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VIII. Descriptions of Chalcidites. By Francis Waker, Esq., F.L.S. &c. Sc. 
Read June 17th, 1845. 
THE following communication contains a description of species not included 
in my previous publications on Chalcidites in the ‘Entomological Magazine,’ 
the * Annals of Natural History,’ the * Entomologist, and the * Monographia : 
Chalciditum.' In these works further information will be found respecting 
the genera and species mentioned as being related to those here described. 
Preroma.us, Swederus. 
This genus comprises a great number of species, somewhat similar in struc- 
ture, and having, comparatively speaking, one unvarying form, while its out- 
skirts, or the subgenera whereby it passes into other families, are diverse in 
appearance, and contain but few species. In the * Entomological Magazine' 
(vols. ii. and iii.), and in the * Monographia Chalciditum’ (vol. i.), I have at- 
tempted to describe the characters of the British species of this genus, and to 
indicate their divisions into groups. In the second volume of the last-men- 
tioned work, and in some numbers of the * Annals of Natural History, I have 
mentioned several exotic species. The characters that I have given are de- 
fective, owing to the omission of the structure of the metathorax or propodeon. 
The antenne in the following species are nearly similar in structure ; the first 
joint is long and slender; the second is cyathiform ; the third and fourth are 
very minute; the following joints to the tenth successively decrease in length. 
The head and thorax are finely squameous; the abdomen is smooth. 
PrEROMALUs Acroratus, fem. Viridis, abdomine cupreo, antennis piceis, pe- 
dibus fulvis, coxis femoribusque basi viridibus, alis fascis. = 
Corp. long. lin. 1; alar. lin. 13. 
Body shining, rather short : head and thorax green: head broader than the thorax: antennz 
clavate, dark piceous, a little longer than the thorax; first joint fulvous; club conical, 
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