THE GROUP OF DEPRESSUS. 103 



treat precipitously into its shelter." "When complete, the 

 case contains about ten spirals, and the upper surface 

 of the leaf is always placed outwardly. The case may 

 frequently (especially when on the large-leaved roses) 

 remain attached to the leaf and keep green like it. 



The pupa state is passed in the earth in a little cell. 



Giraud mentions that Odynerus spiricornis, Spin., 

 stores its nests with the larva of inanitus. 



Continental distribution : Sweden, Germany, Austria, 

 Russia, France. 



VI. THE GROUP OF DEPRESSUS. 



Head and thorax black, spotted with yellow marks, rarely 

 entirely black. Abdomen black at base and apex, fulvous 

 in centre, rarely fulvous at apex. Legs straw-yellow, the 

 tarsi with a reddish tint. Antennae 19 23-jointed, the third 

 joint as long, rarely shorter, than following two united ; the 

 scape black above, yellow beneath ; basal half of flagellum 

 reddish, the apical black above. Wings hyaline, stigma 

 yellow or partly fuscous. 



The species agree together closely in form and 

 coloration, the only difference being that some species 

 have fewer or no marks in the head, and in one species 

 the abdomen becomes for the greater part fulvous, 

 while the stigma is yellow, fuscous or black. Struc- 

 turally the antennas differ in one or two species, having 

 the third joint shorter than the following two joints, 

 and thus approach the group of inanitus, but as these 

 differ from the latter in some respects and agree with 

 depressus in other characters, they are most naturally 

 placed in this section. Zaddach forms a separate 

 group for Pamphilius hortorum, but I have not followed 

 him in this as the latter merely differs in the head 

 having the yellow marks obsolete or much reduced, and 

 in the stigma being blackish ; but P. arlustorum forms 

 a connecting link in this respect. 



The larvae, so far as is known, are solitary and live 

 in rolled-down leaves (alder-rose). 



