. Bulletin, Gulf Biologic Station. Biology -- Societies, etc. 16 ^-fforts, as they can swim much faster than they can crawl when oji dr}^ land. They are, no doubt, carried for lonj,' distances during periods of high water, either unprotected or in old logs, pieces of rotten wood or in fact in any plant remains of ca- pacity enough to harbor them. Their appearance in places dis- tant from water may often be explained by their transportation during overflows, and it is safe to sup{)0se that the wide dis- tribution of the si)ecies is in a measure due to its distrii)uti()n 'ty the waters of rivers
. Bulletin, Gulf Biologic Station. Biology -- Societies, etc. 16 ^-fforts, as they can swim much faster than they can crawl when oji dr}^ land. They are, no doubt, carried for lonj,' distances during periods of high water, either unprotected or in old logs, pieces of rotten wood or in fact in any plant remains of ca- pacity enough to harbor them. Their appearance in places dis- tant from water may often be explained by their transportation during overflows, and it is safe to sup{)0se that the wide dis- tribution of the si)ecies is in a measure due to its distrii)uti()n 'ty the waters of rivers and creeks. It seems proba])le to me that many larvae reach maturity miles from where they were hatched, and that a mass of eggs placed on a leaf overhanging the watei's of such a river as the ^Mississippi might produce adults for several different States. Larvae in the breeding cages stop eating in late fall, even though they are ke[)t at a temperature as high as is normal for the summer months. This may be taken as an indication that they hibernate during the winter months when compelled to do so. I have* spent some time in trying to gather data on this point, and have found the larvae of the species under consideration in more or less exposed places i-epeatedly, at the beginning of win- ter. I have not succeeded in finding them in a frozen condition, fw I have larvae of other insects, but there is no doubt that they are often caught by winter frosts in northern climates, and in ease they are lher(^-seems to be no i-eason why they should be injured thereby any moi-c than Ihe larva- of the moths and butter- flies. So far as m^- observation goes, all species of horseflies pass the winter in the larval stage; therefore, the effect of cold on this stagv is a sultji'd tliat sliouM be thoroiighlv investigated. ViLi. 1(».—.\inerkaii fomalf, natural I'sclly iTiibinnix ( Please note that these images are extracted from scanned page images that may have been d
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