526 EXTERNAL ANATOMY OF INSECTS. 
fly which is similarly circumstanced, has the air of a 
serpent. Other Neuroptera, likewise, have a neck; as 
Hemerobius, Corydalis, &c. ‘This part presents no other 
features that merit notice. 
IV. Myoglyphides*-—The Myoglyphides, or muscle- 
notches, are sinuses, some shallow and some deeper, in 
the posterior margin of the upper side of the head, to 
which the levator muscles are affixed. ‘They seem prin- 
cipally confined to the Coleoptera ; though, in some 
cases at least, they may be traced in the Heteropterous 
Hemiptera. ‘These notches vary in number and depth 
in different insects. Thus in Buprestis there is only one 
deep one”: in Copris there are two shallow ones, in a 
deep sinus separated by a small prominence‘: in Elater 
and Lamia there are also two not in a sinus; and in 
Cordylia Palmarum there are four, two on each side, 
with a prominent lobe between them‘. To each of 
these notches, at its under margin, below the ligament 
that unites the occiput to the trunk, a muscle to raise 
the head is usually attached. 
* Pate XXVIL. Fic. 1, 3—5. n’. > Ibid. Fie. 3. 
* Ibid. Fie, 4. * Ibid. Fie. 1. 
