EXTERNAL ANATOMY OF INSECTS. 365 
9, StemMata (the Eyelets). ‘Two, or more commonly 
three, convex, crystalline, simple eyes, observable 
in the Frons or Vertex, or common to both*.—Ex. 
_  Orthoptera, Hemiptera, Hymenoptera. 
10. ANTENNZ (the Antenne). Two moveable and jointed 
sensiferous organs, situated in the space between 
or before the eyes, but in no instance behind them”. 
They include the Torulus, Scapus, Pedicellus, and 
Clavola. 
A. Torutus (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 Antenne*. It in- 
cludes the Bulbus. 
a. Buxsus (the Bulb). The base of the Scapus, by which 
it inosculates in the Torulus, often subglobose, and 
looking like a distinct joint®. It acts the part of 
a Rotula, being the pivot upon which the Antenna 
turns. 
C. PepicELuus (the Pedicel). The second joint of the 
Antenna‘: in some insects acting also the part of a 
Rotula in the socket of the Scapus, to give separate 
motion to the Clavola. 
D. Cxavoxa (the Clavolet). The remaining joints of the 
Antenna taken together &. It includes the Capztulum. 
a. CapituLuM (the Knod). The last joints of the Cla- 
vola when suddenly larger than the rest". 
* Prate VI. Fic. 4, 10. VII. Fic. 1, 2, 4. and XXVI. Fie. 39— 
41.1. > Prates XI. XII. and XXV. 
© Prate VI. Fic. 1, 2. and VII. Fre. 1. i/. 
‘ Prate XII. Fic. 6, 9. k’. © Jbid. 1" £ Ibid. 1. 
® Ibid. Fic. 6. m’. h Ibid. Fic. 6, 8—10. m". 
