64 OHIO STATE ACADEMY OF SCIENCE. 



Remarks: On palm, Areca lutescens, in Ohio State Univer- 

 sity Conservatory. 



ASPIDIOTUS OSBORNI Newell & Ckll. 

 A. osborni New. & Ckll., Rep. la. Acad. Sci., v, p. 229 (1898). 

 JiTst before going to press this species was identified on twigs 

 of Quercus alba, collected at Cleveland, Ohio, July 18, 1903, by 

 the author. The grouped-gland-orifiees in the Ohio specimens are 

 more numerous than originally described. 



ASPIDIOTUS OSTREAEFORMIS Curtis. 



Fig. 3. 



A ostreaeformis Curt. (Ruricola), Gard. Chron., iii, p. 805 (1843). 

 A. ostreaeformis Felt, Bull. 4G, N. Y. St. Mus., pp. 323, 352 (1901). 

 A. ostreaeformis Banks, Bull. 34, n. s., Dep. Ag., p. 18 (1902). 



Scale of female: 1 — 1.5 mm. in diameter, dark gray, lighter near 

 mai'gin, somewhat convex; exuviae large, eccentric, yellowish to 

 orange. 



Scale of male: Similar in color to scale of female, smaller with 

 submarginal exuvia. 



Female: Median lobes short and broad, notched on outer margin 

 and rounded, similar to A. ancylus, but not so prominent, scarcely 

 converging, with inner margins thickened; inner angle of second lobe 

 produced into a blunt point; rudimentary third lobe represented by a 

 small angular prominence, or absent. Long, straight, subequal, chiti- 

 nons processes bound the second and third incisions. Plates very 

 inconspicuous, sometimes furcated; two between median lobes and 

 two in each incision. On the ventral surface, a spine is borne at the 

 lateral base of each lobe and one about half-way to the penultimate 

 segment; the dorsal spines are longer and situated just mesad of the 

 corresponding ventral spine. Dorsal pores in four rows as follows: 

 1st (between first pair of chitinous processes) of 2-3; 2nd, 5-6 and after 

 a break 2-3 more; 3rd of 7-8; 4th, a marginal row of 2-4 and a group of 

 5-6 near the penultimate segment. The dorsal pores vary greatly in 

 number and position, but there is a certain characteristic arrangement. 

 Median group of circumgenital gland-orifices, 5-8; anterior and poster- 

 ior lateral of about 10-12 each. Anal orifice small, rather distant from 

 margin and embraced by the inner margins of median lobes. 



Remarks : This is an European species, which has been in- 

 troduced and is rather conmion in sections of some states, however 

 not common in Ohio. 



