of New Exotic Aculmtc Hymenoptera. 77 
Obs. — This conspicuous species, the largest yet discovered, I 
dedicate with much pleasure to the Marquis of Spinola, the first 
discoverer of the genus. It differs slightly from the type in its 
mandibles and metathoracic sculpture. 
Species 5. Pison punctifrons, Shuck. 
Niger, cinereo-pubescens ; fronte et thorace anteriore dense et crasse 
punctato ; alts hyalinis, margine obscuriore. 2 • 
Length 5| lines. 
Entirely black ; the head, thorax, pectus, legs, and base of the 
abdomen, loosely covered with long grey hair ; the face beneath the 
antennae, the cheeks, and the sides of the abdominal segments, with 
a silvery reflection ; the face above the antennae very thickly and 
coarsely punctured, but which diminishes in coarseness above the 
anterior stigma. 
The thorax in front and beneath also coarsely and thickly punc- 
tured, its disk and scutellum equally coarsely but less thickly so, 
and slightly shining ; the metathorax very coarsely obliquely stri- 
ated, but which is somewhat concealed by the hairs covering it ; 
the wings hyaline, with their margins obscure and nervures black, 
the recurrent nervures inosculating with the transverso-cubitals ; 
the legs and tarsi without cilise and lateral spines. 
The abdomen shining and reflecting, laterally only, a silvery 
hue. 5 . 
Either from India or St. Helena. 
In the Cabinet of Mr. Westwood. 
Obs. — This species at first sight much resembles the P. Spinolce, 
but, upon examination, it is at once distinguished by its very coarse 
sculpture, and the size of its second submarginal cell. 
Species 6. Pison Westwoodii, Shuck. 
Ater, glaher, tenuissime punctaius ; capite c interim argenteo-villoso, 
alls hyalinis, margines versus leviter nehulosis ; metathorace ob- 
liqui ) striato, carind obsoletd. 9 . 
Length lines. 
Entirely atrous ; the head and thorax very delicately punctured, 
the lower part of the face and clypeus covered with a silvery down. 
The metathorax obliquely striated, and the carina of the central 
channel obsolete. Tbe wings hyaline at the base, and clouded 
towards their apex ; their nervures black ; the first and second re- 
current nervures received distinctly within the second submarginal 
cell. The tibiae and tarsi simple. 
