( -iOT ) 
XVI. On the habits and economy of certain Hymenopte- 
rous Insects which nidijicate in briars; and 
their Parasites. By Sir Sidney Smith Saun- 
ders, C.M.G., V. P^ Ent. Soc. 
[Read 7th July, 1873.] 
At the last meeting of this Society I exhibited a series of 
Hymenopterous larvae, lately received from Albania in 
their respective briar-cells. 
Mr. Smith having kindly undertaken to figure the re- 
markable larvae of Raphiglossa and Psiliglossa, as weU as 
a new genus of Fossorial Hymenoptera, forming a con- 
necting link between Nitela and Pison, I avail myself of 
this opportunity to supply some details of the habits and 
economy of these insects, all reared from briars on pre- 
vious occasions, and now brought for exhibition ; including 
a fine species of Halticella (one of the ChalcididcB), para- 
sitic within the larva of Osmia tridentata, as herein 
described. 
Raphiglossa Eumenoides, Saund. 
Trans. Ent. Soc. Lond. Ser. 2, vol. i. p. 72 (1851), 
Tab. 6, fig. 4, $, $. 
Sauss. Mon. Guepes Sol. vol. i. p. 2. 1. 
Psiliglossa Odyneroides, Saund. 
Raphiglossa, Saund. Sect. B., Trans. Ent. Soc. Lond. 
Ser. 2, vol. i. p. 72 (1851), Tab. 6, fig. 2 ^,3 $. 
Stenoglossa, Sauss. Mon. Guepes Sol. p. 4. 
Psiliglossa, Saund. Trans. Ent. Soc. Lond. 1862, 
p. 42. 
Both these elegant insects, belonging to the family of 
the Eumenidce, frequent the plains around the Ambracian 
Gulf, where they select, in preference to other briars, those 
which are upright and soft, growing in moist situations, 
which, being exposed to the rain at top, are generally filled 
up towards the exterior with two or three inches of earth 
TRANS. ENT. SOC. 1873. — PART III. (aUG.) 
