DESCRIPTIONS OK PLATES. 653 



muscles of the mandibles, b b, Nerves of the antennae, a a, Nerves of the 

 eyes, cc, Cord of the oesophagus. PP, Nerves of muscles. A A, Small 

 ganglion of the sympathic nerve. B B, Branches to ditto. F, Nervus sym- 

 pathicus (which Lyonet did not discover here). Fig. 4, Brain of Melo- 

 lontka vulgaris (Straus). A, Cerebrum. B, Cerebellum, a a, Optic nerves. 

 b b, Nerves of the antennae, dd, First ganglion of the sympathic system. 

 G G, Second ganglion. D, Frontal ganglion, e e, Nerves of the mandibles. 

 ff, Nerves of the maxillae. Fig. 5, Cerebellum alone (ib,). ee, Nerves of 

 mandibles, ff, Ditto of maxillae, k k, Connecting cord with the cerebrum. 

 hh, Connecting cords to the first thoracic ganglia. Fig. 6, Cerebrum of 

 Gryllus migratoriits, with the sympathic system seen from above. A A, Optic 

 nerves. BB, Nerves of the antennae. , Frontal ganglion, b, First ganglion, 

 in which the odd (unpar.) nerve terminates, c c, The large ganglia, ee, The 

 small ditto, whence the sympathic nerve originates by two branches, which 

 again unite at d* and d*. e e, Small ganglia upon the oesophagus. //, First 

 ganglion upon the crop, g g, Second, which lies at the end of the crop. 

 h h, Nerves which pass between the blind appendages. Fig. 7, Brain of 

 Gryllus mifjratorius, seen from the front. A A, Optic nerves, a a, Nerves 

 which pass to the frontal ganglion. b b, Nerves of the antennae. * * a*, 

 Nerves to the ocelli, dd, Connecting cords between the cerebrum and cere- 

 bellum, d*, The connecting cord of these. B, Cerebellum, ee, Nerves of 

 the mandibles, ff, Nerves of the maxillae. 



PI. XXXII. Fig. 1, Brain of the larva of Calosoma sycophanta. A, Cere- 

 brum, a a, Optic nerves, bb, Nerves of the antenna, dd, Branches to the 

 frontal ganglion. D, Frontal ganglion. F, First ganglion of the sympathic 

 system, the posterior one I have not discovered. B, Cerebellum, ee, Nerves 

 of the mandibles, ff, Nerves of the maxillae, gg, Nerves of the labium. 

 Fig. 1, B, Commencement of the ganglionic ventral cord of the same larva. 

 k, Cerebellum, h h, Auxiliary connecting cord, with the first thoracic ganglion. 

 n n, Auxiliary ganglia. A A, Nerves of the anterior legs. L, First thoracic 

 ganglion, i i, Auxiliary connecting cords of the first and second ganglia, 

 forming small ganglia, mm. kk, Auxiliary connecting cords between the 

 second and third ganglia. M, Second thoracic ganglion. N, Third. O, Fourth. 

 pp, qq, rr, ss, Nerves of muscles. BB, Nerves of the intermediate legs. 

 C C, Nerves of the posterior legs. Fig. 2, The ventral cord of Dyticus mar- 

 yinalis. A A, Nerves of the anterior legs. B B, The intermediate ones. 

 C C, The posterior ones. Fig. 3, Ventral cord of the larva of Eristalis 

 ienax. Fig. 4, Ventral cord of the fly Erist. tenax. a a, Connecting cords 

 with the cerebellum. A A, Nerves of the anterior legs. B B, Of the inter- 

 mediate. C C, Of the posterior. b b, Branches of the muscles which pass 

 into the abdomen, d, First abdominal ganglion, c c, Branches of it. e, Second 

 abdominal ganglion. ff>hh,gg, Branches of it to the geuitalia and other 



