Descriptions of new species of Hymenoptera. 67 
Steivartii, as I have figured it, will also remain. Chem- 
nitz, however, has described a shell which he calls Helix 
Lugubris, and which is figured by Ferrussac in the splen- 
did work just mentioned — this also is a variety of the 
same species as our shell, and of course has the priority 
in name. If therefore the nomenclature is to be changed, 
it should stand as follows: — 
AcHATiNA Lugubris 
Synonyms 
Helix Lugubris, Chemnitz. 
Lorata, Ferrussac. 
— Luteolata, Do. 
Vulpina, Do. 
AcHATiNA Stewartii, Green. 
It may not be uninteresting to some, to mention, that 
Chemnitz informs us that so high a value was placed by 
the shell dealers on the Achatina Lugubris, when first 
brought to Europe, that he was obliged to give two gui- 
neas for his specimen. 
Descriptions of new species of Hymenoptera of the 
United States. By Thomas Say. Read March 3, 
1828. 
AULACUS. JuRmE. 
A. fasciatus. Wings violaceous with a hyaline band. 
Inhab. Ohio. 
Body black; thorax confluently punctured almost in 
transverse grooves; wings violaceous with a hyaline band 
on the middle, hardly reaching the anal margin; abdomen, 
much compressed; oviduct longer than the abdomen> 
much incurved at tip. 
Length half an inch. 
