134 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 5 



reason of these facts, it is far less important economically than Anoph- 

 eles albimanus and tarsimaculata. It is the only species of Isthmian 

 Anopheles which breeds readily in artificial containers. In ground 

 water it prefers the smaller collections, such as water seeping from 

 springy hillsides and filling the smaller depressions in soft ground, 

 also ditches carrying but a trickle of water and similar situations. 

 It seems quite dependent upon the presence of algae. 



As an annoying pest and as a malaria carrier Anopheles pseudo- 

 punctipennis falls below Anopheles albimanus. It occurs abundantly 

 from ocean to ocean but is somewhat more discriminating than the 

 latter in choice of breeding places. It prefers as a rule water of greater 

 purity and rapidity of current. The larval food, like that of albimanus, 

 is by preference the soft green algae, though it does not scorn, lacking 

 better, many places departing quite widely from the chosen type. 

 At times its abundance is enormous, though usually far fewer of this 

 species will find their way into buildings than is the case with albimanus, 

 and its flight is less vigorous. Biting experiments with albimanus and 

 pseudopunctipennis have shown that under identical conditions less 

 than one pseudopunctipennis becomes capable of transmitting malaria 

 to five albimanus. 



Ano^jheles malefactor is widely distributed and abundant locally. 

 It is a large handsome species, a vigorous biter, active in entering 

 houses, but apparently does not transmit malaria, as Darling failed to 

 infect individuals which were fed at the same time and upon the same 

 patient as specimens of albimanus which became infected. 



In addition to the foregoing occur Anopheles punctimacula, which 

 I have never taken and is certainly rare, and Ayiopheles apicimacula, 

 which is fairly abundant locally and occasionally. It does not often 

 find its way into screened buildings and its breeding habits are not 

 peculiar though a preference is shown for semi-sylvan situations with 

 more or less shade. Temporary grassy pools formed by heavy rains 

 or overflowing streams, waterfilled depressions in low bush, completely 

 shaded and devoid of visible living vegetation seem to be the character- 

 istic breeding places. 



Anopheles eiseni is a strictly sylvan species and breeds in depressions 

 in the rocky beds of mountain streams, where protection from the 

 rapidly flowing current is afforded; also in tree holes and bamboo 

 stumps. It is fairly abundant in favorable localities, yet I have never 

 observed adults of the species at large by day, even in the dim light of 

 the dense forest, nor at night when camping in the vicinity of active 

 breeding places. I have no record of its entrance into buildings and 

 have never taken the larvse even a few yards beyond the edge of the 

 forest. The relation of eiseni to malaria is not known as it has been 



