a new Genus of Infefis. 209 



Tingle joint, its belt is of a paler red, and the bridles of the legs 

 are very fhort. 



I have fubjoined a fketch which exhibits a comparative view of 



the rojira and maxlllx in Ammophila, Sphcx^ Vefpa, and Apis ; which 



will, I hope, though rudely executed, (for I cannot fay " anci* io 



fonpittore") afford a tolerable idea of the marks and characters that 



feparate thefe genera. 



I have no doubt of there being feveral foreign infects, betides A. 

 ichneumonea, that belong to this genus (6) : but as I have not at pre- 

 fent an opportunity of examining the rich cabinets in the metropolis, 

 I mud defer faying any thing upon them till a future opportunity. 



EXPLANATION of TAB. XIX. 



No.' I. 

 The roflrum, maxilla, and other parts of an Ammophila magnified. 



Fig. 1. The outfide of one of the upper valves of the roflrum, which 



is femifagittate. (a) Its feeler of fix joints. 

 Fig. 2. The under- fide of the roflrum exhibiting (a) the infide of one 



of the upper valves, (b) Its feeler, (c) The under valve. 



(dd) Its ariflae. (e) One of its feelers of four joints. 



( f ) The tongue. 

 Fig. 3. The under-fide of the tongue viewed by itfelf, exhibiting (a) its 



bifid clava. (b) The orifice of its tube, (c) It's flalk. 

 Fig.4. The under- fide of the head, to fhewthe direction of the roflrum 



when at reft, (a) The apex of the roflrum. (b) The neck. 



(k) The infeft figured by De Geer, Tab. xxxii. fig. i J. belongs probably to this 



genus. 



Vol. IV. E e Fig. 



