COCCIDAE OF OHIO. 73 



distance to penultimate segment. Tlie ventral spines are just laterad 

 of the corresponding dorsal spines. Two kinds of dorsal pores, oval 

 and small round ones, in three rows; 1st, 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 lia^e taken this species from Quercus coc- 

 cinae, Q. acuminata, Q. macrocarpa, and Hicoria alba. It is diffi- 

 cult to detect on account of its close resemblance in color to the 

 bariv of the host. 



Genus LEPIDOSAPHES Shinier. 

 The species of this genus have a long narrow scale with the 

 exuviae at one extremity. The male scale resembles the female 

 scale in form and color, but is much smaller and bears only one 

 exuviae. Lepidosaphes ulmi (L), better known as the "Oyster- 

 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 heckii (Newm.) occurs 

 in the state only as a greenhouse species, or is shipped into the 

 markets on oranges, as is also L. gloverii (Pack.). 



Lepidosaphes hechii (Newm). 

 Fig. 41. 



Coccus beckii Newm., The Entom., iv, p. 217, Feb. (1869). 



AsjDidiotiis citHcoIa Pack., Guide to Study of Insects, p. 527, Aug. 

 (1869). 



Mytilaspis citricola Comst., Rep. U. 3. 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: Length, 1..5 mm., 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, remote from margin of segment; third row absent; fourth 

 of about 4. Median group of circumgenital gland-orifices, 5 — 6; anter-^ 

 ior lateral, 10 — IS; posterior lateral, 7 — 9. 



