Head ash-coloured. Eyes nearly black. Antennæ red brown. Only one ocellus, placed a little above the antennæ. Proboscis almost equal in length to the depth of the head. Thorax dark greenish-brown coloured; having a white spot at the base of each wing. Abdomen dark brown colour; each segment being on the under side margined with grey. Wings transparent; anterior edges brown and opake. Legs dark brown; the middle ones having two spines at the tips of each of the tibiæ. The ungues have two small brown scales under them. Breast hairy and ash-coloured, but white on the sides. TABANUS AMERICANUS. Plate XLIV. fig. 3. ORDER: Diptera. SECTION: Tabaniens. FAMILY: Tabanidæ. GENUS. TABANUS, _Linn. &c._ TABANUS AMERICANUS. Niger, abdomine canescente, alis fusco-nigris. (Long. Corp. circ. 11 lin.) SYN. Tabanus Americanus, _Drury, App. vol._ 2. (nec _Forster._) Tabanus atratus, _Fabr. Syst. Ent._ 789. 9. _Syst. Antl._ 96. 16. _Weidemann Auss. Zw. Ins._ 1. 114. _No._ 3. Tabanus niger, _Pal. Beauv. Ins. Afr. et Amer. Dipt. t._ 1. _f._ 1. HABITAT: New York, and other parts of North America. {98}Head black. Antennæ black, being placed on the front of the head; the parts surrounding them shining, as if finely polished. Ocelli wanting. Proboscis red brown; being inclosed in a kind of sheath, which is black. Thorax very dark brown, almost black. Wings dark brown and membranaceous, not transparent. Abdomen lead coloured, the extremity nearly black; being of the same colour underneath as at top. Legs entirely black; the middle ones being furnished with two spines at the tips of the tibiæ. Breast hairy and black. SPHEX JAMAICENSIS Plate XLIV. fig. 4. ORDER: Hymenoptera. SECTION: Fossores. FAMILY: Sphegidæ, _Leach_. GENUS. SPHEX, _Linn. &c._ SPHEX JAMAICENSIS. Castaneo-rufus, abdomine nitido, capite thoraceque fulvo-hirtis, antennis nigris, alis fuscis. SYN. Vespa Jamaicensis, _Drury, App. vol._ 2. HABITAT: Jamaica. Head brown orange. Antennæ almost black, and near the length of the thorax. Eyes large, and dark brown. Thorax brown orange-coloured, and hairy, with a black spot between the wings. Wings nearly transparent, _and doubled or folded together_. Abdomen shining and very smooth, red brown, and united to the thorax by a small but short thread-like peduncle. Legs red brown, and, except the fore ones, furnished with three spines at the tips of the tibiæ. Drury described this insect as having the wings doubled or folded together, a peculiarity observed only in the wasps, amongst which the insect was placed by our author, who named it _Vespa_ Jamaicensis. My specimen of this insect, which I have reason to believe belonged to Drury, is so pinned, that the upper surface of the thorax is pressed down, and the upper wing forced backwards, and thrown nearly upside down, which was evidently the case with the specimen described by Drury. SCOLIA FOSSULANA.