ME. WALKER'S CATALOGUE OF DIPTEROUS INSECTS. 105 Catalogue of the Dipterous Insects collected at Sarawak, Borneo, by Mr. A. E. Wallace, with Descriptions of New Species. By Francis Walker, Esq., F.L.S. [Received Sept. 15, 1856.] Fam. MYCETOPHILHLE, Haliday. G-en. Sciara, Meigen. Div. A. a. Meig. vi. 305. 1. Sciaba laticobnis, n. s., mas et fcem. Nigra, antennis validis, thorace nitido. Mas. Alis subnigricantibus. Foam. Abdomine ferrugineo, alis nigricantibus. Male and Female. Black. Antennae stout. Thorax shining, Male. Wings slightly blackish. Female. Abdomen ferruginous. Wings blackish. Length of the body 3-4 lines ; of the wings 5-6 lines. 2. Sciara solita, n. s., foam. Nigra, antennis gracilibus, thorace abdomi-nisque apice subnitidis, pedibus piceis, alis subnigricantibus. Female. Black. Antennae slender. Thorax and tip of the abdomen slightly shining. Legs piceous. Wings slightly blackish. Length of the body li line ; of the wings 3 lines. Fam. CECIDOMYZIDJE, Haliday. Gen. Cecldomyia, Latreille. 3. Cecidomyia defeeekda, n. s., fcem. Fusca, capite nigro, thorace rufes-cente, pedibus testaceis, alis albidis, venis halteribusque testaceis. Female. Brown. Head black. Thorax reddish. Legs testaceous. Wings whitish, ciliated ; veins and halteres pale testaceous ; subcostal vein end> ing at a little before the middle of the costa ; cubital vein ending at the tip of the wing ; hind branch of the anal vein straight, and proceeding ob-liquely to the hind border. Length of the body If line ; of the wings 3^ lines. Fam. BIBIONID^E, Haliday. Gen. Plecia, Hoffmansegg. 4. Plecia dorsalis, Walk. See page 5. 5. Plecia subvaeians, n. s., mas et fcem. Atra. Mas. Thorace rufo, alis subnigricantibus. Foam. Thorace rufescente, alis nigricantibus. Male and Female. Deep black. Male. Thorax bright red. Wings slightly blackish. Female. Thorax dull red. Wings blackish. Length of the body 1^-2 lines j of the wings 4-5 lines. This species may be distinguished from P. dorsalis by its narrower wings. Fam. CTJLIC1TLE, Haliday. Gen. Culex, Linn. 6. Culex fuscanus, Wied. See page 5.
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