which forms the subject of the following catalogue. The specimens collected at Singapore and Malacca were taken during the six months commencing with May and terminating with October. Where the altitude of the locality above the level of the sea of any species is known, this will be found noted in the proper place. Figures will be given to illustrate new genera or any very remarkable species. WILLIAM WILSON SAUNDERS. 14th January, 1856. Fam. BIBIONIDÆ, _Haliday_. Gen. PLECIA, _Hoffmansegg_. 1. PLECIA DORSALIS, n. s., mas et fœm. Atra, thorace rufo, alis nigricantibus. _Male and female._ Deep black. Thorax bright pale red. Wings blackish. Length of the body 2½–3½ lines; of the wings 7–8 lines. The totally red thorax of this species distinguishes it from _P. fulvicollis_, Wied., and from _P. ignicollis_, Walk. Singapore and Mount Ophir. Fam. CULICIDÆ, _Haliday_. Gen. CULEX, _Linn._ 2. Culex splendens, _Wied. Auss. Zweifl._ i. 3. 3. Singapore. Inhabits also Java. 3. Culex fuscanus, _Wied. Auss. Zweifl._ i. 6. 9. Malacca. Inhabits also Hindostan. 4. CULEX ANNULIPES, n. s., fœm. Obscurè fuscus, thoracis abdominisque lateribus albo-punctatis, pedibus albo-cinctis, alis sublimpidis venis fusco-ciliatis. _Female._ Dark brown. Sides of the thorax and of the abdomen with minute white dots. Legs with numerous white bands. Wings nearly limpid; veins brown, ciliated. Length of the body 2½ lines; of the wings 4 lines. Singapore. (Jungle.) Fam. TIPULIDÆ Gen. LIMNOBIA, _Meigen_. Div. I. _Meig. Zweifl._ i. 131. pl. 5. f. 5. 5. LIMNOBIA LEUCOTELUS, n. s., mas. Atra, alis nigricantibus, maculâ discali limpidâ, margine postico subcinereo, apice albo. _Male._ Deep black. Wings blackish, with a discal limpid spot; posterior border slightly greyish for rather more than half the length from the base; tips white. Length of the body 6 lines; of the wings 12 lines. Singapore. 6. LIMNOBIA PLECIOIDES, n. s., fœm. Atra, thorace pallidè rufo, alis nigricantibus. _Female._ Deep black. Thorax pale red. Wings blackish. Length of the body 7 lines; of the wings 12 lines. Singapore. Div. L. _Meig. Zweifl._ i. 132. pl. 5. f. 4. The structure of the wing-veins in the above division is almost, but not quite, identical with that of the following species. 7. LIMNOBIA DICHROA, n. s., fœm. Atra, antennis ferrugineis basi apiceque nigris, abdomine luteo, basi fasciâque latissimâ posticâ nigris, pedibus testaceis, femoribus tibiisque apice tarsisque nigris, alis fuscescentibus costâ testaceâ.