306 



UNITED STATES NATIONAL MUSEUM BULLETIN 276 



equipment, 15 



Epicnaptera, 67 



erosa, Clisiocampa, 84, 138, 287 



Glisiocampa disstria race, 84 



Malacosoma disstria, 85 



Malacosoma disstria form, 102 

 erosum, 91 



Malacosoma disstria, 85 

 Euglyphis, 67 

 Eutachyptera, 67 

 experimental crosses, 47 



introduction, 47 



methods, 47 



results, 49 



summary, 64 



feeding, 13, 14 



female genitalia, 39 



female terminalia, 39, 48, 128, 218- 



219 (figs.) 

 forest tent caterpillar. See Malacosoma 



disstria. 

 fragile, Malacosoma, 5, 6, 52 (table), 



64, 67, 123, 148, 162, 164, 167, 



181, 289. 

 fragile, Malacosoma californicum. 



See Malacosoma californicum 



fragile, 

 fragilis, Clisiocampa, 5, 7, 107, 123, 



155, 164, 167, 173, 177,287. 

 Malacosoma, 67, 123, 148, 152, 



164, 167. 

 franconica, Bombyx 66 

 franconicum, Malacosoma, 50, 66, 



187-190, 212-219 (figs., ter- 

 minalia), 241 (figs., adults), 

 frutetorum, Bombyx, 1 1 1 

 Clisiocampa, 285 



Gastropacha californica, 138 

 genitalia, female, 39 



male, 38 

 Gloveria, 67 



Great Basin tent caterpillar, 5, 289 

 gynandromorphs, 34, 230 (figs.). 



hatching, 13, 16, 57 



Heteropacha, 67 



hosts, influence on tent shape, 26, 27 



relation to "specks" in spumaline, 

 22 



suitability, 59 



transfers, 18 

 Hyalophora, 299 

 hybrids, 49, 50, 64 

 hyperparasites, 298 

 Hypopacha, 67 



incurva, Clisiocampa, 173, 176 

 Malacosoma fragilis, 173, 177 



incurvum, Malacosoma. See Mala- 

 cosoma incurvum. 



incurvum, Malacosoma incurvum. 

 See Malacosoma incurvum in- 

 curvum. 



inducta, Malacosoma tigris, 102 



instars, 13, 14, 17 

 heat reaction, 28 



key, adult females, 73 

 adult males, 69 

 egg masses, 83 

 larvae, mature, 77 



Lachneis, 66 

 larvae, 39 



anterior subdorsal spots, 45, 210 



(fig.) 

 chaetotaxy, 59, 210 (fig.) 

 collecting, 16, 17 

 color pattern, 18, 32, 39, 41 



special terminology for M. 

 californicum, 44 



terminology, 43, 210 (fig.) 

 diseased or starved 



effect on cocoons, 33 



eff"ect on cocoon powder, 33 

 instars, 13, 14, 17, 46, 116 

 jerking behavior, 30 

 key, 77 



posterior subdorsal spots, 45, 210 

 (fig.). 



