366 EXTERNAL ANATOMY OF INSECTS. 



three, convex, crystalline, simple eyes, observable 

 in the Frons or Vertex, or common to both a . — Ex. 

 Orthoptera, Hemiptera, Hyme7ioptera. 



10. Antennae (the Antennae). Two moveable and joint- 

 ed sensiferous organs, situated in the space between 

 or before the eyes, but in no instance behind them b . 

 They include the Torulus, Scapus, Pedicellus, and 

 Clavola. 



A Torulus (the Bed). The cavity or socket in which 

 the base of the Antenna is planted . 



B Scapus (the Scape). The first and in many cases the 

 most conspicuous joint of the Antennce A . It in- 

 cludes the Bulbus. 



a Bulbus (the Bulb). The base of the Scapus, by which it 

 inosculates in the Torulus, often subglobose, and look- 

 ing like a distinct joint e . It acts the part of a Botula, 

 being the pivot upon which the Antenna turns. 



C Pedicellus (the Pedicel). The second joint of the 

 Antenna f : in some insects acting also the part of a 

 Rotida in the socket of the Scapus, to give separate 

 motion to the Clavola. 



D Clavola (the Clavolet). The remaining joints of the 

 Antenna taken together s . It includes the Capitidum. 



a Capitulum (the Knob). The last joints of the Cla- 

 vola when suddenly larger than the rest h . 



iii. Subfacies (the Subface). The lower surface or under- 

 side of the head '. It includes the Lora and Jugulum. 



* Plate VI. Fig. 4, 10, VII. Fig. 1,2, 4. and XXVI. Fig. 3D — 41.1. 



b Plates XL XII. and XXV. 



c Plate VI. Fig. 1, 2. and VII. Fig. 1. i'. 



d Ibid. XII. Fig. 6, 9. k'. e Ibid. 1". ' Ibid. 1. 



c Ibid. Fig. 6. m'. h Ibid. Fig. 6, 8-10. m". 



1 Plate VI. Fig. 2, 8. e. 



