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. 



