452 



FOKTY-EIGHTH REPORT ON THE STATE MUSECM 



Tyroglyphus Lintneri Osborn. 



A Miisliroom- Infesting Mite. 

 (Ord. Acaeina: Fam. Acakid^.) 

 In December, 1892, some mushrooms were sent to me from James- 

 port, Suffolk county, Long Island, suffering from an attack of mites. 

 The mites abounded in blackened cavities in both the pileus and stalk. 

 They were white, shining, and long-haired, and were apparently an 

 undescribed species of Rhizoglyphus. When submitted to Prof. 

 Herbert Osborn for examination, he found the mile to approach nearly 

 to Tyroglyphus phylloxerce Riley, but to differ from it in several 

 structural details, and has described it under the name of Tyroglyphus 

 Lintneri, in Science, xxii, 1893, p. 360, with figures. For convenience 

 of reference, the description and figuies and accompanying remarks are 

 herewith given: 



Some time ago I received from Prof. J. A. Lintner specimens of a 

 mite which had been found infesting mushrooms quite seriously, and 

 from its habits and the statements concerning its numbers, it is likely 

 to prove a very important pest of this crop. From the literature which 

 is available, it does not appear to be described, and is certainly differ- 

 ent from the species described as infesting mushrooms in Europe. It 

 approaches more nearly to the Tyroglyphus phylloxerm of Riley, but 

 is quite different in many structural details. Since it is likely to prove 

 of importance, it seems desirable to describe it, even though it may 

 possibly prove identical with some of the described European forms. 



(.,) 



Tyroglyphus Lintneri n. sp. a, dorsal view; 6, ventral view; c, tarsus more enlarged— length 

 shown in circle to right. (From nature, by H. Osborn.) 



Description. 



Tyroglyphus Lintmri n. sp. The mandibles are large, chelate, 

 strongly toothed, the palpi terminating with a strong hook. The tarsi 



