. Fig. 10.—Sciara. Fig. 11. Larva(«) andpupa(J) of Scian From this habit they are known in Germany as the "Heer- worm," or " army ; The object of these migrations is not exactly known, as they take place only when the larvae are nearly fully grown, and the suggestion that^ it is in search of new feeding grounds has been contested. S. militaris is the European species in which this peculiar habit has been most frequently observed. Some species form a rough silky cocoon, others an earthy one in which to pupate. One American species, S. americana, AVied., is known as the
. Fig. 10.—Sciara. Fig. 11. Larva(«) andpupa(J) of Scian From this habit they are known in Germany as the "Heer- worm," or " army ; The object of these migrations is not exactly known, as they take place only when the larvae are nearly fully grown, and the suggestion that^ it is in search of new feeding grounds has been contested. S. militaris is the European species in which this peculiar habit has been most frequently observed. Some species form a rough silky cocoon, others an earthy one in which to pupate. One American species, S. americana, AVied., is known as the " yellow fever fly," but there is probably no connection between the insect and the disease. S. inconstans, Titch, has been found in decaying apples in the Mammoth Caves of Kentucky, Hine saying that the larva bores into the stems of carnations. S. jndi- caria, Mg., a common European species, has been bred by Dahlbom from rotting galls on Saliv pentandra, whilst Giraud bred S. giraudii from field mushrooms in Europe. In endeavouring to classify the species of Sciara much difficulty is met M'ith owing to the remarkably close general resemblance that they exhibit one to another.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectdiptera, bookyear1912
