138 ENTOMOLOGICAL NEWS. [May., 



chatnisorus. Kodiosoma, April 8th, on Trifolium ciHatum, Esc- 

 holzia epeciodes. Gillia achillcBfolhim, Festuca viyurus and 

 dried twigs. Lyccsyia piasus, on the racemes of the Lupisus 

 densifiora, and on the bracts of L. chamisonis after they 

 have fruited, Lycczna var. on the innersideof the unopened buds 

 of the thyrse of the ^sculus californicus (Buckeye). Pyrameis 

 carye. May 6th, on the leaves of Lupinus, upperside. Lyccena 

 acmon, on or near the top buds of Hosackia parvifiora. Coenym- 

 pha California, May 6th, on dried twigs near its food plant, 

 Mehca biibbosa (a grass). Thecla nelsonii, June 9th, Libocedrus 

 dicurrens, always on the shaded side of the leaves. Ctenucha 

 rubroscapiis, July loth, on the stalks oi Hosackia forreya Alaria 

 fiorida, July loth, Oenothera brenuis var. grandijlora, buds 

 habits same as the eastern species. Hepialus lembertii, most any- 

 where on the ground and in the edge of marmot holes, wet low 

 ground. Afithocharis lajiceolata, on the fruit pods of the Arabis 

 arciiata. Chrysophanus mariposa, on the stalk and the under- 

 side of the leaves of Vaccinium. Chrysophanus helloides, Oxytheca 

 spugidina and Guzoppytwn diffusum. Melitcea chalcedon, on 

 Pentstemon brachycarpa and not gregarious like the high Sierra 

 variety. 



o 



A CASE OF MIMICRY. 



By Otto Lugger. 



Among the many curious things encountered among insects 

 few are more interesting than the mimicry shown by many of our 

 pets. It almost seems as if some of them could actually distin- 

 guish not simply between colors, but even betv/een the most 

 delicate shades of colors. Those that have hunted for Catocalce 

 have reasons to feel certain that these showy moths know all 

 about the colors of the upper surfaces of their front wings, and 

 that they are perfectly able to select such portions of the bark ot 

 trees that harmonize and blend with them. We find the same 

 thing among the Geometridae, only in this case the color of the 

 upperside of both wings has to come into action, as these delicate 

 moths rest with more or less expanded wings. Some years ago 

 I accidently discovered a member of this family of moths that 

 forms a most peculiar exception to this rule. While collecting 



