1 8 ENTOMOLOGICAL NEWS. [Jan., '17 



covered with white freckles. This speckled-legged group con- 

 sists of two species, A. malefactor and A apicimacula, and 

 can be easily separated from the other five species of common 

 Anopheles of the Canal Zone by their speckled legs. Both of 

 these mosquitoes are quite pretty and are almost identical in 

 appearance and can only be separated from one another by 

 the wing markings. A. apicimacula has a large black spot, or 

 patch of black scales, at the upper portion of the tip, or apex, 

 of the wings, and this deep black spot easily separates this 

 species from A. malefactor, which does not have this deep 

 black spot but has a few small scattered groups of black spots 

 taking its place. There is also a difference in the arrange- 

 ment of the black and white spots along the veins of the 

 wings, but to anyone not accustomed to identifying mosquitoes 

 this diversity may not be readily noticeable, and the difference 

 between the decoration on the tip of the wing is the best means 

 of separating the two species: the large black spot in A. apici- 

 macula and the few small scattered groups of black spots in 

 A. malefactor. It is rather difficult to distinguish between 

 these two species when the specimens are very badly rubbed 

 and many of the wing scales removed. 



Anopheles argyritarsis, albimanus et tarsimaculata. 



The next and last and most important group from a medi- 

 cal standpoint is the white-footed group which consists of 

 three species, A. argyritarsis, A. albimanus, and A. tarsimacu- 

 lata. These three mosquitoes are readily separated from the 

 other four common Anopheles by the fact that each of these 

 three species has white feet on the hind legs. A. argyritarsis 

 can be readily distinguished from the other two species by its 

 hind feet which are snow white without any narrow black 

 band near the end. The palpi of A. argyritarsis and A. albi- 

 manus are very similar. A. albimanus and A. tarsimaculata 

 both have white hind feet, but in both species there is a nar- 

 row black band near the end. This black band is separated 

 from the apical end of the feet by a narrow white band of 

 nearly the same width as the black band. The similarity of 

 the feet markings in these two mosquitoes makes it necessary 



