Explanation of Plate XV. 



Fig. 1. Callipappus farinosus, adult $ side view ; 1 a, diagram of 

 section of same ; A, the marsiipium ; B, the genital 

 orifice ; C, the larval exit ; D D D, the body cavity ; 1 b, 

 posterior view, showing the slit-like larval exit (all 

 natural size) ; 1 c, fragments of secretion (enlarged). 



2. Callipappns h(fo, adult $ side view ; 2 a, posterior view, 



sliowing triangular larval exit (both natural size) ; 2 b, 

 antennte of larva ; 2 c, end of abdomen of larva (both 

 enlarged). 



3. Callipappus westicoocU, adult 9 ^^^^ view, the ventral, 



larval exit at a (natural size) ; 3 a, fragment of secretion 

 (enlarged). 



4. Eriococcus eleyans, adult $ s mi sitn ( x 1.5). 



5. „ cypraeaeformis, adult $ s in situ ( x 2). 



6. „ tricarinatus, test of adult 5 , dorsal view ; G a, 



end view (enlarged). 



7. „ hakea?; anal tubercle of adult $ (enlarged). 



8. „ apiomorphee, „ „ ,, 



9. „ gurneyi, filament of immature 9 (enlarged). 



10. OHi^a encaZi/p^t, anal tubercles, etc., of adult $ (enlarged). 



11. Rhizococcus tripaHitus, adult 9^ '^'^ situ; 11a, side view 



( X 2) ; 11 b, antenna of 9 (enlarged). 



12. Apiomorpha helmsii, galls of adult 9 5 12 a, immature 9 



gall ; 12 6, 9 g^l^ (^^^ natural size). 



13. „ cunirbita, ajsex of 9 gall ; 13r/, section of same 



(natural size). 



14. „ maliformis, section of apex of 9 gall (reduced). 



15. „ pomifoi-mis, ,, „ ,, ,, 



16. Sphserococcus tepperi, social gall (natural size). 



17. „ socialis, social gall (natural size). 



18. „ tormentos^is, test of adult 9 (natural size). 



19. „ „ antenna of 9 (enlarged). 



20. „ ethelse, twig aborted by attack of (natural size). 



21. „ leaii, adult and immature 9 galls (natural 



size). 



22. „ morrisoni, gall of 9 (natural size) ; 22 a, 



section of same. 



23. „ morrisoni, var. elongata, gall of 9 (natural size). 



