The animal parasites of man : a handbook for students and medical men / by Max Braun.

  • Braun, Max (Maximilian Gustav Christian Carl), 1850-1930.
Date:
1906
Catalogue details

Licence: In copyright

Credit: The animal parasites of man : a handbook for students and medical men / by Max Braun. Source: Wellcome Collection.

    435/488 (page 411)
    in Aldrichia as complete a scaly coat as any Culicine.—F. V. T.] An experienced observer can, however, diherentiate the two genera by the difference in size and their manner of resting. When settled they either touch the resting place with all the legs or only with the four anterior legs. In consequence of the different length of the legs, the body of Culex approaches the resting place more closely i moreover, Culex holds the abdomen parallel to, or at an acute angle to, the resting surface ; whereas Anipheles carries the abdomen directed upwards (at an Fig. 267.—Anopheles maculipennis, Meigen (enlarged). (After Grassi.) angle of about 145°) and holds the head down. Both genera, however, usually only rest on the four anterior legs, and then, as has long been known, Culex carries the third pair directed towards the dorsum, while those of Anopheles hang down. In regard to the differentiation of the species, I must refer you to the special literature, and content myself by observing that about 150 species of Culex and about 50 species of Anopheles have been described, of which 50 about four are found in Europe. [The number of known Anophelines now is at least 90 species, of other Culicidae about 580.—F. V. T.] According to our present knowledge it appears that the entire genns Anopheles can transmit malaria to man ; this observation has been con- firmed in Anopheles claviger, Fabr. ; A. maculipennis, Meig. ; A. hifurcatus, L. ; A. superpictus, Grassi ; A. pseudopictus, Gr., all of which are found in Italy,^ ' Compare Ficalbi, E., ‘‘ Venti spec, di zanzare [Cidicidce) ital. . .” [Bull, soc. entom. ital., 1899, xxxi. ; ref. in Centr. f. Baht., Paras, u. Inf., 1900, xxviii., p. 397.