PUTNAM ON PULVINARIA INNtTMEEABILlS. 34:3 



Explanation of Plates XII and XIII. 



PULVINARIA INNtrjIERABILIS. • 



Fig. 1. Posterior portion of the generative organs of a female in Oc- 

 tober, about six weeks after fecundation ; a, spermatheca ; b, its wall ; c, 

 filamentary spermatozoa ; cZ-e, narrow neck leading from the sperma- 

 theca to the vagina ; e-m, vagina ; /, cavity in vagina above outlets of 

 oviducts, containing some not very well defined substance ; t, thick cel- 

 lular wall of vagina; /l,/l^ oviducts ; t-i^ supposed glandular enlargements 

 of oviducts [probably an erroneous observation]; k, outlet of the ovi- 

 ducts; i, supposed muscular contraction, [probable outlet of vaginal 

 glands] ; m, vulva ; o, six vulvular spines supposed to act as an oviposter ; 

 t, end of anal fissure, inturning of eighth segment ; q, q' suture between 

 Seventh and eighth segments ; n, n^ suture between sixth and seventh seg- 

 ments; _p, and r, wax-secreting spines on the seventh and eighth seg- 

 ments ; s, ventral wax-secreting pores ; s*", one of these more enlarged, 

 vshowing a number of fine pores set around a central tubercle. Magnified 

 »50 diameters. See page 323. 



Fig. 2. Minute spherical bodies having a vibratory motion, found in 

 the female, a, 300^, 6, 500 diameters. See page 326. 



Fig. 3. Spherical bodies found in female, probably immature and de- 

 tached ovicapsules ; a-i, different appearances of these bodies, 150 diam- 

 eters ; k, 330 diameters. See page 327. 



Fig. 4. Oval bodies, (Pseudo-navicellcB f) tonnd in female, once sup- 

 posed to be sperm atophoi-es ; a, 150 diameters ; 6-e, different forms, mag- 

 nified about 500 diameters. See page 326. 



Fig. 5. Groups or clusters of ovicapsules in various stages of forma- 

 tion as seen in the ovaries; a. a small immature group ; b. a larger, more 

 advanced group ; c, a tracheal tube sending branches to each cluster.; d, 

 membrane or tube to which the ovicapsules are attached — rather exag- 

 gerated in this figure. 50 diameters. Pages 323, 327. 



Figs. 6 to 17. Ovicapsules in various progressive stages of develop- 

 ment ; oc, membrane of ovicapsule ; ejj, layer of epithelial cells ; c/i, vi- 

 telline membrane in fig. 10, chorion in fig. 17 ; y, yolk or vitellus ; re, vitel- 

 liginous cells ; g, gathering of granules between the vitelliginous cells 

 connected with the vitellus by a filament; sp. sp'.(fig. 17) oval bodies, 

 [at the time of etching this plate supposed to be spermatophores] ; bl, 

 (fig. 17) blastoderm or granular layer spread over the surface of the yolk 

 with a gathering of granules at each end. [The shading of the vitellig- 

 inous cells in figs. 10 and 15 is an experimental blunder of etching, so 

 also in fig. 3,A-]- All magnified 100 diameters. See pages 32 -^-329. 



Fig. 18. Egg after having been laid, coated with minute rinsfs ; 50 

 diameters. [The outline should be symmetrical], a, two of the rings 

 magnified 350 diameters. See page 298. 



Figs. 19 to 23. Embryo in the egg in three stages of development ; 

 fig. 21 dorsal, 22, ventral, and 23, side views of the embryo just before 



' Pulvinaria acericorticis Fitch, ou Plate Xll, is a synonym. 



