Although this species was not described until L898, a the describer, 

 Mr. Theodore Pergande, of this Office, had known it since L872, when 

 it was found upon peach trees at Hillsboro, Mo. 



FOOD PLANTS. 



For many years the terrapin scale has been considered a specific 

 enemy of the peach and has been confounded by many entomologists 

 and others with Eidecanium persiese (Fab.), the preeminent peach soft 

 scale of Europe. At present we know it as infesting a large number 

 of host plants, including' many varieties of peach and cultivated plum; 

 various species of wild plums and cherries; Prunus simonii,' apple: 

 pear; quince; several species of Crataegus; three species of maple, par- 

 ticularly Acer succharinum; oriental and western sj T camores; Carolina 

 poplar; olive; blueberry (Vaccinium sp.): Bumelia, and spice bush 

 ( Benzoin h, nzoin). 



DESCRIPTION. 



The following technical description is inserted to facilitate the deter- 

 mination of this species b} r entomologists, or anyone who may have 

 access to a compound microscope. 



Adult female (fig. 2). — Nearly hemispherical, small, length 3 to 3.5 nun., exhibiting 



many of the superficial characters of the hibernating form described above, though 



showing a tendency to fade rapidly after oviposition until by the 



autumn she is plain dull yellow or terra-cotta color. Fresh 



unrubbed specimens are covered by a thin glassy secretion of wax 



which scales off readily. When cleared by boiling in a solution 



of potassium hydroxicl, the derm is left quite colorless, excepting 



the brown chitinized anal lobes and a narrow chitinized area 



surrounding the lobes. Antennae (fig. 3, b) composed of six 



segments; segment 3, which occasionally shows a pseudo-joint, is 



IG ' , '77, f rra P in equal in length to 4, 5, and 6 together; next in order of length 

 scale (Eulccanium I . , ,. 



nigrofasciatum): come segments 2 and 1 in order. The antenna' exhibit the ordi- 



Adult female, nary cluetotaxy. Legs well developed; tibia slightly longer than 



Enlarged (after tarsus, bearing a pair of long, knobbed tarsal digitules and a pair 



Pergande). . . 



of long expanded ungual digitules. There are irregular rows of 



many pores leading from the spiracles to the spiracular spines (fig. 3, c) on the 

 margin of the body. The median spiracular spine of each group is robust and about 

 50 nun. long, three times the length of the two shorter spines; marginal spines 

 (fig. 3, il) slender, about equidistant, except four, which are closely crowded at the 

 anterior median point. 



The distinguishing microscopical characteristic of this species is the irregular single 

 or double mid-dorsal row of 25 to 40 low, subcorneal appendages (fig' 3, e), appealing 

 like pores, extending from near the anal lobes to nearly above the sucking mouth- 

 part--. These pores are usually quite evident in a mounted specimen and serve to 

 separate this species surely from all others. The thick anal plates (fig. .">, a) are 

 quite symmetrical, somewhat longer than broad, with the posterior lateral margin 

 rounded and thickened. Each plate bears two minute apical and two subapical 



" Bui. is, n. s., Div. Knt,, LT. S. Kept. Agric, pp. 26-29. 

 [Cir.88] 



