Labrador, the country and the people . vely small, not exceedingthe width of the thorax; the abdomen is marked with three rowsof conspicuous grayish triangles. The northern horse-fly, Ta-banus septentrionalis, is similar in general appearance, but with alarger head and less prominent abdominal markings. The sixthspecies, Tabanus illotus, is distinguished from the preceding oneby the broad, distinctly excised, third antennal joint, and faintbrown clouding on the cross-veins. The larvae of the horse-flies (Fig. 4) are aquatic or subaquatic,living either in the mud in streams and swamps, or in we
Labrador, the country and the people . vely small, not exceedingthe width of the thorax; the abdomen is marked with three rowsof conspicuous grayish triangles. The northern horse-fly, Ta-banus septentrionalis, is similar in general appearance, but with alarger head and less prominent abdominal markings. The sixthspecies, Tabanus illotus, is distinguished from the preceding oneby the broad, distinctly excised, third antennal joint, and faintbrown clouding on the cross-veins. The larvae of the horse-flies (Fig. 4) are aquatic or subaquatic,living either in the mud in streams and swamps, or in wet earthadjacent to springs. The eggs are placed on plants overhangingthe water or in very wet situations. The eggs hatch in about aweek, and the young larvae drop into the water or mud. Thelarvae are carnivorous, feeding upon other insects and snails, andprobably repaying to some extent their annoyance when are cylindrical, tapering gradually toward the end, andusually translucent, whitish, and in some of the larger species. Fig. I. Chrysops excitans(enlarged)
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Keywords: ., booka, bookcentury1900, bookdecade1900, booksubjectnaturalhistory
