Vlll EXPLANATION OF PLATES. 



Terebrae valvula, exterior. Thrips atrata. 

 „ „ interior. „ „ 



Terebra integra. „ „ 



Theca ex ovariis. 



Vasa dubia geraina prope os, cum apicibus ovarii connexa, 

 etiam in larvis obvia ; in Tubuliferis pariter adsunt. 



Ovum maturura. 



Intestinum. Thrips ru fa, ^ . a. (Esophagus. 6. Inglu- 

 vies. c. Proventriculus. d. Duodenum, e. Intestinum 

 lenue. /. Rectum, g. Vasa hepatica " malpighiana " 

 dicta, h. Ductus salivae ? i. Vasa praedicta dubia. 



Portio ejusdem. Thrips vulgatissima. 



Insertio vasum hepaticorum. 



Intestinum. Sericothrips. 



Frustum e ductu salivari (optical deception ?) 



Intestinum. Limothrips cerealium^ larva. 



Vasa dubia. „ „ 



Thrips obscura. Ingluvies, Sec. 



Thorax, Sec, a latere. Thrips cerealium. 



Pagina infera. „ 



Portio magis aucta, ut exhibeat spiraculum prothoracis, x. 



Tracheae in Thr. rufa. 



Coleothrips fasciata. Head in front. 



Do. behind. 33. Labium. 34. Maxillary palpus. 



Labial palpus. 36. Maxilla. 37. Labrum. 



Hemelytron, the hairs omitted. 39. Tarsus. 40. End of 

 antenna. 41. Antenna of larva. 42. End of abdomen 

 of larva. 



Thrips Ulicis. Antenna. 



Do. Fore tibia and tarsus. 



Tab. VIII. 



Fig. I, Medullary system of PhlcBothrips Pini. 



„ 2. The position of cephalic lobes in pupa of Thrips cerealium, 

 with the passage of oesophagus. 



„ 3 and 4. The lobes of cephalic ganglion and emergence of 

 oesophagus in Phlceothrips. c. (Esophagus, d. Recur- 

 rent salivary duct of one side. e. Ingluvies. 



„ 5. Optic nerve. 



„ 6. Intestinal canal of PA/(go<An;)5. a. Head. 6. (Esophagus. 

 c. Ingluvies. d. Proventriculus. /. Duodenum, g. 

 Intestinum tenue. A. Vasa hepatica. i. Rectum. 



