a new Genus of Infecis. 209 
fingle joint, its belt is of a paler red, and the briftles of the legs 
are very fhort. 
I have fubjoined a fketch which exhibits a comparative view of 
the rofra and maxille in Ammopbila, Sphex, Vefpa, ‘and Apis; which 
will, I hope, though rudely executed, (for I cannot fay “ anch’ io 
fon piltore,”) afford a tolerable idea of the marks and characters that 
feparate thefe genera. 
I have no doubt of there being feveral foreign infeéts, befides A. 
ichneumonea, that belong to this genus (&): but as I have not at pre- 
fent an opportunity of examining the rich cabinets in the metropolis, 
I muft defer faying any thing upon them till a future opportunity. 
EXPLANATION or TAB. XIX. 
No. I. , 
The roftrum, maxilla, and other parts of an Ammophila magnified. 
Fig. 1. The outfide of one of the upper valves of the roftrum, which 
ws is femifagittate. (a) Its feeler of fix joints. 
Fig. 2, The under-fide of the roftrum exhibiting (a) the infide of one 
of the upper valves. (b) Its feeler. (c) The under valve, 
(dd) Its arifta.' (¢) One of its feelers of four joints. 
(f) The tongue. 
Fig. 3. The under-fide of the oti viewed by itfelf, exhibiting (a) its 
bifid c/ava. (b) The orifice of its tube. (c) Its ftalk. 
Fig.4. The under-fide of the head, to fhewthe dire@tion of the roftram 
when at reft. (a) The syne of the roftrum. (b) The neck. 
(4) The infe& ‘figured Mi De ray Tab. xxxii. fig. 17. belongs probably to this 
genus. 
Vor. Iv. Ee Fig, 
