Arising as a long tendon from the sterno-scapular ligament, it passes the axilla by means of a fibrous pulley, accompanies the axillary vessels and nerves along the humerus, and is inserted by a few fleshy fibres on the base of the last two or three cubital quills.
From another hinder trunk arise the two-branched cubital nervure and three separate anal nervures.
There are several curved median and cubital nervures and a single anal, but few cross nervures or areolets.
The ulna is curved and rather stout; it articulates with both carpal bones; the cubital quills often cause rugosities on its dorsal surface.
This, the stretcher of the cubital quills, is a very interesting muscle.
II, 12, cubital or branchial; 7.
The feelers are long and simple, and the wings are very narrow, each with a sub-costal, a radial, a median and a cubital nervure; the branches of the median and the cubital, however, as well as the anal nervures, are vestigial, and there are a few short cross-bars between After Marlatt, Ent.