100 Mr. KiRBY on Mr. W. S. MacLeai/'s 



tellum triangulare. Elytra oblonga latere exteriori mar- 

 ginata : margine subrecurvo, apice obtusissima, vel ob- 

 lique subtruncata : epipleura linear! 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 Linn6 ; 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 antennae, 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 palpi t, and the trochanter 

 forming a fulcrum to the posterior thigh J; and further, those 

 that distinguish the Carabici of that author, the same kind of 

 labium, mentum, and maxilla, 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 antennae 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 maxillae become palpi- 

 form. In Staphylinm, &c. this lobe is also biarticulate but not palpiform. 



;}: Tab. III. Fig. S. h. a. § The legs are made rather too long in the Figure. 



bid 



