240 Dr. Burmeister oji the Larva o/Calosoma sycophanta. 



hinder side, and attends the oesophagus to the stomach. In front of 

 this organ the nerve forms a little ganglion, which emits two nerves ; 

 and behind the brain the same nerve is divided into two branches 

 from two little ganglions, which are also connected with the brain, 

 and lie on the external side of the oesophagus. The second ganglion 

 of the head (fig. 7. F.), which I have named the little brain (in my 

 * Manual of Entomology,' vol. i. p. 297.), lies under the oesophagus, 

 upon a corneous fork, which I have figured in fig. 4, A., between 

 the great muscles of the mandibles (fig. 6. b, b.) With the great 

 brain it is connected by two thick nerves, embracing the oesophagus. 

 From this little brain arise eight nerves, four on each side, the exter- 

 nal one going to the mandibles (fig. 7./,/.), the two following to the 

 maxillse (fig. 7, e, d.) : the centre ones are the nerves of the labium 

 (fig. 7, c, c.) From the hind end aiise six nerves ; two thick ones go- 

 ing to the first ganglion of the body, the two external making a little 

 system of nerves for the muscles in the prothorax, and the other two 

 making a connecting system with the first abdominal ganglion, from 

 which go other small nen^es to the muscles and internal organs. The 

 first ganglion of the body (G,) lies in the first segment, which is af- 

 terwards the prothorax. From this ganglion arise the connecting 

 threads with the preceding and following ganglion, and three other 

 nerves ; the first of which goes to the muscles in the segment, the 

 middle one to the leg, and the hind one forms another connecting 

 nerve, which has a little ganglion, and from this various small nei'ves 

 are emitted to the muscles. The second ganglion of the body (H,) 

 has the same structure, but the nerves are somewhat larger, and the 

 nerve for the legs has several branches. The third ganglion (I,) has 

 also the same structure, but the hind connecting threads are not 

 connected with the fourth ganglion, which is only connected by the 

 two middle and greater threads. These two ganglions (I, K,) are 

 also the most contiguous of all, except the two last, which touch 

 each other. From the fourth ganglion arise the connecting threads 

 and two little muscular branches. The seven abdominal ganglions 

 possess a similar structure, and send out on each side three nerves, 

 from which one goes on the upper side of the longitudinal muscles, 

 and the two others under that organ ; the first of which we may re- 

 gard as the resj^iratory nerve, because it goes to the trachea on 

 each side, as is shown in the drawing (fig. 9.) : the other four are 

 muscular nerves. The last ganglion alone, which sends out other 

 smaller nerves in the middle, supplies some of them to the rectum 

 and the generative organs, of which I have found no sign in this 

 larva. Regarding the situation of the nervous system, we find it 

 placed at the lower part of the body, and in the central line, being 



