MOSQUITOES 



in Aldrichia as complete a scaly coat as any Culicine. F. V. T.] An experienced 

 observer can, however, differentiate 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 ; 

 moreover, Culex holds the abdomen parallel to, or at an acute angle to, the 

 resting surface ; whereas Anopheles 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 



genus Anopheles can transmit malaria to man ; this observation has been con- 

 firmed in Anopheles claviger, Fabr. ; A. maculipennis, Meig. ; A. bifurcatus, L. ; 

 A. superpictus, Grassi ; A. pseudopictus, Gr., all of which are found in Italy, 1 



1 Compare Ficalbi, E., " Venti spec, di zanzare (Culicida;) ital. . ." (Bull. 

 soc. entom. ital., 1899, 'xxxi. ; ref. in Centr. /. Baht., Paras, it. Inf., 1900, xxviii., 

 p. 397- 



