. Diptera danica : genera and species of flies hitherto found in Denmark. Diptera -- Denmark. Leptiditlae. 155 S. crassiconiis is rare in Deninarlc, only about ten specimens have been taicen; Dyrehaven (H. I. Hansen), al Soro; Jutland at Frijsen- borg (H. I. Hansen) and at Holstebro. The only date of capture I i<novv is in Juiy. Geographicai distribution: — Europe from the northernmost Sweden down into France. Zetterstedt records it as taken from •'"'/i; —'"/». 5. Ptiolina Zett. (Zett. 1842. — Stægef in litt. 1838.) Species of rather small size and dark colour. Head as broad as or
. Diptera danica : genera and species of flies hitherto found in Denmark. Diptera -- Denmark. Leptiditlae. 155 S. crassiconiis is rare in Deninarlc, only about ten specimens have been taicen; Dyrehaven (H. I. Hansen), al Soro; Jutland at Frijsen- borg (H. I. Hansen) and at Holstebro. The only date of capture I i<novv is in Juiy. Geographicai distribution: — Europe from the northernmost Sweden down into France. Zetterstedt records it as taken from •'"'/i; —'"/». 5. Ptiolina Zett. (Zett. 1842. — Stægef in litt. 1838.) Species of rather small size and dark colour. Head as broad as or sliglitly broader than the thorax, semiglobular, with a flattened face. Antennæ inserted near to each other in the middle. Yowls horizontal, not produced below the eyes. Antennæ three-jointed, the two basal joints short, the third oval, compressed, terminating in a fine style. Eyes bare, in the male the upper facets larger than the lower, the dividing line sharp. About the mouth parts I can say only little, as I have not been able to dissect them; they seem to resemble those of Leptis; the proboscis is moderately short, the labeila F'g- *6- Antenna of somewhat protruding; the maxillary palpi siniiiar to those in Leptis. Thorax is nearly quadratic. Abdonien somewiiat elongate, consisting of seven segments, truncate at the apex in the male on account of the somewhat knobbed genitalia; in the female terminating in an ovipositor with two lamellæ. Front tibiæ with no apical spurs, middle tibiæ with two, hind tibiæ with one apical spur; no longer hairs on the front tarsi. Wings with the anal cell closed. The larva of one species, P. nigripes Zett., has been described by Brauer (Denkschrift. d. Kais. Akad. d. Wiss. Math. Nat. Classe, Wien, XLVll, 1883, 43, Tab. III, Fig. 41—42). It is cylindrical, tapering towards the head, truncate at the hinder end, of emerald green colour. Mouth consisting of a median labrum with five teeth, flat, hooked mandibles, movable vertic
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