118 THE ENTOMOLOGIST. 
‘Ann. Soc. Ent. Fr.,’ &c. Isent one of these specimens to Dr. 
Mayr, who tells me that in his large experience he never met with 
a Lamprotatus from these galls. Very little is known of their 
economy, but Van Vollenhoven records that Snellen bred 
L. punctiger, Nees, from a dipterous pupa, on May 15th, 1875. 
(Tijd. v. Ent. xix. 251.) 
Pteromalus tibialis, Westw.—This common gall-parasite was 
bred abundantly. 
Homalus (Hedychrum) auratus, L.—This pretty and widely 
distributed species is the commonest of our British Ruby-tails. 
It has only lately been known as an inhabitant of these galls 
(Entom. xii. 24). Mr. Weston bred nine specimens. Like all the 
Chrysidide, it is parasitic on various Aculeata ; in this instance 
the Odynerus was doubtless the victim, but it might have been 
Prosopis. ‘This parasitism and inquilinism of the second degree 
is difficult to trace. 
Homalus ceruleus, Degeer, Dahlb. (= EHlampus violaceus, Wesm.) 
One specimen only of this species occurred. Mr. F. Smith tells 
us all his specimens were from bramble-sticks (Ent. Ann. 1862, 
_ p. 102); it is difficult to connect it with its host in this instance, 
but it was most probably Prosopis. 
Rhopalum (Crabro) clavipes, L. (= erassipes, Fab.). Three 
males and one female of this Crabro were bred. Itis not altogether 
uncommon for various Crabronide to take possession of these 
galls, though it has been but lately noticed in Britain. Dr. Mayr 
has bred T'rypoxylon figulus, Stigmus pendulus and Cemonus 
wrcolor from them. These alone, of course, engender a fresh 
and numerous army of parasites. OC. wnicolor is the species most 
generally met with in this situation, and Dr. Giraud has given a 
detailed account of its parasites in ‘ Verh. z-b., Gesell. Wien.’ xiii., 
1282. Dr. Rudow also writes ‘‘ Die leeren Gallen beherbergen 
kleinere Crabronen, Pemphredon und junge Meconema variwm, 
(Archiv Mecklenburg Vereins, 1875, 50).” 
Passalecus insignis, Van d. Lind. Several specimens of this 
generally common species were bred. Walker once bred a 
specimen of the closely allied P. gracilis, Curt., from these galls. 
Odynerus trifasciatus, Oliv., Fab., Smith, nec St. Farg. 
(= tricinetus, Herr.-Scheeff.) Two males of this rare solitary 
wasp were bred. 
Prosopis rupestris, Smith.—Last but not least. Mr. Weston 
