422 Timehri. 
reach to the middle of metatarsus ; the tibial and tarsal spines longish, sparse ; 
claws bifid. Female. 
Length 11 m.m. female ; male 8 m.m. 
Temples very short, the occiput transverse. Apex of pronotum broadly 
rounded, not angled. The 3rd transverse cubital nervure is angularly bent in 
front. 
Pompilus impervalis, Smith. 
Black, with a blue tomentum, more noticeable on the abdomen than on the 
thorax ; wings uniformly fuscous violaceous, the nervures and stigma black ; 
the 3rd abscissa of radius one quarter of the length of the 2nd and one-half 
shorter than the Ist ; the transverse median nervure interstitial, the Ist recur- 
rent nervure received in the apical fourth of the cellule, the 2nd shortly, but 
distinctly before the middle ; the accessory nervure in hind wings received very 
shortly beyond the cubitus. Female. 
Length 15 m.m. 
liyes converging slightly above, the hinder ocelli separated from each other 
by a slightly less distance than they are from the eyes. Apex of clypeus 
broadly, roundly incised. Apex of pronotum angled in the middle, the sides 
straight, oblique. Claws with a distinct tooth. Fore metatarsus with 6 
spines. The tibial and tarsal spines long, stout. The hinder half of the Ist 
transverse cubital nervure is broadly rounded, the anterior straight, more 
obliquely sloped, the 2nd has the front half slightly but distinctly sloped, the 
3rd is broadly roundly obliquely sloped towards the front of the 2nd ; apex of 
metanotum straight, oblique in the centre, the sides and top rounded. 
An example in the collection seems to be the above species. Cf. Cameron, 
Biol. Cent. Amer. Hymen., ii, 196, Tab. xi, f 16, 16 a.; Smith Descr. of New 
Species of Hymen. 155. It is certainly identical with a larger specimen from 
Rio Purus, Amazonia, which was named for me P. nitidulus, Guer. by F. Smith. 
The latter is a Chilian species and the Amazonian species is certainly different 
from the P. nitidulus, described by Kohl, who also figures the wing Cf. Verh. 
der K. K. Zool.-Bot. Gesell.in Wien, 1905, p. 341, /. 5. I have givena deserip- 
tion of the Guiana imperialis. It varies in siza, from 13 to 20 m.m, 
Pompilus harperi, sp.n. 
Black, densely covered with silvery pubescence ; wings clear hyaline, with 3 
fuscous violaceous clouds, one commencing immediately behind the transverse 
median and transverse basal, beyond the former it is roundly, irregularly dilated 
in the middle and extends to shortly beyond the apex of the basal third of the lst 
abscissa of cubitus, below it fills the discoidal cellule except at the apex to the 
anal nervure ; the 2nd cloud fills the radial cellule to the middle of the apical 
abscissa of the radius ; it fills the 2nd except behind, the hyaline band wider 
at the base than at the apex, the whole of the 3rd, except for a lighter coloured 
curved band at the base, and a large cloud extending from the base of the Ist 
recurent to the 3rd transverse cubital nervures, across the 2nd recurrent, 
