254 ON THE AXATOMT AKD DEVEL0P3IENT OF COMTS INFELIX. 



YII. EXPLANATION OF THE PLATES. 

 Plate 11. 



Fig. 1. Portion of fern-frond attacked by Lecunium hemispharicujn var. filicum, the Coccid being 



parasitized by Comys infelisc. 

 Figs. 2j 3, 4, 5. Early stages in the development of the egg within the egg-tubes of Comys infelix. 

 Fig. 6. Fully formed egg previous to the disunion of the two parts, showing the valve-like apparatus on 



the connecting neck. A = true egg-mass ; B = yolk-mass. 



7. Egg after losing the yolk-ujass; the valve-apparatus is retained as a bifurcated foot to the stalk 



which is plugged with a quantity of protoplasmic matter. Egg-cases like this are found in the 

 host's body, and are often seen capping the tail of the larva. 



8. Valve-apparatus more highly magnified. 



9. Egg before the separation of the two masses, drawn on \ mm. scale. Length ="35 mm. ; length 



of stalk after separation ='05 mm. 



10. First observed larva with the bifurcated tail. Length ='75 mm. 



11. Mouth and mandibles of first larva, with buccal ghmds. VZ. Posterior segments of same. 



13. Larva just before tlie second instar, in which the tails are atrophying. 



14. Second instar in which the tails remain only as withered ends of the tracheae. s/?.'~- = spiracles. 



15. Third instar showiug imaginal discs. /.'"■' = leg-buds; s^'~^ = sting-buds; «._9'. = sexual glands. 



16. Prepupa in situ in the host (h.). (The insect is represented in an inverted position.) 



17. Prepupa i-emovcd from host Init still in its sheathing membrane («*.). ^>/. = oval red plates. 



18. Pupa in membrane. Length =2'25 mm. 



19. Comys infelix, ? , dorsal view. Length =2'5 mm. 20. The same, ventral view. 



Plate 12. 



Fig. 21. Ventral view of head. 



22. Mouth-parts in situ. z<./. = upper lip ; ??i(/. = mandible ; 7;. = maxillary palpi, 



23. Labial palpi. 24. Maxilla and palp {p.). 



25. Mandible, drawn on scale of .}^ mm. Length ='18 mm. 



26. Surface of face, with two ocelli and 1 art of an eye. 27. Surface of the eye. 



28. Hind wings, 3rd legs, and 3rd thoracic spiracles {sp.'). 



29. Dorsal view of thorax. c. = collar; *yj.i-" = spiracles ; ;jr. = pronotum ; ;. = tegul8e; sc.= 



scutellura. 



30. Second leg w ith tibial spur. 



31. First legs vith thoracic segment of attachment. 



32. Ventral view of abdomen of specimen distended with water, showing relative positions of parts. 



33. Lateral view of abdomen as seen in life, showing sting. 



34. Dorsal plates of abdomen and petiole. 



35. A''entral plates of abdomen flattened, sliowing petiole and sting. 



36. Dorsal plates and petiole, flattened. 



37. Fii'st ventral plate and petiole. 



38. End view of the tip of the abdomen, showing the arrangement of the plates round the anus. 



39. Tactile plate, in situ. 



40. Large functional spiracle on the 7th dorsal plate. 



41. Sting-apparatus. 



Figs. 42, 43. Tactile plate and hinge. 

 Fig. 44. Comys infelix, cJ , dorsal view. 



45. „ „ „ skeletal parts of the reproductive organs. ;). = penis; A. = hooks. 



