. Diptera danica : genres et espèces de mouches trouvés jusqu'au Danemark. Diptera -- le Danemark. 22 Orlliorrhapha discai biachycera. la veine, brunâtres, dans le liaif apicale jaunâtre ; la stigmatisation light yollow. juste occupant l'espace entre costa et la veine radiale, le cubilal fourchue veine à l'apex. Des haltères brun noirâtre, pédoncule un peu plus pâles. Des femmes. Le annulated antennes jaune, largcr complexe que dans l'homme. Modérément avant large. n'occupent l'un de l'tliird. Fig. 6. Aile de P. tarsalis. largeur de la tête. brillant noir avec une crête longitudinale médiane ; deux taches silvergray abov

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. Diptera danica : genera and species of flies hitherto found in Denmark. Diptera -- Denmark. 22 Orlliorrhapha biachycera. the discai vein, brownish, in the apical liaif yellowish; stigma light yollow. just occupying the space between costa and the radial vein, the cubilal vein forked at the apex. Halteres blackish brown, peduncle a little paler. Female. Antennæ yellow, the annulated complex largcr than in the male. Front moderately broad. not occupying one tliird of the. Fig. 6. Wing of P. tarsalis. breadth of the head. shining black with a median longitudinal ridge; two silvergrey spots above the antennæ. Lenght 3, 5—4.5 mm. The larva is brownish or greyish brown with two more or less indistincl, lighter, longitudinal lines on the dorsal and venlral surfaces. these lines being more conspicuous in the pupæ; the length of the larva is abt. 8 mm. P. tarsalis seems also ralher rare here, and it Iias only been bred; Charlottenlund, Dyrehaven and on Lolland at Maribo (W. Schlick). The larva was taken under bark and in decaying wood of beeches, oaks and apple-trees; it was taken from the beginning of June to the middle of July, and the imagines developed in the same months. Jaennicke (Berl. Ent. Zeitschr. 1866, X, 220) refers it to have been bred from beech {robustus Jaennicke = tarsalis Zctt.) Geographical distribution: — Northern and middle Europe, in north to Southern Sweden and in south to middle Germany. Of the genus Pachygaster there is thus hitherto known two species from Denmark. There is some reason to think that also P. atra Panz., Leachii Curt. and perhaps also meromelas Duf. may be found, as they occur both north and south of Denmark and also are found in Britain. They will be easily distinguished from the two species described. P. atra has the wings fumigated on the basal half, but the male has black antennæ, and both sexes want the silvergrey spots above the antennæ; P. Leachii has the wings cntirely hyaline and the legs quite pale, only with a blac

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