EXPLANATION OF PLATES. 



Fig. 7. Position of the rectum, with relation to the terminal 



segments. P. Statices. 

 „ 8. Inflated insertion of malpighian vessels {d.) in a male of 



P. Statices. a. Duodenum, b. Small intestine, c. 



Rectum. 

 „ 9, 10, 1 1 . Reproductive system in PA/«o</tnj9^, $. h". Testes. 



h'. Deferentia. c. Vesiculee pares, d^e. Vesiculae im- 



pares. a. Utriculus prae canali excretorio. 

 „ 12. The ovaries of P. Statices, $. 



„ 13. Unfertilized ovary in 9 newly transformed P. Pini. 

 „ 14. End of one of the egg-sheaths. 

 „ 15, Full-grown egg. 

 „ 16. Do. in another stage? 

 „ 17. Mouth with a salivary receptacle.'' in situ. P. Pini. 



a. labrum. c. maxilla. 

 „ 18. Excretory canal of saliva glands? 

 „ 19. The saliva gland? 

 „ 20. The pair, (see fig. 16 of plate 7). 

 „ 21, 22. The two salivary receptacles of one side? (Very 



doubtful). 

 „ 23. Tip of haustellum, in situ. Phlceothrips. 

 „ 24. End of labrum. 

 „ 25. End of maxillary palpus. 

 „ 26. The labrum and maxilla in juxtaposition, y. Double 



membranous lining of labrum. 

 „ 27. Labrum. 

 „ 28. Labium. 

 „ 29. Mandibles. 

 „ 30. Maxilla of Idolothrips. 

 „ 31 . End of mouth, with emerging mandibles. 

 „ 32. Mandible or tongue. 

 „ 33. Mouth of Phlceothrips Pini, larva. 

 „ 34. Horny spots at base of do. 



