16 Journal New York Entomological Society. [^'°'- ^^■ 



gulf coast to Mexico, always preserving its structural characters, but 

 much modified in size. The marsh species are scvera, which is con- 

 fined to the gulf strip, torttiosa, which reaches Georgia, hamata, 

 which, extending south to Mexico, does not get beyond the gulf 

 states, and marginata which has reached Maine as evidenced by cap- 

 tures made by Mr. Harris this year. 



Of the river species blanda is confined to Alabama and Georgia 

 and is not yet known from Florida, the form cited by Leconte living 

 on the Roanoke River in North Carolina may be identical ; the closely 

 allied puritana once considered a variety of blanda has been found 

 last year by Mr. Davis in Maryland. It has been reported from New 

 York but the locality is now unknown and its principal home as the 

 name is intended to suggest is in New England on the banks of the 

 Connecticut River. 



Punctiilata may also be included with these southern emigrants on 

 account of its related Mexican forms. Being a strong flier and at- 

 tracted by lights its wide dispersal has been an easier matter than 

 that of the other species. On the Atlantic coast it occurs from 

 Florida to Maine and inland it is found in most of the central and 

 southwestern states. In those cases where southern species have 

 traveled north along the Mississippi Valley they have become modi- 

 fied in entering the colder zone; thus togata becomes apicalis in 

 Kansas, blanda develops into macra and cuprascens. but the majority 

 have not gone in that direction but northward along the coast, the 

 pine woods species aided by the almost continuous pine forests of the 

 coastal plain, the maritime species by the tides and accidents of 

 the sea. 



Summary. 



In conclusion I hope I have shown you that if all the facts con- 

 cerning geographical distribution of tiger beetles are not accounted 

 for by the factors suggested', by far the greater part are so accounted 

 for and there remain none at serious variance with the theories ad- 

 vanced. For the southern origin of many species the evidence is 

 overwhelming, for the northern origin of others it seems to me nearly 

 equally strong. Outside the question of origin, the bearing of lati- 

 tude, longitude, environment and accident seem approximately equal 

 in importance, each has undoubtedly played an important part in 

 developing existing conditions. 



