NVMl'liALIXAK: ACI^AIS ,\l I I.P.Kini. 429 



hackward. Tlic fir.st toUcii oiu- lia,~ ul'tlicir |ii(s(ii<c is in scciiiii' .some pale 

 irrt't'iiish \cll(»\v worms .") iniii. loiiij;' and I nun. Itioad, |iii>liin|Li" their way 

 tliion^li a|»('rtin(s tliey had niacU' in the .sich-s ot thcii' host. I'heir moNC- 

 nients are vecy sh>w and their |>assa<2,e I'tieeted lliroiiiih exceed in <>ly small 

 openinii's hv hloatini;" the front part when it has cMnerj^-ed, and so sfpieezinLi 

 their wav ont. in the instances in which 1 lia\(' (dtservcd it they enieru'ed 

 tVom their host late in Auuiist and thi-oiiLili Scpicmhcr. ;ind the tlies ap- 

 peared in about ten days. 



Milherti has other enemies, (Josse mentions one of the Iclnn iiniouidae 

 which issues from liiis chrysalis, which is then like polished uohl in fj-ont, 

 tinii'ed with ^reen. Perhaps this is Ichneumon rufiventris (88: 1) rearj-d 

 liv Dinunock from this (chrysalis. Mr. Kdwards also records an Hemipteron 

 ealmlv suckinii' thi' caterpillai's in one of tlu-ir reti-eats. There is also a 

 j)arasite of the ogg', 'rriehogranuna intermedium (89: ■'^) which comes out 

 of it ahout t»'n days after its time of hatch in ii'. 



Desiderata. I'lio 8})eeial attention (»f observers should he directed 

 towai'd the seasons of this insect after midsunnnei'. to determine whether 

 there are certaiidv two broods in the latter half of the year. Doubtless 

 some moditi<"ition of the history given here would be necessary farther 

 noi'th. Is it anxwhere single brooded? In New England, how large a 

 j)roportion of the latest ehrysalids remain unchanged through the winter? 

 and what effect do they ha\ e upon the comparative abundance of the early 

 spring flight of butterflies ? The curious statements of Messrs. Fischer 

 and killings lead one to ask how often and under what circumstances 

 chrvsalids will disclose their inmates in so short a time as four or five days ? 

 lias weather any efi'ect in changing the larval habits, as seems to be 

 thought I)y Messrs. Edwards and (Tilbert (Can. ent., xvii : 1'S7-1S<S ) ? 

 Does it ever go into hibernation in August, as its European congener is 

 tiaid sometimes to do? 



LIST OF ILLl'S'l llA'JloXS.—At.LMS MILIiKJll'l. 



E<j<j. l.aiiijo. 



I'l. (14. ti.L'. .Sr,. I'laiii. Pl_ 2, ijg. 7. Both Mirfiiccs. 



■i*'- <'kist«T. 12:10. UppiT siirfiicc. 



(Aiteriiilhir. ;$o:25, 26. Male iibiluiiiiiial apiMMiilayiOr^. 



I'l. 74. tig. :W. Mature ••atcrpillar. :!S:i:l. Xi'uratioii. 



7S:.')-t-5T. Front view of lieml.sta.ut's i-iv. .'la:!. Side view oIIk ad aii<l aiipeiulai^'es 



SI:;!. Nfst. oi)eii('d tosliow its coiistnii- cidarizcd. wirli ilitaiN .if tlic structure ivf 



tiuu. tli(> li'us. 



4. Xi-st, outside view. {ifiimtl . 



sr, :(;o. Dermal appeudasre of fourtli stage. ].|_ ■,^)^ ,j„ ,;_ Distribution in Nurtli Amcriea. 



('fti'/salis. »8: 1. I<-hneuuion rufiventris, a parasite. 



I'l. s.;. lig. 4;;. side view. Vi. Coeoons of A|)auteles atalantae. a 



4!». Side view in outline. parasite. 



.">(>. Dorsal view iu outline. SS):8. TrieliogranMiia iuti-nneiliuni. e.iri; 



para>itf. 



