. Animal parasites and human disease. Medical parasitology; Insects as carriers of disease. 426 MOSQUITOES as to need no description, but the details of their structure is as little known by most people as are those of the structure of other insects. The diagram on page 425 (Fig. 188) illustrates the details of the parts of a mosquito which are of most use in iden- tifying and classifying. The sexes can be distinguished most readily by the antennae; in the female (Fig. 190A) they are long and slender with a whorl of short hairs at each joint, whereas in the male (Fig. 190B) they are shortened
. Animal parasites and human disease. Medical parasitology; Insects as carriers of disease. 426 MOSQUITOES as to need no description, but the details of their structure is as little known by most people as are those of the structure of other insects. The diagram on page 425 (Fig. 188) illustrates the details of the parts of a mosquito which are of most use in iden- tifying and classifying. The sexes can be distinguished most readily by the antennae; in the female (Fig. 190A) they are long and slender with a whorl of short hairs at each joint, whereas in the male (Fig. 190B) they are shortened and have a feathery appearance, due to tufts of long and numerous hairs at the joints. In many mosquitoes the palpi also furnish a means of. Fig. 190. Heads of female (Ji) and male (q) mosqmto, Culiseta incidens: ant., antenna; b. j. ant., basal joint of antenna; label., labellum; palp., palpus; prob., proboscis. distinguishing the sexes; they are usually long in the males but short in the females, but in Anopheles they are long in both sexes, and in some mosquitoes, , Uranotcenia, they are short in both. The proboscis, which is the most fearful part of a mosquito, also differs in the sexes, and fortunately is so constructed in the male that a mosquito of this sex could not pierce flesh if he would. At first glance the proboscis appears to be a simple bristle, some- times curved, but when dissected and examined with a micro- scope it is found to consist of a number of needle-hke organs. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Chandler, Asa Crawford, 1891-. New York, J. Wiley
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