202 Harris on the genus Cychrus, 
dinalibus numerosissimis, marginibus violaceis. Length * 
six and a half, breadth two and a half lines.—He says of — 1 
the thorax that it is ** presque rond, d'un beau violet, échan- 
cré en avant, à bords latéraux trés-arrondis et fortement 
rebordés. Il offre, au milieu, une impression longitudi- jt í 
nàle assez forte, qui n'atteint pas les bords, et — 4 
autres situées en arrière larges et fortement ponctuées ;" 
and, in comparing it with the Spherddert Recenter, 
he says that the thorax is “plus ronde et 
If the Comte de Castelneau had not Me 
species ought to be placed between 5S. BA t f 
stenóstomus, we might, from the form of the thorax, be * 
led to suspect that it was more nearly related to Cy 
chrus or Scaphinotus ;: and, indeed, it seems to bring 
Spherdderus more closely than ever into connection 
with these genera. As this species is of large size, and 
was found on the island just above the falls of Niagara, 
it is to be hoped that it will not long escape the re- 
searches of our own naturalists who may be visiting that 
celebrated spot. 
Mr. Newman has proposed a new genus for what 
he considers as the Cychrus viduus of Déjean, but which 
I am assured by its captor, Mr. E. Doubleday, is no 
other than my C. Leonárdii. -This genus he names 
InrcunoA,* with the following characters and remarks: 
Instrumenta cibaria fer? Cychri, sed non eadem: man- . 
dibule intus dentibus duobus. minutis distantibus. in- 
— pones yore — Mu restrictus, trun- 
sf 4 Mg d 4 4 ud ; elytra 
"a 
Mus dupló latiora, conca; lateribus rotundatis, ca- 
* See Entomological Magazine, Vol. Iv. (No. 24, April, 1838) 
p. 385. d. : 
