370 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXV. 



that are absent from the other faunal regions of Colorado. I did 

 not notice any essential change in the fauna with altitude, from the 

 base of the foothills (5,000 feet) to timber line (12,000 feet). Natu- 

 rally' the individuals were later to emerge in the higher altitudes, but 

 on the whole they were the same species. (3) The Alpine fauna 

 occurs on the high peaks above timber line. It is a small fauna, but 

 entirely distinct from the others. It is essentially that of all moun- 

 tain peaks, being comparable with the mountain summits of New 

 Hampshire and with Labrador. (4) The fauna of western Colorado 

 occupies the valleys west of the continental divide and doubtless extends 

 to the Sierra Nevada of California and to Mexico. It was impossible 

 to obtain any larva? from this region, much to my regret. Efforts 

 were made to do so, but proved ineffectual without sacrificing the larvre 

 that had been collected in the eastern foothills. It is of these latter, 

 with a few from the prairie region, that I have made note. 



The following is onl}^ a partial list of species observed. Those of 

 which the larvae did not come under observation, even though the 

 moths were collected, are not mentioned. Besides the 69 species here 

 noted, I have given full life histories of 10 species of Geometrida? in 

 "Psj^che," descriptions of the larvsB of 3 species of Dejjressaria 

 in Mr. Aug. Busck's paper on that genus, 5 species of Gelechio in Mr. 

 Busck's article on the Gelechiidfe, and of Trijyrocris smithmnianux 

 in the Proceedings of the Entomological Society of Washington. A 

 number of species were noted but not bred, and there remain several 

 not yet satisfactorily determined, to which I shall revert when the 

 opportunity offers. 



LIST OF SPECIES. 



Ilemilencn main Dniry. 

 HemUcnni innidnish Stretch. 

 Pseu(hilia:is xli)isl<i('ii.sis I>ehrens. 

 Apanttxia .'injxrba Stretch. 

 Apantem figurata Drury . 

 Leptarctia californix Walker. 

 Leucarctia acrxa Drury. 

 Eubaphe aurantiaca Huebner. 

 HalmdoUi maculata Harris. 



var. aliii Henry Edwards. 

 Heliotli isj/lilni/iijihagn.'^ ( {roteand Robinson. 

 CanulriiKi c.iiiiDid Walker. 

 Leucania Jarcia Grote. 

 Stretchia plusiiformis Henry Edwards. 

 Xylina torrida Smith. 

 Xylomiges simplex Walker. 

 Thyreion rosea Smith. 

 Cucullia Icetifica Lintner. 

 Ipimorpha pleonectiisa Grote. 

 Hssura valens Henry Edwards. 

 Syneda howlandii Grote. 



Sytieda hastlngsii Henry Edwards. 

 Aljipia maccidlnchii Kirby. 

 Malacosoma tigris Dyar. 

 Eudule unicolor Eobinson. 

 Ilydriomene trifasciata Borkhausen. 

 Sciagraphia pervolata Hulst. 

 Diastictis occiduaria Packard. 

 Aids haydenata Packard. 

 Enemera juturnaria Guence. 

 Epiplatymetra coloradaria (jrote and Rob- 

 inson. 

 Odontosia elegans Strecker. 

 Pheosin dimidiatu Herrich-Schaeffer. 

 Tortricidia testaceu Packard, 

 var. crypta Dyar. 

 Melitara jundolmeella Hulst. 

 Acrohasis betulella Hulst. 

 Pionea belialis Druce. 

 O.ryptilus delawarictis Zeller. 

 Pfrrophoriis rndphureodaclylas Packard. 

 Platyptilia cosmodactyla Huebner. 



