upon the Larva o/Calosoma sycophanta. 239 



nerves (fig. 7.) and tracheae pass, which come from the great vessel 

 of the stigma. In the second segment of the thorax the muscular 

 system is more complicated. We see in the middle a small longitu- 

 dinal muscle (o), from which two small oblique branches (ij, jj.) go 

 to the middle of the breast. Under this longitudinal muscle may 

 be seen two others, one oblique (0) and one transverse (e), which 

 connect the beUy-side of the body with the back, as shown in the 

 right side of my drawing (fig. 9.). In the third segment of the tho- 

 rax the construction is nearly the same, but yet more complicated. 

 The longitudinal muscle is double (k), one superior, the other infe- 

 rior ; and between them we see at the anterior and posterior part of 

 the segment a large transverse muscle (v, (f), connecting both to- 

 gether. This same muscle is likewise at the posterior part of the 

 first segment, as represented in the figure at t. For the connexion 

 of the second and third segments is used a muscular cross, formed of 

 two muscles (\, X.), which come from the superior longitudinal mus- 

 cle on one side, passing to the opposite part of the second segment, 

 on which it is affixed before the foot under the longitudinal muscle. 

 The connexion of the back- and belly- side of the third segment is 

 eflfected by three muscles, two oblique (tt, /x.) and one transversal 

 (p), on each side. Lastly, we remark, for the connexion of the first 

 abdominal segment with the thorax, a pair of muscles, which arise 

 from the longitudinal muscle and go towards the middle of the an- 

 terior margin, on which they are affixed {y^. All these muscles 

 have their proper tracheae, which come from the neighbouring great 

 branch, already described, and delineated in fig. 9. 



The nervous system is composed of a long double thread, con- 

 nected together by thirteen ganglions, of which two are placed in 

 the head and the others in the body. The first ganglion lies upon 

 the oesophagus, and is called the brain, or more correctly the great 

 brain, because from it arise branches passing to the organs of sense, 

 namely, the eyes and the antennae. In fig. 12, we see this brain as a 

 transverse stripe, consti'icted in the middle, and attenuated on each 

 end into a fine thread, which is divided into six others. These are 

 the nerves for the eyes, which are more distinctly represented in 

 fig. 1 , b, b. From the great brain arise also the nerves for the an- 

 tennae, being simple threads, as exhibited in fig. 13, and fig. 7, a. a. 

 Moreover, from the anterior side of the brain two nerves (fig. 7, g, g.) 

 arise, which are furcate, and which go with the external branch to 

 the muscles in the forehead, with the internal to a little ganglion 

 which lies upon the oesophagus, as seen in fig. 13. From this little 

 ganglion arises a fine nerve, which returns to the brain, passing un- 

 der it, but not being connected with this organ, since it reaches its 



