20 Mr. A. Murray^s Monograph of the genus Catops. 



inner side, and a trochanter itself of a gouge-chisel-shaped form 

 without a tooth on the inner side. My readers must judge for 

 themselves as to this ; but I agree with Erichson in thinking that 

 the development of that part is variable, and I cannot agree with 

 M. Kraatz in putting bounds to the variation. 



The differences we have been considering are almost entirely 

 those between C. angustatus, Fab., and intermedius, Kr., on the 

 one part, and C. castaneus, St., on the other. It is much 

 more difficult to point out those between C. angustatus, F., and 

 intermedius, Kr. : as to these, I shall confine myself to referring 

 the reader to the distinctions pointed out by M. Kraatz himself 

 in his description of C. intermedius above quoted, merely ob- 

 serving that if I am right in joining together the much more 

 dissimilar forms of C. angustatus, F., and castaneus, St., we can 

 have no hesitation in refusing to make another species on the 

 strength of the almost imperceptible differences relied on by 

 M. Kraatz, a decision which a careful examination of the speci- 

 mens of intermedius so kindly furnished to me by that gentleman 

 has given me no reason to alter. If any of the varieties are to 

 be exalted into separate species, castaneus, St., is obviously the 

 one best entitled to this. 



Referring back then to my general comprehensive description 

 of this species above given (p. 13), I have only to add, that the 

 extreme, exam pies of the foregoing varieties may be known with- 

 out much difficulty by the following characters. The less decided 

 examples form intermediate steps, and it will often be found 

 scarcely possible to say to. which of the nearest varieties they 

 belong. rlinjii odi hjbi 



1." Pale ferruginous varieties. 



Var. A. Thorax widest at front, as shown in fig. 3 ; margins 

 paler than centre. 



Var. B. C. angustatus, Kraatz. Thorax widest not at the very 

 front, but a little before the middle, as in fig. 2 ; margins 

 paler than centre ; depressions on thorax not deep. Elytra 

 nearly parallel, darker at suture towards apex. 



Var. C. C. intermedius, Kraatz. Thorax a little broader than in 

 var. B ; margins paler than centre, with deeper depressions 

 on thorax. Elytra slightly widened in middle, entirely red 

 ferruginous. 



2. Dark chestnut variety. 



Var. D. C. castaneus, Sturm, Thorax widest in middle, as shown 

 in fig. 1, of a more solid consistence than the pale varieties ; 

 margins not paler than centre. 



This species is found over the whole of Europe, and Gebler 



