TOMOCERUS. 137 



Tomocerus longicorniSi MuUer. 



Podwa longicornis, Muller. Zool. Dan. Prod., 1776. 



— — O. Fabr, Kong. Dansk. Yid. Sels. Skr., 1783. 



Macrotoma longicornis, Bourl. Mem. Soc. Roy. Lille, 1839. 



— ferruginosa „ ,, „ „ 

 Tomocerus ]plumbeus, Nicolet. Mem. Soc. Helv., 1842. 

 Macrotoma spiricornis, Bourl. Mem. Soc. Roy. Douai, 1842. 



— longicornis, Gervais. His. Int. Apteres. 



— ferruginosa, „ „ „ 

 Tomocerus plumheus, Nicolet. Mem. Soc. Ent. France, 1849. 

 Macrotoma plumhea, Lubbock. Linn. Trans., 1862. 



Plates XYII and XYIII. 



Colour, with scales, leaden ; without them, yellow, 

 with pale lateral markings on the mesothorax. 

 Antennae longer than the body. Anterior abdominal 

 segment a little narrower than those on each side of 

 it ; fourth abdominal segment cylindrical, but more 

 curved at the posterior margin than in Nicolet's figure. 

 There is also a pale narrow line running down the 

 back to the hinder end of the third abdominal segment. 

 Legs hairy and scaly throughout, at least except the 

 tarsus. 



Length "25 of an inch. 



One of the mandibles has five teeth, the other four. 



The three pairs of feet are very similar to one 

 another, though in my specimens the extremity of the 

 small claw seemed to be more elongated in the 

 posterior foot than in the other two. The tarsus is 

 provided with a single tenent hair and two unequal 

 claws. The tenent hair is large and strong. The 

 larger, outer claw has three equidistant spines on the 

 under margin. The lesser claw has a very small 

 spine on the outer margin. 



The two branches of the caudal appendage have on 

 their upper side, near the base, a row of about nine 

 small, simple, black spines, the hindermost of which is 

 affixed rather further from the side than the others. 

 The largest spine is yo%Qths of an inch in length, the 



