100 Mr. Kirsy on Mr. W. S. MacLeay's 
tellum triangulare. Elytra oblonga latere exteriori mar- 
ginata: margine subrecurvo, apice obtusissima, vel ob- 
lique subtruncata : epipleura lineari apud basin elytri di- 
latata. Pedes breves: femoribus magnis compressis ; 
tibiis tenuioribus ; calcaribus 2. 2. 2. ; anticis intus ante 
medium emarginatis*: tarsis subsetaceis; articulo pe- 
nultimo integro: unguiculis binis simplicibus. 
ABDOMEN depressum: segmentis ventralibus sex; tertio 
reliquis longiori; anali obtusissimo. 
Catascopus merely assumes the aspect of a section different 
from that to which it really belongs, while every one sees at 
first sight that it is one of the Carabi of Linné; but the insect I 
have now described, though it exhibits the characters, has not 
the aspect, of that tribe ; and even a practical entomologist, if he 
chanced to examine a specimen that had lost its antennz, might 
at first regard it as a Nitidula or Ips F., or as coming near that 
genus in the system. But when he came to study it in detail, he 
would discover, to his surprise, all the essential diagnostics of 
one of Latreille's Entomophagi, as six palpit, and the trochanter 
forming a fulcrum to the posterior thigh}; and further, those 
that distinguish the Carabici of that author, the same kind of 
labium, mentum, and waaille, and particularly the remarkable 
notch in the inside of the anterior tibia, before noticed, peculiar 
to them. "The characters that give it an air and general appear- 
ance unlike those of its tribe, are its sessile wide head received 
into the thorax, and its short antenn: and legs§. 
It is difficult to say to which of Latreille's sections of his Cara- 
* TAB. III. Fig. 3. g. a. 
+ What has been accounted by Fabricius and others. as an additional or inner max- 
illary palpus is, strictly speaking, the outer or upper lobe of the maxilla become palpi- 
form. In Staphylinus, &c. this lobe is also biarticulate but not palpiform. 
+ TAB. II. Fig.3.h.a. 8 The legs are made rather too long in the Figure. 
bici 
