 

 arcuated and convex, or almost straight above, with simple antennae, 

 either filiform, or somewhat larger towards the extremity, particu- 

 larly in the females, and the thorax is almost square, or in the form 



(1) Spheniscus erytoloides, Kirb., Lin. Trans., XII, xsii, 4; Encj'c. Method., 

 article Sphcnisque. The Helopii suturalis and geniculaius of Germar form the 

 passage from this subgenus to Helops proper. 



(2) Helops dentipes, Panz., Ross.; — Helops dentipes, Fab., another species, but 

 from the East Indies. 



(3) Dalm., Anal. Entom., p. 60. The Helops ater. Fab., should also be referred 

 to this subgenus. 



(4) Sphserotus curvipes, Kirb., Lin. Trans., XXI, 15. 



(5) Melium calasomoides, Kirb., Ibid., XII, xxii, 2. 



