Eleventh Keport op the State Entomologist 259 



rior two pairs of legs are extended forward, usually nearly parallel; the 

 first pair are more elongated, especially the tarsal segments which 

 are terminated by oval suckers on long pedicels (fig. 8), and at the base 

 of the suckers a pair of claws. Second pair of legs shorter, similar but 

 without the oval sucker; both pairs with the clavate organ as observed 

 in the mature form. Posterior legs much more slender, shorter; at base 

 of last pair, six ventral suckers arranged in two parallel rows. 



Another stouter oval form was also observed. This may be assumed 

 by the larger females and possibly by the males. The head is nearly 

 concealed and the legs extended forward (fig. 9) ; the anterior pair, 

 however, with no trace of suckers (fig. 10). This form is usually nearly 

 the size of the mature mites, while the smaller Hypopi are less than half 

 the size. Six ventral suckers may easily be seen near the base of the pos- 

 terior pair of legs. 



It is possible that more than one species may be represented by the 



forms above described. But, as they were all intimately associated during 



life, and as a direct connection has been shown between two forms and 



their Hypopi and in all probability between the forms designated as male 



and female, no other way is open than to group them all under a single 



species. 



An Associated Mite. 



Several very active reddish mites were found on the roots of the car- 

 nations. One was seen within the cavity with the Tyroglyphus and 

 was probably preying upon it. Specimens of these were submitted to 

 Prof. Osborn, who pronounced them a species of Gamasus related to 

 those grouped with G. crassipes (Herm.). As no description of this mite 

 is accessible to me, it is figured and described ; in the event of its being 

 new it may be known as Gamasus longipalpoides. 



This mite (PL XVI, fig. i) is about i mm. long of a broadly ovate 

 outline and of a pale red color. Anterior legs much elongated, palpi- 

 form, terminal segment about twice the length of the precedmg one; 

 second pair of legs very stout, much shorter and acutely bent, terminal 

 segment, spiny, chelate, and with a delicate double claw (PI. XVI, fig. 

 \a) ; posterior legs, spiny and with minute claws. 



Remedies. 



The trouble at Mr. Wheeler's was confined largely, if not entirely, to 

 plants which had been set in the greenhouse on soil left in from the 

 preceding year. Very few plants were affected that had been set on soil 

 brought into the greenhouse the autumn before. Hence, much of the 

 trouble from these mites can be avoided by changing the soil, on which 

 the plants are grown, each season. 



It would be well to remove infected plants from the greenhouse as 

 soon as they exhibit signs of weakness. Their prompt destruction would 

 tend to prevent the spreading of the mites from one plant to another. 



