Sa’EUCTUEE AND BIOLOGY OP SCHIZONEDEA LANIGEEA. 689 
PI. 41, fig. 39). — These consist of four conspicuous hands of 
muscles lying- along- the ventral surface of the body, two on 
each side of the median line, and four beneath the dorsal 
integument. They are divided into two, three, or four 
bundles or fasciculi in each segment. 
On the ventral surface the two internal, ventral longi- 
tudinal bands {m.v'.), lie one on each side of the median line, 
and extend from the antero-veutral border of the prothorax 
to the eighth abdominal segment. 
The two external, ventral bands (m. v.) extend parallel to 
the lateral marg-ins of the body. They reach from the 
antero-ventral border of the first abdominal segment to the 
eighth segment. 
On the dorsal surface the two internal, dorsal longitudinal 
bands (m. d'.) extend from the eighth abdominal segment to 
the antero-dorsal border of the mesothorax, from which 
latter position each sends two diverging bands of muscles to 
the antero-dorsal border of the prothorax. 
The external, dorsal longitudinal muscles (m. J.) extend 
from the antero-dorsal border of the metathorax to the 
eighth abdominal segment. 
(2) ThelMusclesof the Head and its Appeudage.s 
(Pis. 39 and 40). — (a) The divaricator muscles of the pharynx 
{vi. 2 ^h.) are attached along the doi-sal or anterior wall of the 
pharynx, and extend to the anterior wall of the clypeus. From 
the region of the pharynx protuberances, stout bands of lateral 
clypeal muscles (m. 2>-) pass outwards to become attached to 
the side walls of the clypeus. 
(b) a few bands of lateral muscles (m./.) extend aci-oss 
the lobes of the clypeus. 
(c) Lying beneath the pharynx is the conspicuous pump 
muscle {l.p.m.), which is attached to the middle of the trans- 
verse bar and passes forwards beneath the pharynx, beitig 
inserted on the concave wall of the cylinder portion of the 
salivary pump (fig. 33). This muscle is divided longitudi- 
nally, and is spindle-shaped, being wider about the middle of 
its length. 
