File:Arkiv för zoologi (1913-1914) (19714266593).jpg

• Fig. 42. Mandible and labrum of Ornix guttea (=Callisto denticulella), dorsal aspect. X 465.
• Fig. 43. Mandible of Lithocolletis sp. (=Phyllonorycter), ventral aspect. X 348.
• Fig. 44. Labrum, mandibles and top of hypopharynx of Gracilaria syringella, 1st instar, dorsal aspect. X 609.

Title: Arkiv för zoologi
Identifier: arkivfrzoologi08kung (find matches)
Year: 1913-1914 (1910s)
Authors: Kungl. Svenska vetenskapsakademien
Subjects: Zoology
Publisher: Stockholm : P. A. Norstedt & soner
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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Text Appearing Before Image:
I. TRAGA.RDH, LEPIDOPTEROUS LEAF-MINERS. 27 it was only to be expected that those of the tissue-feeders should prove to be the less modified in this respect. In Eriocrania (fig. 38) the number of teeth is less than usual, but the remaining three are larger than usual, and the mandibles are dorso-ventrally compressed. The fringes of the median edge have been discussed on pag. 24. In Tischeria (fig. 39) they are of nearly the same type, but the ventral tooth is comparatively larger, and placed nearer the middle.
Text Appearing After Image:
4A Fig. 41. Mandible of Cemiostoma scitella. ventral aspect. X 465. Fig. 42. Mandible and labrum of Ornix guttea, dorsal aspect. X 465. Fig. 43. Mandible of LithocoLletis sp., ventral aspect. X 348. Fig. 44. Labrum, mandibles and top of hypopharynx of Gracilaria syringella, 1st instar, dorsal aspect. X 609. In Nepticida (fig. 40) the ventral tooth is small, but placed on a level with the one next to it; the other three are rounded at the top and diminish gradually towards the dorsal edge so that the tips are on a line with one another. The most remarkable feature is, however, that the man- dibles are ho ri zon tal and that the three teeth mentioned above are on the same level, whereas the 4th is placed exactly below the external one.

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