232 LOXOICORSIA. [Rhatjium. 



that it supported in its jaws 547 times its own weight ; this is in the 

 same proportion as if a man of 11 stone were to support 37^ tons, a 

 fact that shows clearly the enormous strength not only of the jaws, but 

 also of the neck and other muscles of the beetle." 



R. ladagrator, Gyll. (inquisitor, L., Thorns., H. R. W., nee F. and 



Brit. Cat.; tnvestiyatur, Muls.). Smaller on the average than the pre- 

 ceding, and easily distinguished, apart from otht-r diiferences, by having 

 the raised lines on the elytra continued almost to base, and the head 

 narrowed behind eyes ; the upper surface is clothed with pomnwhat 

 mottled greyish pubescence, the disc of the elytra being furnished with 

 more or less distinct and reticulate smooth black markings, and with 

 two more or less distinct black fasciae, one before and the other behind 

 middle ; the thorax has the anterior margin dull ferruginous, and a 

 somewhat smooth central line ; the legs are black, with the femora and 

 tibiae strongly pubescent. L. 12-16 mm. 



In the male the fifth ventral segment is truncate at apex, in the 

 female it is rounded and produced. 



Iu birch, fir, &c. ; very rare in England ; Shropshire (Stephens) ; Hainnult 

 Forest (Power); Keptou (Uarneys) ; I believe, however, that the two latter localities 

 are probably iu error, through wrong numbering or some other cause j Scotland, 

 locally common, Solwny (?), Tay, Dee, and Moray districts. 



R. bifasciatum, F. (bico/or, 01.; unifasciatum, Muls.). More 

 shining than the two preceding species, and with longer antennae ; 

 colour black with the elytra more or less reddish at sides and shoulders, 

 and with two very distinct ol lique testaceous fasciae on each, which in 

 certain not uncommon varieties are much enlarged and confluent, the 

 testaceous colour covering a gn'at part of the elytra ; very rarely they 

 are absent ; pubescence fine and scanty ; head scarcely narrowed behind 

 eyes ; antenna} ferruginous ; thorax with very strong lateral spines, and 

 with a smooth central longitudinal line ; elytra with well marked 

 shoulders, somewhat narrowed to apex, coarsely and rugosely punctured, 

 with raised lines which are more distinct behind, but are more or less 

 plainly continued to base ; legs black, with tarsi, femora, and tibiae all 

 more or less rufous. L. 14-20 mm. 



In decaying fir stumps, &c. ; somewhat local, but generally distributed throughout 

 the greater part of England and Wales ; Scotland, common in fir wood, Solway, 

 Tweed, Forth, Clyde, Tay, Dee, and Moray districts ; Ireland, Powerscourt (Dublin), 

 Newcastle, co. Down, and probably widely distributed. 



TOXOTUS, Serville. 



This genus contains about thirty species, which are chiefly found 

 in Europe, Northern Asia, and North America ; one has been desciibed 

 from Madagascar, but this is the only one that has occurred within 

 tropical limits ; of the live European species one only is found in 



