262 BACOT : MOSQUITOES AND THE DANGER OF MALARIA.
adequately, or not followed carefully enough, by the persons
finally entrusted to carry them out. There would also probably
be a great wastage and unnecessary expense in the purchase of
remedies and apparatus, together with weakness on the executive
side, leading to the very obvious oiling of ponds in public places,
while numerous smaller and less obvious, but more dangerous,
breeding-places in private grounds would escape attention.
EXPLANATION OF PLATES.
After Nuttall and Shipley ; by permission.
PLATE IV.
Fig. 1.—Side view of the head of a female Anopheles maculipennis, with
the various mouth-parts separated.
Fig. 2.—A small portion of the maxilla.
Fig. 3.—The very finely toothed sawing tip of the mandibles.
Fig. 4.—The much more coarsely toothed tip of the maxillae.
Fig. 5.—A segment of the antenna of a female Anopheles maculipennis.
Fig. 6.—A side view of the labellae and piercing organs of the proboscis
of a female Anopheles maculipennis. (The hypopharynx is not
shown.)
Fig. 7.—Side view of the head of a female Anopheles maculipennis, showing
the mechanism of biting.
Fig. 8.—Transverse section through the base of the proboscis and maxil-
lary palps close to the anterior end of the clypeus and through
the point of origin of the maxillary palps of a female Anopheles
maculipennis.
Fig. 9.—Transverse section through about the middle of the proboscis
of a female Anopheles maculipennis.
Fig. 10.—Transverse section through about the middle of the proboscis
of a male Anopheles maculipennis. The hypopharynx is fused
with the labium and there are no mandibles.
Fig. 11.—Left first maxilla and its palp.
EXPLANATION OF ABBREVIATIONS USED ON PLATE IV.
a. Antennae.
ap. Apodeme of 1st maxilla.
cl. Clypeus.
cs. Cephalic scales.
hp. Hypopharynx.
1. Labrum.
la. Labellae