AEDES T^NIORHYNCHUS 671 



Professor Smith's observations were made at the northern extreme of the 

 range of the species. His statements regarding the association of the larvas 

 with those of Aedes sollicitans and cantator applies only in the more northernly 

 localities. To the southward the larvae of tceniorhynchus usually appear un- 

 associated with other species. 



Dr. Dyar found the larvae upon the salt-marshes of southern California, where 

 a brood appeared in the highest pools at each monthly high tide. They fol- 

 lowed the appearance of Aedes squamiger, with which they were mixed. In 

 Mexico and Central America, Mr. Knab frequently found the larvae in large 

 numbers in pools of rain-water, but only within the tide-water region. Dis- 

 cussing the habits of the adult in New Jersey Professor Smith says : 



" In a general way, the habits of this species are like those of sollicitans, but 

 it is not nearly so abundant. It is strictly a marsh mosquito, and has never 

 been bred an3rwhere else, but it also migrates, though not so generally and not so 

 far. It reaches New Brunswick from the Earitan meadows in small numbers, 

 but it has never been sent in by Mr. Brakeley from Lahaway, so that it is dis- 

 tinctly inferior in its spread to both sollicitans and cantator. Nor is it equally 

 abundant throughout its range. From the sections north of the Barnegat Bay, 

 collections early in the season have shown few or no specimens: later they 

 become more abundant ; but from two to ten per cent, of the bred specimens was 

 the best secured at any time from the collections made by Messrs. Brehme and 

 Grossbeck. At Atlantic City I found the species active and biting during the 

 day quite as abundantly as sollicitans. At Anglesea a series of porch captures in 

 August made during the late afternoon, showed both species equally present. 

 In the examination of Mr. Viereck's material some lots were nearly 50 per 

 cent, tceniorhynchus, and in one lot of between four hundred and five hundred 

 only five per cent, were sollicitans, the remaining 95 per cent, being of this 

 species. These, however, are abnormal percentages, and on the marsh itself the 

 captured adults show no such equality with the larger species. I have never 

 observed tceniorhynchus crawl up the legs of the marsh tramper as its ally does, 

 but it may do so where it is most abundant. 



" Mr. Viereck failed for a long time to find gravid examples of this species, 

 but late in the season he collected a lot of specimens attracted to the electric 

 lights and found them mostly gravid examples of tceniorhynchus, sollicitans, 

 salinarius, and crucians. He duplicated that collection later and thereafter 

 found no difficulty in obtaining specimens with developed ova. . . . 



" As to the bite, that is much like that of sollicitans and, like that species, 

 tceniorhynchus takes no long thought in reaching a proper spot; any exposed 

 place will answer and it has the same ankle-seeking propensity that its allies 

 have. I have never taken it indoors, even along shore. 



" The egg-laying habits are like those of sollicitans and the eggs themselves 

 have not been found separable from those of its ally. In fact, in my first experi- 

 ments I bred more tceniorhynchiis than I did sollicitans from the egg-filled sods 

 collected." 



In the warmer parts of continental America Aedes tceniorhynchus is the com- 

 mon coast species and sometimes appears in enormous numbers when the condi- 

 tions favor the production of a brood. It has the same tendency to migrate as 

 A. sollicitans and has been taken far inland. Swarms of this mosquito have been 

 reported at sea, in the Gulf of Mexico, many miles from land. The species is 

 replaced by closely related forms in the Antilles, on the west coast of South 

 America and on some of the Pacific islands. 



Atlantic coast of America, exclusive of the Antilles; Pacific coast from 

 southern California southward. 



