Thompson. — Anatomy of Mosquito. 
PLATE 12. 
Fig. 1. Pharynx and salivary pump of female mosquito ; seen partly in sec¬ 
tion and partly in surface view. 
Fig. 2. Semi-diagrammatic section of head of female mosquito, showing 
pharynx, antiia, and muscles. The section is supposed to pass near the 
midline above and anteriorly. It cuts across the base of the maxillary 
palp ( mxp ). the “head ” of the tentorium of the left side, and then sweeps 
outward to the origin of the lateral dilator muscles ( lat dil). The 
labium is sectioned along the midline. Only the proximal ends of the 
mouthparts are shown. On the “head” of the tentorium the origin of 
the inner (in ant) and outer muscles of the antenna can be noted. A 
portion of the retractor of the maxilla ( retr max ) is removed near the 
origin of the muscle to display the insertions of the protractor of the 
maxilla (prot max) and the maxillo-labial muscles ( max-li) on the 
free end of the maxillary apodeme (apo). The anterior end of the 
retractor muscles and apodeme are removed to show the insertion of the 
double retractor muscle (do retr) on the articular spur of the maxilla 
and the attachment of the hypopharyngeal muscle (Juyp m) to the salivary 
pump. The origin end of the hypopharyngeal muscle can be seen on the 
pharynx wall above the double retractor. The brain is sectioned, and 
the buccal ganglion (b gang), labial nerve, and one of the rudimentary 
ocelli (oc) are indicated. The left member of each pair of the elevators 
of the palate on the roof of the pharynx and of the pair of valvular 
muscles dorsad to the buccal ganglion at the entrance to the antlia has 
been cut off, leaving the muscles of the right side in place. The labral 
muscles in the clypeus also have been partly removed (la m). Behind the 
ascending pharyngeal muscles which bind the posterior ends of the phar¬ 
ynx to the vertex of the head ( asc ph) part of the vestigial anterior dor¬ 
sal dilator muscle of the antlia is visible. Below, the lateral pharyngeal 
muscle can be seen, passing from the outer face of the articular spur 
of the pharynx to the upper end of the tentorium. All the mandibular 
muscle, which runs from the “head ” of the tentorium to the mandible, is 
removed except the insertion end (mnd m) and below this can be seen 
the small maxillary muscle which extends from the wall of the pharynx 
to the maxilla. The slender tentorial muscle parallels the nerve cord 
and runs back into the thorax. The minute subocular muscle is not 
figured. 
