634 DESCRIPTIONS OF PLATES. 



the superior surface of the amnion. d, Main stem of the trachea, which lies 

 beneath the germen. 



PI. II. Fig. 1, Headless maggot of Musca vomitoria. A, a, The hook-shaped 

 seta? projecting from the mouth. B, The flat tail, a a, The two stigmata. 

 b bj The coronet of fringe surrounding them, c c, The pedal warts. Fig. 2, 

 The caterpillar, with anal feet only, of CEcophora Rajella (De Geer). Fig. 3, 

 Maggot with a head of Vespa vulgaris (ib.). Fig. 4, Larva of Lixus paraplec- 

 ticus. a, Head, b, Setiform feet, c, Anal propellers (ib.). Fig. 5, Pseudo- 

 caterpillar with five pair of ventral feet, and one anal proleg of an Hylotoma 

 (ib.). Fig. 6, Larva of Cetonia anrata (ib.). Fig. 7, Pseudo-caterpillar of 

 Cimlex (ib.). Fig. 8, Rat-tailed maggot of Eristalis tenax. a a, Anterior 

 air tubes, b, Anus, c, External sheath of the tail, d, Internal tube, e, Seti- 

 form crown at the apex, f, Mouth with furcate mandibles. Fig. 9, Caterpillar 

 of Pieris Machaon with the tentacula? of the neck extended. Fig. 10, Caterpillar 

 of Plusia gamma (Sepp.). Fig. 11, Geometer caterpillar of Phalana betularia 

 (De Geer). Fig. 12, Caterpillar without anal proleg of Harpyia vinula (Sepp.). 

 Fig. 13, Caterpillar's head with its organs, a, Upper lip. b b, Upper man- 

 dibles, o c, Lower maxilla?, d, Under lip with the spinneret. //, Antennae. 

 9 <Ji Eyes. Fig. 14, Under lip of the caterpillar of Cossus ligniperda seen 

 externally (Lyonet). a, Spinneret, b b, Sheath surrounding the base of the 

 spinneret, c c, Maxillary palpi, dd, Labium. Fig. 15, Head of the cater- 

 pillar of Vanessa prorsa. Fig. 16, Head of the caterpillar of Apatura iris. 

 Fig. 17, Feet of the caterpillar of Cossus ligniperda (Lyonet). a, Part of the 

 ventral membrane, b, Coxa, c, Trochanter. d, Femur, e, Tibia. /, Tarsus. 

 g, Claw. Fig. 18, Ventral or proleg of the same caterpillar with a double 

 coronet of booklets (ib.). Fig. 19, Pupa of Sphinx Ligustri. a, Head-case. 

 b, Eye-case, c, Tongue-case, d d, Leg-cases, e, Antenna-case. /, Case of 

 the prothorax. </, Case of the mesothorax. d,Of the metathorax. ii, Of the 

 ventral segments, k k, Spiracles. I /, Kirby and Spence's adminicula. m, Case 

 of the superior wings, n, Of the under wings, p, Cremaster. Fig. 20, Pendent 

 pupa of Hipparchia JEgeria (Sepp.). Fig. 21, Enclosed pupa of Musca 

 vomitoria. Fig. 22, Cremaster of the pupa of Noctua dissimilis (Knoch). 

 Fig. 23, Cremaster of the pupa of Noctua lucipara (ib.). Fig. 24, Pupa of 

 neuter bee (Swam.). Fig. 25, a, Cremaster of the pupa of Harpya Fayi 

 (Knoch). b, Cremaster of the pupa of Euprepia mendica(ib.)- Fig.26,Bound 

 pupa of Pontia Cratcegi. Fig. 27, Larva case of Stratiomys chameleon (S wamm.). 

 a, Head, b, Coronet of selae around the spiracle at the tail, c c, The pupa 

 shining through. 



PI. III. Fig. 1, Larva of Phryganea, with the case in which it dwells 

 (De Geer). Fig. 2, Larva of Ephemera, a a, Lateral branchial leaves, b b, 

 Rudiments of wings (ib.). Fig. 3, Larva'of Culex. a, Air tube, b, Anal 



