MOSQUITO BIOLOGY 59 



HABITS OF THE ADULT 



This species flies and bites freely long before dusk and long after 

 sunrise. It bites quite as hard as any of the other Anopheles, and is as 

 eager to get indoors. At Cape May, which is the only place where I have 

 found it at all abundant, it is the most annoying form and far more 

 troublesome than C. pipiens. 



DESCRIPTION OF THE LARVA 



Does not differ in general appearance from that of An. punctipennis 

 and An. quadrimaculatus, but a little smaller, ranging from 5.5—6 mm. 

 (.22-.24 inch) in length when full grown. Dirty grayish brown, with 

 usual variation of other larvae. White dorsal stripe may be present in 

 living larvae but no indication in alcoholic specimens. Maculation of 

 vertex variable, much larger than in other species, with much less de- 

 fined edges. Second joint of antenna shorter, does not taper as much 

 apically as in allied species, very blunt, with two long spines serrated on 

 one edge and six long hairs, which have common center ; dark brown, 

 pale yellow at base, surface set with rather long spines ; four-branched 

 hair larger and situated one-third length of antenna from base. Mandi- 

 ble and maxillary palpus of normal Anopheles form, former with four, 

 instead of three, curved dorsal spines, three of them feathered on one 

 side; latter with two apical spatulate processes. Dorsal plates on each 

 of abdomnial segments large, and circular spots beneath them very ob- 

 vious. Respiratory apparatus very similar to that of quadrimaculatus 

 and punctipennis. Lateral combs consist each of large plate, posterior 

 edge with seven or eight long stiff spines, ten or twelve shorter spines 

 between. Ninth segment rather stout, dorsal tufts and ventral fan as 

 in others, with dorsal plate a little larger. Tracheal gills short and 

 stout, less than half length of other two species. 



HABITS OF THE EARLY STAGES 



The eggs are laid singly on water. The larvae live in ground pools, 

 usually in tidal marshes. Breeding does occur inland, but winged ex- 

 amples are usually taken along the seacoast. 



The winter is passed in the adult form in sheltered places. 



