:]7 



are selfiuni toiiiid in open grass-lands, ;is with tlir Noctiiit/w, cxcciil a lew 

 species, eliirllv L(ir('i////i(f,\v\nr\\ sratlier about liouses. In Maine, wlierc I luive 

 observed them for niiiiiy seasons, liic geoinetiid moths begin to a|)|)ear during 

 the last week in May, when Lozoisraninia dojltiaria begins to appear in dry, 

 open lields near pine-woods, and soon nHfv -Nenioria gftiluric/, F/doiiia iiotu- 

 fdiid and tn//i(Y/f(iri(t, Cori/cia re.staliafa and s( mklatata, lead oil' the hosts 

 lliat soon I'olldw. Hiiring the last of ^lay. I'/cinijr'ui Jluviata and Oclnjt'ta 

 de^'ignata and ferrugaia enter houses, attracted by the light. About the 

 middle of June, the £«?e(>;rt<«(i' begin to appear, and are most al)undant late 

 in June and in July in hard-wood forests. During the middle of Jinie. the 

 sjieeies of Cjiuiatophora {Bo(ir»ria) and Tephrusia also ap|)ear in pine-woods, 

 often clinging to the trunks of trees in shady places. 



In I^rassacliusctts, the season opens a week earlier, and in the Middle 

 States a week or two still earlier. In Colorado, Jinie and July are the 

 best collecting-months. In Vancouver Island, Mr. Crotch collected with 

 great success in July. In Calitbrnia, the winter-months and March are ffood 

 collecting-seasons. 



1 have not attempted in this essay to generalize the times oi' appearance 

 of our geometrids, but to carefully give, so far as 1 have been al)le, the dates 

 ol" capture in connection with the localities. 



\S 1(». — DevelopmivNT of the thorax of the imago. 



The following observations relate to the development of tin; ditferent 

 parts composing the segments of the thorax in a Tineid moth. They were 

 made many years ago on the larvic of a Tineid moth, tiiiind in the nest oi 

 Odi/nert/s albophalcrattis. The (uiterpillars bad been paralyzed by the sting 

 of the wasp, and, though incapable of motion, in one or two cases had sutiicient 

 vitality to |)ass into the ])upa stale. Some of the drawings were made iVmn 

 lil'e l)y myself; others, from alcoholic specimens, by Mr. Emerton. Unfor- 

 tunately, the specimens have been lost, and the followiuif description is accord- 

 ingly drawn up from the sketches, which represent the specimens just as 

 (hey appeared, with the pupal integument showing very plainly through (he 

 thin, (ense, larval skin. The species to which the larva belonged is unknown. 

 It was a green caterpillar, of the usual tltrm, and seemed (o be a Tineid 

 rather than a Toitricid. 



Fig. 1, 1(/, (pi. 7), side-view, shows the liist stage of (he semi-pupa. 



