. Monographs of the Diptera of North America [microform] / prepared for the Smithsonian Institution by R. Osten Sacken. Diptera; Insects; Diptères; Insectes. DICRANOMYIA. 57 altbouj^h it may l)c principally at homo in tlio iiuiro tonipcrato latitutU's. IJ. rirarians from Aukland and 1). mvrionclla from 8. America, have been described by Dr. Schiner in the Bcise d. Kovctra, etc., Diplera, p. 40. The Limnohise fumipoiius, rhorira, a-grotans, and gracilifi from New Zealand, mentioned in Walker's List of Dipt. Brit. Mus., are all Dicranomijifv. The genns Atarada, found in amber (Loew, Bernst. u. B
. Monographs of the Diptera of North America [microform] / prepared for the Smithsonian Institution by R. Osten Sacken. Diptera; Insects; Diptères; Insectes. DICRANOMYIA. 57 altbouj^h it may l)c principally at homo in tlio iiuiro tonipcrato latitutU's. IJ. rirarians from Aukland and 1). mvrionclla from 8. America, have been described by Dr. Schiner in the Bcise d. Kovctra, etc., Diplera, p. 40. The Limnohise fumipoiius, rhorira, a-grotans, and gracilifi from New Zealand, mentioned in Walker's List of Dipt. Brit. Mus., are all Dicranomijifv. The genns Atarada, found in amber (Loew, Bernst. u. Berndein- fanna) is apparently synonymous with Dicranomyia. This genus is very closely allied to Limnohia, still the differ- eiv between them are numerous. They consist:— 1, In the structure of the body : The feet of Dicranomyia are g-'uerally more slender; the ungues have usually but one distinct tooth, whereas in Limnohia there arc several; the male forcej)s in the two genera has a different structure. As to the hitter point, however diiferent the two forms may be, I look upon them as modilications of the same plan of structure, the whole dillerence con. i-ting in the more or less development of the fleshy lobes. If we represent to ourselves the large fleshy lobes of Dicra- nomyia lessened, the rostriform horny appendage, being closely applied to the falciform appendage (marked b on the figures of Tab. Ill), will form the double horny hook of lAmnobia. Inter- mediate forms really occur in some species; the forceps of Tro- chohola, for instance, is one of them. We have already noticed above the contrast in the coloring between the two genera; that of Ijimnohia being more intense and brilliant, Avith well-defined stripes, bands, und dots on the body, the wings and the feet. 2. In the m le of life : JNIost of the larvic of Dicranomyia are probably acpiatie or subaquatic, whereas those of Limnohia live in wood, fungi, etc. o. In the venation: The auxiliary vein in Dicranomyia i
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