anew Genus of Infeéts. 203 
Caput punétulatum, fubvillofum villis fordidi coloris. 
Thorax fordido-fubvillofus, linea intermedia longitudinali exa- 
ratus; ca/lis (d), punéto fub alas, et uno utrinque apud 
abdominis infertioriem, pilis decumbentibus fericeo-argen- 
teis ornatis. Squame@ nigrs (e). 
Ale fabhyaline, apice obfcuriores, nervis nigricantibus, abdo- 
mine circitér dimidio breviores, f. petiolum longitudine 
ezequantes. © 
Abdomen clavatum; fegmento primo filiformi nigre; fecundo 
lineari, compreflo, ferrugineo, pun¢cto excavato utrinque no- 
tato; tertio campanulato ferrugineo; quarto nigro, bafi et 
inferné ferrugineo; reliquis nigris 
Long, corp. lin. 10.5 
8 Variat minor, thoracis callis, lateribus, et pofticis pilis fericeis 
deftitutis ; alis unicoloribus, An fexus alter? forfan mas! 
Long. corp. lin. 6. 
This {pecies, which is very common in Norfolk and Suffolk about 
fandy banks of a funny expofure; though rare, according to the 
ingenious Mr. Donovan, in the neighbourhood of London; is eafily 
diftinguifhed from its congeners by the elongated petiolus of its ab- 
domen, and its very fhort wings. It may readily be known, even 
when flying, by the fingular manner in which it carries its abdomen. 
with the anus pointing upwards, fo, that it ftands nearly at right- 
angles with that part of the thorax to which it is attached. The 
hiftory of this infe€&t is very entertaining, as may be feen in De 
(d) By the Ca//i I mean two little tubercles, one on each ‘fide of the anterior part of the 
thorax, to be met with in moft hymenopterous infects. 
(e) The Squame are the minute femi-circular fcales which cover and defend the root 
of the fuperior wings, one over each. 
Dd2 Geer, 
