row
of strong serrations.

Gen. SPHEX, _Fabr._

1. SPHEX ARGENTATA, _Dahlb. Hym. Eur._ i. 25. 1.

_Hab._ Aru; Celebes; Sumatra; India; Greece; Africa; East Florida.

2. SPHEX SERICEA, _Fabr. Syst. Piez._ 211. 19.

_Hab._ Aru; Malacca; Borneo; Java; Philippine Islands.

3. SPHEX AURIFRONS. _S._ niger; facie pube aurea vestita, alis
flavo-hyalinis apice fuscis, abdomine pilis sericeo-aureis vestito.

_Female._ Black; the face densely clothed with golden pubescence, the
head having a number of scattered long golden-yellow hairs. Thorax
thinly covered with long yellow pubescence, which is most dense at the
sides of the metathorax; the tibiae, tarsi, and posterior femora
ferruginous; the claw-joint of the tarsi black; the tibiae and tarsi with
black spines; the wings fulvo-hyaline, their apex with a narrow fuscous
border, the nervures ferruginous. Abdomen covered with a fine, thin,
golden-reflecting pile; the apical margins of the segments
rufo-testaceous, the testaceous margin produced in the middle into a
triangular shape, most conspicuously so on the segments beneath.

_Hab._ Aru.

4. SPHEX NITIDIVENTRIS. _S._ niger; abdomine nigro-caeruleo, laevigato,
nitido; alis fuscis.

_Female._ Length 12 lines. Black; the face with silvery pubescence, and
thinly covered with long black hairs; the clypeus with a central
longitudinal carina at the base, which terminates at the middle, from
whence to the anterior margin is a broad, smooth, shining space. Thorax
shining and finely punctured; the metathorax opake and covered with
long, loose, black pubescence; the legs shining, the posterior tibiae
with shining grey pile within; wings brown, darkest at their base.
Abdomen blue, and very smooth and shining, oblong-ovate; the apical
segment vertical.

_Hab._ Aru.

5. SPHEX SEPICOLA. _S._ niger; facie pube aurea vestita; alis
subhyalinis apice fuscis; abdomine nitido.

_Female._ Length 9 lines. Black; the face densely clothed with golden
pubescence, the cheeks with iridescent pile, with a long, loose,
scattered pale yellow pubescence on the head and thorax; the mandibles
smooth, shining black. The disk of the thorax with an obscure chalybeous
tint, shining and finely punctured; the metathorax opake and finely
rugose; the wings subhyaline, their apical margins fuscous, the nervures
fusco-ferruginous. Abdomen with a slender subelongate petiole, and with
a thin, silky, grey pile; the apical margins of the segments narrowly
a