a new Genus of Infecis. 207 
Caput magnum, punéctulatum, atro-villofum. Mazxil/e¢ longitudine, 
capitis valdé minaces. rons planiufcula. 
Thorax et pectus atro-villofa. Sguame nigra. 
4l@ \ongitudine corporis fubhyaline, apice nigre, venis ferru- 
gineis, cofta fufca. 
Abdomen nigrum, lanceolato-ovatum ; petiolo brevi villofo; feg- 
mento fecundo, tertio, quartique bafi, rubello-ferrugineis. 
Pedes poftici, abdomine dimidio longiores.. Tarfi fetis valde afperi, 
Long. corp. lin. 8.—Alt. Sex ? lin. 64. 
The larger fpecimen of this infe€t I purcliafed, as Englifh, at a 
fhop in Piccadilly; but the {mall one (which I believe to be the 
male) I took upon the funny bank of a fandy ditch near Martlefham 
Heath, at the fame time with A. afinis. I think that I have 
likewife feen it in the rich cabinet of our Secretary, my tutor in~ 
Entomology, and to whofe liberality mine is indebted for fome of its 
moft valuable contents. 
This infect is beyond a doubt the Sphex arenaria of Fabricius, and: 
likewife the S..Airfuta of. Scopoli and Schrank; although Gmelin 
and Villars make them different. It is clearly diftinét from the. 
two preceding fpecies. Its wings of the length of the body, tipped 
with a black nebula; its abdomen of a figure inclining to ovate; its. 
large head very villofe, as well as its trunk ; its maxille threatening 
- with an-immenfe acumen, plainly prove this. It is larger alfo in. 
all its parts; the band which furrounds its abdomen is of a brighter 
red; the legs are much more briftly, efpecially the tarfi; and the in- 
terior {pine, which arms the apex of eacly of the pofterior tibiz, is. 
more con{picuoufly peCtinated, . 
4: Ammo- 
