COCCIDAE OF OHIO. 73 
distance to penultimate segment. The ventral spines are just laterad 
of the corresponding dorsal spines. Two kinds of dorsal pores, oval 
and small round ones, in three rows; Ist, of about 4; 2nd of about 18 
oval and anteriorly several round ones; 4th of about five and several 
rounded ones. Five groups of circumgenital gland-orifices; median of 
about 6; anterior lateral of 12; posterior lateral of about 7. 
Remarks: We have taken this species from Qwercus coc- 
cinae, Y. acuminata, Q. macrocarpa, and Hicoria alba. It is diffi- 
eult to detect on account of its close resemblance in color to the 
bark of the host. 
Genus LEPIDOSAPHES Shimer. 
The species of this genus have a long narrow scale with the 
exuviae at one extremity. The male scale resembles the female 
seale in form and color, but is much smaller and bears only one 
Oyster- 
ce 
exuviae. Lepidosaphes ulmi (li), better known as the 
shell scale’’ or ‘*Oyster-shell Bark Louse,’’ is a serious pest on 
Poplar trees in some sections of Ohio, especially in the North- 
eastern part of the state. Lepidosaphes becki (Newm.) occurs 
in the state only as a greenhouse species, or is shipped into the 
markets on oranges, as is also L. gloverti (Pack.). 
Lepidosaphes beckii (Newm). 
Fig. 41. 
Coceus beckii Newm., The Entom., iv, p. 217. Feb. (1869). 
Aspidiotus citricola Pack., Guide to Study of Insects, p. 527, Aug. 
(1869). 
Mytilaspis citricola Comst., Rep. U.S. Dep. Ag., 1880, p. 321 (1881). 
Scale of female: About 3mm. in length, more or less curved, 
gradually broadened posteriorly, brownish-purple, with exuviae slightly 
lighter in color. The white ventral scale is well developed. 
Scale of male: lLength, 1.5mm., nearly straight, similar in color 
to scale of female, often darker with exuvia pale-yellow. With poster- 
ior hinge as in L. ulmi. 
Female: Median lobes short and broad. well-developed, obscurely 
pointed, serrate; inner lobule of second lobe the larger and usually 
serrate; third lobe rudimentary, notched in the middle. Plates and 
spines similar to those of L. ulmi, except that there are 4—7 plates or 
spines upon the lateral lobules of the penultimate segment. Second 
row of dorsal pores (extending anteriorly from the 2nd pair of plates) 
of about 12. remoie from margin of segment; third row absent; fourth 
of about 4. Median group of circumgenital gland-orifices, 5—6; anter- 
ior lateral, 10—-18; posterior lateral, 7—9. 
