Eleventh Keport op the State Entomologist 99 



PAGE 



tiou, 245. The eggs and larvae, a3 observed by Dr. Lindeman, 246. Its 

 life-period, 246. Brief life of the imago, 246. The three generations, 246. 

 Osborn-Mally on the placing of the eggs, 246. Hibernation of the in- 

 sect, 246. Remedies for it, 247. Some characters of the Thripidfe, 247. 

 Difficulty attending their classification, 247. Formerly believed to be 

 harmless insects, of carnivorous habits, 247. Many found to be destruc- 

 tive to plants, 247. Partial Literature of the Thripidaj, 247-250. 



:ScHOTURUS NivicoLA, the Snow Flea 251 



Bibliography, 251. Possible unreliable references, 251. The genera 

 Acliorutes and Schoturus, 251. At Ghent, N. Y., on trunks of pear trees, 

 251. Classifieation of the Poduridfe, 252. Their leaping apparatus, 252. 

 Another distinctive feature, 252. Eeference to descriptions of S, nivi- 

 cola, 252. 



ACHORUTES DI VERSICEPS 253 



A Podurid observed at Center, N. Y., 253. Its extraordinary numbers, 

 253. Found to be an uudescribed species, 253. Its description and 

 illustrations, 2,53. Original note relating to tlie insect, 254. 



Tyroglyphus heteromorphus, a Carnation Mite 254 



Death of carnations in a greenhouse in Berlin, Mass, 254. A Tyro- 

 glypbus mite and eel-worms found in all of the affected plants, 255. A 

 Gamasus mite also associated, 255. The Tyroglyphus mite lives on the 

 decaying material of the roots, 255. The mites observed for a long time 

 in]confiuement, 255. They fed on a fungus developed upon the carnation 

 roots, 255. Believed also to feed on infusoria associated with them, 255. 

 Thought to injure living tissue of carnations, 255. Assumed a Hypopus 

 form in confinement, 256. Five well-defined forms during development, 



256. The young six-legged form, 256. The larger Hypopus, 256. Trans- 

 formation of a female, 256. The smaller Hypopus, 256. A form assumed 

 by immature mites, 256. The Hypopus a puzzle to naturalists, 257. 

 Different opinions respecting it, 257. Claparede's studies, 257. M6g- 

 nin's later observations, 257. The relation of Hypopus to Tyroglyphus, 



257. The carnation mite believed to be uudescribed, 258. Its descrip- 

 tion of the male, female, immature, and Hypopus forms as a new species, 

 with illustrations, 258. Possibly two species, 2.59. Another mite asso- 

 ciated with the Tyroglyphus, described as a new species, 259. The 

 mite infestation of the carnations found only in old soil, 259. Changing 

 the soil each year recommended, 259. Burning infested plants, 259. 

 Application of kainit or other potash salts for killing the mites, and 

 stimulating growth, 260. 



APPENDIX 261 



