. Economic entomology . Tricliodactylus osmiae. Copied from original figure by Dufour. Trichodactylus osmiK. Copied from figfure by Donnadie;]. Found on a species of Osmia. It will be seen that it has the mouth-piece of Hypopus with its two projecting bristles. No. 5. Trichodactylus xylocop^.—6. Magnified sketch of ditto, copied from figure. Found on Xylocopa violacea. There is some appearance of transverse lines on the surface of this and the preceding species, but we have had no means of ascertaining how far they are of the same character as those on the Sarcoptidse. The hair ter- mination o
. Economic entomology . Tricliodactylus osmiae. Copied from original figure by Dufour. Trichodactylus osmiK. Copied from figfure by Donnadie;]. Found on a species of Osmia. It will be seen that it has the mouth-piece of Hypopus with its two projecting bristles. No. 5. Trichodactylus xylocop^.—6. Magnified sketch of ditto, copied from figure. Found on Xylocopa violacea. There is some appearance of transverse lines on the surface of this and the preceding species, but we have had no means of ascertaining how far they are of the same character as those on the Sarcoptidse. The hair ter- mination of the last pair of legs undoubtedly has some affinity to that group, and it is obvious that we are approaching its terri-
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