14 MR. P. R. AWATI ON THE MECHANISM 
(3) The Protractors of the Stylets. (Text-fig. 6, Mx.P., Md.P.) 
(a) The Protractors of the Mandibles. (Text-figs. hes 19, 
etc., Md.P.) 
These muscles are attached at one end to the distal ends of the 
levers of the mandibles (and not to the mandibles themselves), and 
at the other to the clypeal folds, which run into the head to a 
considerable distance. They are short and thick, and run obliquely 
Text-figure 23. 
| 
| 
Yd Se me Mx. St. 
Md C 
Md.H. 
T. Mx. 
T. Md. 
Lygus pabulinus. 
Tips of the stylets, showing the recurved hooks of the mandibles and smoothness 
of the maxillary stylets. Immersion-lens & Oc. 4. 
For explanation of the lettering see p. 693. 
from one to the other. Their attachment at the distal ends of 
the levers makes it easy to pull the latter down with the mandibles. 
There is no hinge-like device at the bases of the levers, but when 
they are pulled down they do not, I think, regain their normal 
