channeled dart, and which are constantly drawn up and 

 down; and that the egg, which must be very elastic, is pro- 

 truded out of the ovipositor at a short distance before its 

 extremity. At times, however, the ichneumon made use of 

 its ovipositor, neither as an instrument of oviposition, nor as 

 a sting, but merely as a means of retaining the larva upon 

 which it was feeding in a convenient position. 



But, one of the most extraordinary facts, which Mr. Lewis 

 has communicated to me on the history of this ichneumon is, 

 that the species of larva which is devoured by the perfect 

 ichneumon is also that in which the females deposit their 

 eggs for the support of their future young, Mr. Lewis having 

 observed many of the larva? of the ichneumons feeding ex- 

 HetmVf i^tt fl^Mfr^Her^at^f^^in the roll BP »lerf, 

 where also he found the ichneumon pupa?, which subsequently 

 1 Wj^5cliftMff^Vfejctf nS^its^ S aTitoffWw"», from Mr. 

 Lewis's account, the ichneumons appear in the perfect state 

 as early as the beginning of May ; and they were also observed 

 Mft^eitt^^ probably, during 



all the intermediate time) there is a supply of leaf-rolling 

 caterpillars for their support. Hence it is most probable that 

 the larvae of the ichneumons destined to prey upon the leaf- 

 rollers are the offspring of some of the earlier bred ichneu- 

 » e iM, ol te^^ should be a 



supply of the leaf- rolling larvee for the support of the ichneu- 

 mon's larvae; as these feed only upon the leaf-rolling larvae, 

 which latter go into the earth towards the end of September. 

 The history of the moth which produces these leaf-rollers 

 is not less interesting than that or its parasite : tins Mr. .Lewis 

 joieSeraies^tiibQiuHfcttierJo^icfegi^. .wteW gilicte-iimbu .ismB .1 .ooqS 

 « I "?^bJS? r #»?feJt a fiSsa£K*I MK^IsfeWis tells *M WW^ftbt confine 

 ^f^flHfSl^^ will devour other caterpillars, he 

 rA&#if3J5 gB^BriitatJae A$rv&ijqfi a, Lozotaeina, that of the little 

 ermine moth ( Yponomeuta padella), and of two other species. 

 ! It only remains for me to add, that the leaf-roller is an 

 undetermined species of Gracillaria ; and that the ichneumon 

 agrees with the Pimpla stercorator of Fabricius and Graven- 

 horst, except that the ovipositor is rather shorter than the 



t 3#M6$ft£8*9snri9}nA .einilte oriqoliia ; .wto^ f 8Uflao N OH3T80jl> 

 inB889iq')b rnuvsh aiupibi ailuoii'm <6J£iNiIib 5iiai97 msDiqu oin'nq oluoitiB 



minute parasites belon ging to the families .Chalcididae and 

 Proctotrupidae : — 

 9d | fecfltyfites^ ^MS u ftrf8iia!» > *yffcH? mo $i# brevissimum, 



-albniqgj unoiitui ult ino'Jt ; nioii & v ,?.m>* inm t t»Ijbffrq; 



* Epikopeis y cut, and pteron y wing ; from the notch in the front of the 

 wing. 



