232 FLORIDA GEOLOGICAL SURVEY-I3TH ANNUAL REPORT

our area than in some places farther north. The yellow fever mosquito (Stegomy ia or Aedes calopus) is believed not to be indigenous., but to breed only in artificial habitats.
 The consensus of opinion seems to be that mosquitoes are most abundant on the east coast;* but even if they are that does not prevent Daytona from being a summer resort for people from the interior as well as a winter resort for northern people. A good brief summary of the mosquito situation in Florida by Clifton F. Hodge, a nature student of national reputation, appeared in the Florida Entomologist (Gainesville), for July, 1920.
 Sandflies (a very small species of gnat) are said to be very annoying on the east coast at times, but the writer has never happened to encounter them there (or anywhere else).
 Roaches-or cockroaches as they are called in the books-of several species are common, as in other warm climates (and in steam-heated buildings farther north), but they seem to be mostly native species, that live in decaying wood, etc., and do not ordinarily invade houses.2 And the more domesticated species have at least one thing to be said in their favor, namely, they are said not to tolerate the presence of bedbugs in the same house; consequently the latter are very scarce in Florida.
 lites. A very common but inconspicuous animal, resembling an insect but belonging with the spiders, is the redbug (Troinmbidihmn sp., known, farther north as chigger, or harvest mite). It is not peculiar to Florida, but ranges northward to Maryland and Wisconsin or thereabouts, and allied species are said to be troublesome in parts of England., France, Germany, Japan, Mexico,.

 *From 1824 to 1845 approximately the eastern third of central Florida was known as Mosquito County. probably taking its name from Mosquito Lagoon on the coast of what is now Volusia and Brevard Counti-es. In 1901 the Florida Legislature-whose jurisdiction in such matters may be questioned-decreed that the lagoon should thereafter be known as Indian River North; but Mosquito Inlet, near New Smyrna, the mouth of the lagoon, is still on the maps.
 tAn easily accessible pamphlet on roaches and how to deal with them is Farmers' Bulletin 638 of the U. S. Department of Agriculture, published in 1915.