. Diptera danica : genera and species of flies hitherto found in Denmark. Diptera -- Denmark. 286 Orthorrhapha brachycera. are two (pairs of) short, brown teeth, one above the other, and the apex of the sheath is bent out and free (perhaps not natural); the thorax has some short bristles above, and at its front margin there are two very long, pointed spiracular tubes, almost as long as the pupa; the abdominal segments, except the first, have girdles of short, brown splnes above; the last segment has two somewhat iarger spines above, and two curved spines below. — The pupæ were found at the sho
. Diptera danica : genera and species of flies hitherto found in Denmark. Diptera -- Denmark. 286 Orthorrhapha brachycera. are two (pairs of) short, brown teeth, one above the other, and the apex of the sheath is bent out and free (perhaps not natural); the thorax has some short bristles above, and at its front margin there are two very long, pointed spiracular tubes, almost as long as the pupa; the abdominal segments, except the first, have girdles of short, brown splnes above; the last segment has two somewhat iarger spines above, and two curved spines below. — The pupæ were found at the shore, and rested in cocoons formed of sand and clay; the author says that the cocoon was smooth on the inside, no doubt there has been a film as described under Dolichopus. The pupæ were found on ^^/g and developed soon after. The pupa is further mentioned by Brown (Entomologist VII, 1874, 207) and Smith (Proc. Entom. Soc. London, 1874, p. XIX), but these papers I have not seen. The species of Machaerium occur exclusively at shores. Of the genus three species are known; one occurs in Denmark. 1. M. maritimae Hal. 1831. Hal. Zool. Journ. V, (1835), 352, 1, PI. XV, figs. 11—12. — 1850. Loew, Stett. ent. Zeitg. XI, 110, 13, Tab. I, Fig. 25 {BhapMum). — 1903. Kat. palåarkt. Dipt. II, 334. Male. Vertex and frons green. Epistoma broad, widening down- wards, silvery whitish grey; palpi large, of the same colour. Occiput green, a little greyish pruinose; postocular hairs black above, yellowish below. Antennæ black, long, about twice as long as the head; the. Fig. 89. Antenna of M. maritimae d". X 50, basal joints short, the third very long, thick at the base but excised below so that the long apical part is thin; the arista much shorter than the third joint. Thorax bright green or more golden green, with two more golden or æneous stripes in the middle; it is somewhat greyish pruinose, not much shining. Pleura green, slightly greyish pruinose; propleura with pale hairs a
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