THE ENTOMOLOGIST’S WEEKLY INTELLIGENCER. 
199 
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resembled that of A. terminella. — John 
Scott, Southfield Villas, Middlesbro’-on- 
Tees; Sept. 5. 
Hymenoptera. 
Crabro Lindensis. — My puzzle (ante 
p. 70) is solved: I place the solution of 
it at your disposal. I have had a piece 
ol willow-wood sent to me this morning 
from York that throws light on the 
borers of the spruce-fir I noticed in Surrey 
last winter. This wood is pierced in all 
directions, and each bore, as in the former 
instance, contains one or more flies; these 
are Sarcophaga carnaria, Musca meridi- 
ana, M. vomitoria and some of the Syr- 
phidse. Closely attached to these flies is 
a pupa-case : from this pupa-case I have 
seen emerge one of the Eumenidce , or 
Carpenter-wasps, as they are usually 
called. The history is now soon read ; 
the Carpenter-wasp is the borer of these 
holes. As soon as the bore is formed by 
means of her powerful mandibles — for 
the male wasp takes no part in her pro- 
ceedings — she goes in quest of some un- 
fortunate flesh-fly, which she seizes and 
carries off bodily to the bore. She pushes 
it head foremost into the hole, lays an 
egg in its abdomen, fastens up the 
entrance with the detritus of the rotten 
wood. Her work is done: the egg hatches 
and the young larva finds its nutriment 
at hand, on which it is to subsist in the 
larva state. In process of time it spins 
its pupal cerement, whence it emerges, 
gnawing its way through the cocoon- 
detritus that closed up the entrance of 
the bore. This is a practical solution of 
the puzzle: this time, at all events, the 
“spider” is not the culprit; he has 
enough deeds of cruelty to answer for, 
without being charged with this wholesale 
slaughter! — Peter Inchbald, Slorlkes 
Hall, Huddersfield ; Sept. 7. 
[The insect sent is Crabro Lindensis, 
a scarce species, and hitherto only 
taken singly. Were any more speci- 
mens taken ?] 
EXCHANGE. 
Lasiocampa Rubi and Cossus Ligni- 
perda. — I have many larvse of these 
species (of the former 200), and can get 
many more. If any one wants these 
larvae I shall be happy to send them on 
receipt of a box and return postage, 
without any return whatever. The better 
way, to save useless postage, is to apply 
by letter, and I will wait a week before 
answering any, so that all may have a 
fair chance.— W. Winter, Aldeby, Bec- 
cles ; Sept. 12. 
Exchange. — I shall be happy to ex- 
change Xanthia Gilvago for local species. 
Write first.— T. Fyles, Scatter, Kirton- 
in-Lindsey ; Sept. 10. 
Exchange. — I have this week received 
three boxes, all containing the same spe- 
cies of small pearl-bordered Fritillary, 
in exchange for Colias Edusa. It would 
be belter if applicants would write a line 
before sending a box, to say what species 
they have to offer in exchange. The 
kinds I want are T. Rubi, T. C-album, 
S. Davus, E. Cassiope or E. Blandina . — 
John Fryer, jun., Manor House, Chat- 
teris, Cambridgeshire ; Sept. 10. 
Exchange.— I have duplicates of the 
following insects for exchange: — 2,12, 
13, 15, 33, 34, 36, 37, 45, 46, 61, 64, 65, 
71, 137, 141, 173, 484 and 495, which I 
should be glad to exchange for the fol- 
lowing 4, 1 1 , 20, 23, 53, 59, 62, 63, 69, 
75, 90, 108, 115, 124, 166, 175, 181, 186, 
1 89, 492 and 493. Applicants must please 
write first, to prevent disappointment, as 
my number of some of the insects is but 
small.— R. E. Brameld, St. John’s Street, 
Mansfield ; Sept. 12. 
Exchange. — I have duplicates of the 
following, numbered as in the ‘ Ma- 
nual:’— 19, 21, 67, 154, 190, 193, 231, 
233, 256, 269, 290, 293,294,347,351, 
372, 373, 394, 410, 415,430,462,488, 
496, 518, 607, 613, 749, 769, 790, 834, 
836, 1083, 1102, 1109. I should be glad 
