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REPORT ON ZOOLOGY, MDCCCXLll: 
differently formed claws. At a later period (Entom. Zeit. p. 214) he 
convinced himself, that in Pompilus the claws present great varieties, so 
that Isonotus is distinguished from Pompilus, preferably, by the head 
being closely attached to the collar, and the proportionably large clypeus. 
The name has been already applied by Perty to a genus of beetles. 
Westwood (Proc. Ent. Soc. Lond. p. 53) has given an account of an 
undescribed New Holland Pompilus {audax, Westw.), the pupae of 
which were found at Port Lincoln ; each pupa was in a cell ; several of 
these cells were attached together, and seemed formed of a succession of 
short transverse layers ; it appeared evident, that these nests had not 
been enclosed in a burrow, but were external, the materials having been 
brought from a distance. In one of the cells the remains of a very large 
spider, which had evidently served as the food of the enclosed larva, 
were found. 
Bembecidje. — The reporter has described a new species, Bemhex fur- 
cata, from Van Diemen’s Land (Arch. 1842, i. p. 266). 
Sapygites. — Gen4 has made known some important discoveries in the 
habits of the Polochrum repandum. He found small black barrels in 
the nests of Xylocopa violacea, which Spinola asserted to belong to 
them, out of which he had reared the Pol. repandum. Prof. Zendrini 
has made similar experiments at Pavia, so that it appears from this, 
that Polochrum repandum lives as a parasite in the nest of Xylocopa 
violacea (1. c p. 25). 
Thynnid.®. — Guerin (Mag. de Zool. ins. pi. 99-105) has subjected to 
revision the genera of Thynnidce, characterized by him in Duperrey’s 
work, adding some new ones, and illustrating them all by figures. These 
investigations still leave much to be desired, and even yet, scarcely one 
of the genera is sufficiently characterized to be recognised. 
As a comprehensive monograph is expected from Mr. Shuckard, it 
does not appear to me proper to go deeper into details, than to name the 
newly characterized genera and species : Rhagigaster Jicemorrhoidalis, a 
new species from Swan River ; Agriomyia marginilabris, afinis, West- 
woodii, abdominalis, new New Holland species ; for the last two, with 
longer antennae and long fringes at the posterior margin of the head, the 
author proposes a generic name, Tachynomyia ; Thynnus Shu char dii, 
flavildbris, new New Holland species; Catocheilus, a newly charac- 
terized genus, closely allied to Agriomyia, but the labrum is quite 
concealed under the projecting clypeus, and the last joint of the maxil- 
lary-palpi rudimentary ; C. Klugii, from Swan River, is a new species, 
of which both sexes are described ; Thynnoides nigripes, a new species 
from Swan River. Lophocheilus, differing from Thynnoides by the 
labrum being hairy at the margin and truncated, short maxillae, only 
slightly hairy at the outer margin, and especially by the lip, to which 
the tongue appendage is drawn in, and always provided with a long tuft 
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