604 ON THE GENUS DIPHLEBIA. 



EXPLANATION OF PLATES XIX.-XX. 



Plate xix. 



Fig. 1. — Nymph of Diphlehia hstoldes Selys ( x If). 



Fig. 2. — Nymph of Diphlehia nympho'ides, n.sp. ( x If), 



Fig. 3. — Caudal gills of nymph of D. lestoides 8elys ( x 3^). 



Fig. 4. — Left lateral lobe and part of mentum of labium of nymph of D. 



nympho'ides, n.sp.( x 12). 

 Fig. 5. — One-lialf of larval gizzard of D. lestoldes Selys ( x 30). 

 Fig. 6. — One-half of larval gizzard of D. nyynphoides, n.sp.( x 30). 

 Fig. 7. — Antenna of nymph of D. nympho'ides, n.sp. ( x 9). 

 Fig. 8. — Set of spines under front border of eye in nymph of D. nympho'ides, 



n.sp.{ x 7). 

 Fig. 9. — Head of D. lestoides ?, Selys, imago, to shew epicranial pattern 



(x4i). 

 Fig. 10. — Head of D. eupheo'idea 9, Tillyard, imago, to shew epicranial 



pattern ( x 4|). 

 Fig. 11. — D. nympho'ides 'i , n.sp., imago, to slievv epicranial pattern ( x 4^). 

 [N.B. — Figs. 9-11 are only intended to shew the epicranial pattern, and 

 should not be taken as accurate in otlier details.] 



Plate XX. 



Fig. 1.— Basal half of fore-wing of Diphlehia nymphoides, n.sp., S (x5). 

 Fig.2. — Appendages of D. lestoides Selys i ; a, dorsal; h, profile-view( x 10). 

 Fig.3. — Appendages of D. euphceoides Tillyard J ; a, dorsal, b, profile-view 



(xlO). 

 Fig.4. — Appendages of D. nympho'ides, n.sp., i ; a, dorsal, h, profile-view 



(xlO). 

 Fig. 5. — Appendages of D. hybrido'ides, n.sp., S ; a, dorsal, h, profile-view 



( X 10). 

 Fig. 6.- Colour-pattern of abdomen of D. lestoiden S ; «, an individual from 



Jindabyne, N.S. W.; h, an individual from Heathcote, Illawarra, 



N.S.W.(x2). 

 Fig. 7. — Colour-pattern of abdomen of D. euphoeo'ides S {x2). 

 Fig. 8. — Colour-pattern of abdomen of D. nympho'ides S { x 2). 

 Fig. 9. — Colour-pattern of abdomen of D. hybrido'ides S ( x 2). 



[N.B. — Figs. 6-9 represent a jet-black pattern on a l)rilliant blue ground.] 



