ERRATA ET ADDENDA. ix 
a wing only has been discovered, under the name of Hemero- 
bioides giganteus (Proceed. Geol. Soc. June 6. 1838) ; it haying 
appeared to me to possess greater affinities with the wing of 
Hemerobius than any other existing insects. 
Page 72. line 35. for “ apud” read “ Apum.” 
74. line 4. Say (Boston Journ. of Nat. Hist. vol.i. no. 4.) describes a section 
of Lyrops with only one ocellus. 
76. note *, The Baron de Romand has had the kindness to send me a copy 
of a memoir on the variations in the nervures of the Hymen- 
opterous wings, recently published by him privately, and illus- 
trated by numerous figures. 
82. line 10. and 22. for “ cuckoo flies” read “ ichneumon flies.” 
84. et passim, for “ Bethyllus ” read “ Bethylus.” 
88. The valuable classification of the Hymenoptera, published by 
Mr. Haliday, reached me too late to be noticed in the text. 
It is partially noticed in the Generic Synopsis. 
114. line 18. for “ Siricide ” read “ Uroceride.” 
119. and 121. Saint Fargeau, in his Hist. Nat. Hymenopt. p. 5. notes 1, 2, 
and 3., has re-stated his opinion of the parasitic nature of 
Urocerus and Xiphydria. The German entomologists, who 
have such ample opportunities for studying the habits of these 
insects, describe them as Xylophagous, and the structure of 
their jaws confirms such statement. 
123. line 13. for “ top” read “tip.” 
line 33. I have used the name of Entomophaga instead of Latreille’s Pu- 
pivora, which is inapplicable to the majority of the species. 
125. note *, add: Hartig. Revision of the fam. Cynipide (divided into twenty- 
one Genera) in Germar’s Zeitschrift, f. d. Entomol. No. 3. 
127. line 20, for “ 73. ¢.” read “73. 29. ¢.” 
143, line 8. M. Wesmael (Ann. Soc. Ent. de France, 1837, pt.3.) describes 
the habits of a Bracon, which attacks Scolytus. I took one 
of the species of this genus in the Pare de Belle Vue, near 
Paris, on felled trees infested by Scolyti, and which M. Au- 
douin also informed me was its parasite. 
145, line 25. Moses Harris states that “on a moderate computation,” there 
might be 20,000 minute Ichneumons found by him ina single 
chrysalis of a goat moth (Aurelian, pl. 23.). 
146. line 29. bis, for “ its” read “ their.” 
M. Schiodte has figured some Ichneumonide in Guérin’s Maga- 
zin de Zoologie, which exhibit similar peculiarities in the mode 
of exclusion of the eggs. 
148. line 36. for “ both at the top and bottom” read “ either at the top or 
bottom.” 
164. line 34. My monograph on Leucospis has been published in the second 
part of Germar’s Zeitschrift, f. d. Entomologie. 
169. Mr. Curtis, in his dissections of the ovipositor of Proctotrupes, 
noticed, in addition to the parts figured by me ( fig. 78. 7 ),an 
elongated membranous plate. I had also noticed this in seve- 
ral of the females of this genus which I had dissected, but 
