328 
Hermaphroditism etc. in Pediculus 
Fig. 3. Pediculus humanus race corporis Specimen 7. <$ ventral plate bipartite. $ ventral plate 
roughly annular. Vagina prolapsed. Two pairs of protrusions bearing sensory hairs and 
probably representing the posterior abdominal lobes ( x) and gonopods (y) of 
PLATE XVII. 
Pediculus humanus race corporis except Fig. 8 All from Lot 273. collected in Sydney, 
New South Wales. 
Fig. 1. Specimen 9. $ ventral plate bipartite, the intervening space occupied by a strongly 
chitinized invagination ( invag.gen., slightly schematized) representing the external $ genitalia. 
Fig. 2. Specimen 14. Gonopodial invagination with sensory hairs (corresponding to g.i. in the 
following Fig. 3). 
Fig. 3. Specimen 14. ventral plate and gonopodial invagination (g.i.) and gonopodial spot 
( gon.s.). 
Fig. 4. Specimen 1. The same specimen as figured in PI. XV, fig. 1, but seen in dorsal aspect. 
Posterior abdominal lobes rudimentary. 
Fig. 5. Specimen 16. Structures similar to those described in Fig. 3. 
Fig. 6. Specimen 2. The same specimen as that figured in PI. XV, fig. 2, but seen in dorsal 
aspect. It shows posterior abdominal lobes ( p.l.). 
Fig. 7. Specimen 17. Structures similar to those shown in Figs. 2, 5. 
Fig. 8. Specimen 26 (j$). Chitinous invagination with sensory hairs ( h.) situate as shown in 
Text-fig. 11 (p. 294). 
Fig. 9. Specimen 15. Structures similar to those shown in Figs. 2, 5, 7. 
KEY TO LETTERING IN PLATES. 
acc.gl. = accessory gland of $ genitalia; an. = anus; b.p. = basal plate of <$ genitalia; d.b. = dorsal 
bands; d.ej. =ductus ejaculatorius; dil. = dilator (rf); ext. =antero-lateral extension of ventral 
plate in $; gon.= gonopod; gon.invag. and g.i. = gonopodial invagination (abnormal); gon.s. = 
gonopodial spot (abnormal); h. =hair or hairs, sensory; invag.gen.— invaginated genitalia 
(abnormal); m. = muscle; mg.= midgut; ov.= ova or ovary; p.1. — j>osterior abdominal lobes of 
$; pen. =penis; red. = rectum; £. =testis; tr. =tracheae; vag.p. = vaginal prolapse (abnormal); 
v.pl.— ventral plate of or $; v.sem. — vesica seminalis. 
