﻿Sept. 1895.] Packard. Scent Glands of Insects. 127 



EXPLANATION OF PLATE V. 



Fig. I. Anal eversible glands of Eleodes. (After Gissler.) 



Fig. 2. Anal eversible glands oi Blaps. (After Gilson.) 



Fig. 3. Anal glands (^agt) of Carabus hortensis ; rs, reservoir ; d, excretory duct ; 



2, intestine; r, rectum. (After Kolbe.) 

 Fig. 4. Prothoracic spraying apparatus of Cerura vinula; gl, the gland ; d, its duct, 



with tcenidia ; t, the spraying tubes ; vi, muscles; rm, retractor muscles. 



(After Kliemensiewicz.) 

 Fig. 5. The thoracic glandular sac of Macrurocampa martkesia; gl, the glandular 



sac ; d, its duct ; e, peritracheal epithelium ; t, the spiral threads or 



taenidia. 

 Fig. 6. Irregular separate masses of chitinous ridges on the cuticular lining of the 



wall of the sacs of Macrurocampa marthesia. 

 Fig. 7. Osmeterium {os) of the larva oi Papilio machaon at rest; rm, the retractor 



muscles at the ends ; m, the numerous oblique muscles ; dm, dorsal 



longitudinal muscles ; t, trachea; oe, oesophagus ; gang, brain ; I, head ; 



2, 3, 4, thoracic segments. 

 Fig. 8. Osmeterium (os^ of one side, enlarged ; g, glandular portion at the base ; d, 



depressions in the cuticula of the glandular portion; t, trachea. (This 



and Fig. 7 after Kliemensiewicz. ) 

 Fig. 9. Eversible dorsal glands {^ev. gl) of larva of Orgyia leucostigma in Stage II ; 



gc, glandular cells at bottom of the crater-like depression ; m, retractor 



muscle; /, poison gland-cells of the root of the seta (j); c, cuticula; 



hyp, hypodermis; A, portion of the cuticle and hypodermis enlarged. 

 Fig. 10. Lateral eversible gland oi Hyper cJiiria io. Stage II; r?)i, retractor muscle; 



oett, oenocytes. 

 Fig. II. The same as Fig. 10, but representing a section through one side of the 



eversible gland. 

 Fig. 12. A, end of body of Colcenis jiilia ; ev, eversible anal gland ; oa, odoriferous 



appendages ; B, the same in Heliconitis apseudes, side view ; C, odor- 

 iferous appendages of Colcsnis dido in fresh condition; D, tested with 



alcohol and benzine. 

 Fig. 13. Odoriferous appendages of /i'lf/eV^wzW (?«<rr(Z/'^, head cleansed — (Figs. 12- 



13 after F. Miiller.) 

 Fig. 14. Odoriferous glands {ogl) in the pupa of Vanessa ?'(?; r, rectum ; //, the 



folds of hypodermis which forms the terminal papilla of the abdomen ; 



oz/, oviduct. (After Jackson.) 



