84 



INSECTS AFFECTING THE ORANGE. 



varies in color with the age and condition of the individual, from sulphur- 

 yellow to brick-red and dull brown. Length, 0.3S mm (T^-Q- inch). 

 The Mite is slow in movement, and gregarious. White, elongate eggs, 

 and the six-legged young are found in groups of 

 three or four to twenty upon scale-infested orange 

 leaves. 



While this Mite may with sdtoe probability be 

 considered a scavenger, feeding upon dead vege- 

 table and animal matter, it is almost certain that 

 it does also suck the eggs of Scale-insects, with 

 which it is very closely associated. 



A species of Rhlzoglyphus (?), 9 similar to but 

 distinct from the preceding, was sent by Professor 

 Comstock from Florida. It was found in all stages 

 from egg to adult on orange leaves infested with 

 the Long Scale and the Common Mealy-bug. Fig. 

 FIG. M.-orange Mite. (Origi- 39 represents the mite, after a drawing by Mr. 

 Th. Pergande; the following are his notes upon the 

 species: u These Mites were especially numerous around the Mealy-bugs, 

 and they were noticed to suck and destroy the eggs of that insect ; the 

 eggs of the Mite were deposited between the egg-masses of the Louse 

 and also on the leaf itself ; the eggs are white, perfectly oval ; the Mites 



are white, almost transparent, the full-grown 

 ones slightly yellow, with one or sometimes 

 three pale brownish spots ; when there is only 

 one spot it is generally situated on the pos- 

 terior portion of 

 the abdomen, but 

 when there are 

 three spots they 

 are arranged as 

 shown in the fig- 

 ure the front one 

 is largest and the 



FIG. 40. Orange Mite. (Original.) 



two posterior 

 spots are small 



FIG. ^l. Tyrofllyphus mali. 

 (After Kiley.) 



and rather mdis-tmct. The male is shorter 

 and stouter than the female." 



Associated with the foregoing is a Mite 

 [Fig. 40] with a more flattened form, concerning which the following 

 notes are given, with the figure here produced: 10 



"A single specimen of a second species of Mite was also found on an 

 orange leaf sent by Professor Comstock, from Sanford, Fla. This Mite 

 is quite different from the preceding; it is smaller, more yellow, and 

 there are small and very distinct eyes j the legs, especially the first pair, 

 are quite differently formed. It is not as hairy and not as slender as the 



