_Male._ Body rather broad, pubescent. Proboscis small, withdrawn; eyes pubescent; antennae very short, arista very long; scutellum large, conical, very prominent, extending beyond the base of the abdomen; abdomen nearly elliptical, not longer than the thorax; legs rather broad, pubescent, without bristles; wings rather long and broad; veins of equal size, costal vein ending at rather before half the length of the wing, radial ending at somewhat in front of the tip of the wing, cubital ending at hardly in front of the tip, praebrachial ending at a little behind the tip, pobrachial ending on the hind border at half the length of the wing, discal transverse vein straight, parted by more than twice its length from the border and from the praebrachial transverse. 166. PALLURA INVARIA. _Mas._ Lutea, immaculata, alis cinereis basi luteis, apice nigricantibus, venis nigris robustis. _Male._ Luteous, of one colour. Wings grey, luteous at the base, blackish towards the tips; veins black, robust. Length of the body 3 lines; of the wings 6 lines. Fam. HIPPOBOSCIDAE, _Leach_. Gen. ORNITHOMYIA, _Leach_. 167. Ornithomyia parva?, _Macq. Hist. Nat. Dipt._ 11. 2. 279. 3. KEY ISLAND. Fam. ASILIDAE, _Leach_. Subfam. LAPHRITES, _Walk._ Gen. LAPHRIA, _Fabr._ 1. LAPHRIA PARADISIACA, n. s. _Mas._ Cuprea, aureo pilosa, capite pectoreque argenteis albo pilosis, mystace subaurato setis nonnullis nigris, abdomine apice purpureo subtus albido piloso, pedibus cyaneo-purpureis albido pilosis, femoribus cyaneo-viridibus, alis nigricantibus basi cinereis, halteribus albidis nigro notatis. _Male._ Cupreous, with gilded hairs. Head and pectus silvery, with white hairs; mystax slightly gilded, with a few long black bristles; antennae and mouth black; abdomen purple at the tip, underside clothed with long whitish hairs, silvery white at the base, the following segments bordered with silvery white; legs blue and purple, thickly clothed with long whitish hairs, femora bluish-green, fore tibiae with pale gilded down beneath, hind tibiae with a black bristly apical tuft beneath; wings blackish, grey towards the base; halteres whitish, marked with black. Length of the body 11 lines; of the wings 20 lines. 2. LAPHRIA PLACENS, n. s. _Mas._ Cyanea, capite aurato, mystace setis paucis longis nigris; antennis nigris, articulo tertio fusiformi; pectore albido, abdomine angusto, femoribus intus tibiisque purpureis; alis nigricantibus basi cinereis, halteribus piceis. _Male._ Blue. Head gilded in front, whitish behind; mystax with a few long black bristles; proboscis and antennae black, third joint of the latter fusiform; pectus whitish; abdomen cylindrical, much narrower than the thorax, and about twice its length; femora on the inner side and tibiae purple, tarsi black; wings blackish, cinereous towards the base; halteres piceous. Length of the body 4-1/2 lines; of the wings 8 lines. Subfam. ASILITES, _Walk._ Gen. ASILUS, _Linn._