•68 OHIO STATE ACADEMY OF SCIENCE. 



Scale of male: About .7 mm. long, more or less circular, of the 

 same general appearance as the scale of the female. 



Female: One pair of lobes, prominent, about as long as wide, 

 notched on each side, somewhat rounded. Only a slight indication of 

 second lobes. Mesal half of median lobes extend anteriorly to a 

 conical tip. Inner process of first incision very long, club-shaped and 

 knobbed at anterior end and is very constant; outer process small, 

 narrow. Processes of second incision subequal. Margin of segment 

 thickened for half of distance to the penultimate segment. Two plates 

 caudad of first incision; between first and second incision, three to 

 four, and laterad of second incision three plates. On the dorsal sur- 

 face, a spine is located at outer base of median lobes, between first and 

 second incision, laterad of second incision, and about one-half of 

 distance to penultimate segment. On the ventral surface there is a 

 spine just laterad of the corresponding dorsal spine except the first on 

 the median lobe. Dorsal pores very small, inconspicuous with very 

 long ducts, in three series; 1st (extending anteriorly from first in- 

 cision) of 4 — 5; 2nd of about 16; 3rd of about 9. Prof. Johnson found 

 no circumgenital gland-orifices, but in 25 per cent, of the specimens 

 examined, from one to three orifices were found in the place of the 

 posterior lateral groups which are marked by chitinous bands. Anal 

 orifice small and located anteriorly in distance three times the length 

 of the median lobes. 



Remarks : Foimd on the trunks and the older limbs of the 

 white elm, Vlmus americana and Catalpa, at Columbus, Ohio. 



ASPIDIOTUS UVAE Comstock. 

 Fig. 6. 



A. uvae Comst, Rep. IT. S. Dep. Ag., 1880, p. 309 (1881). 



A. uvae Newell, Contr. la. Ag. Coll., No. 3, p. 12 (1899) 



Scale of female: Circular, 1.5 mm. in diameter, rather flat, dusty 

 tan-colored, lighter than dry bark of host. Exuviae sub-central, bright- 

 yellow, covered. When removed leaves a conspicuous white spot. 



Scale of male: Elongated, length 1mm., width 0.5 mm, slightly 

 darker than scale of female, with exuvia submarginal and more convex. 



Female: Median lobes very prominent, parallel, notched on each 

 margin and rounded, the mesal notch slightly nearer the apex; second 

 and third lobes rudimentary with the inner angles slightly produced. 

 Bounding each incision are two subequal chitinous processes, and be- 

 tween the median lobes are two narrow thickenings. There are two 

 simple plates between the median lobes and two serrate ones caudad of 

 each incision. Outside of third lobe, are 3 — 5 prolongations of the 

 margin of the segment resembling plates and about as long as the 

 spines. Spines on the dorsal surface are borne, one on each lobe and 



