48 OHIO STATE ACADEMY OF SCIENCE. 



group. Median group of circumgenital gland-orifices, 10-21; anterior 

 lateral, 20-35; posterior lateral, 10-24. 



Keraarlfs : Found on Cottonwood at Painesville, Lake Co., 

 0., by j\lr. G. A. Runner, one of the State Nursery and Orchard 

 Inspectors. The lobes of Cli. longiloha are longer than in any 

 other species except gleditsiae, but the latter can easily be distin- 

 guished by the fused median lobes and th wide separation from 

 them of the second lobes. In the Ohio specimens the circumgeni- 

 tal giand-oriiices are more numerous than in those originally 

 described ; median group, 14-21 ; anterior laterial, 24-35 ; poster- 

 ior lateral, 14-24. In most cases the dorsal pores were more 

 numerous than in the original. 



CHIOxNfASPIS ORTHOLOBIS Comst. 



C/i. orthololns Comst., Rep. U. S. Dep. Ag., 1880, p. 317 (1881). 



(Jh. ortholobis Cooley, Spec. Bull. Mass. Exp. Sta., p. 17 (1899). 



Ch. ortholobis Newell, Bull. 43, la. Exp. Sta., p. 154 (1899). 



Ch. ortholobisHunter, Kan. Univ. Quar., ix, p. 101 (1900). 



Scale of female: Longer than Ch. longiloba, 2 — 2.5 mm.; broadly 

 oval, slightly elongated, usually regular; white to dirty-white. Exuviae, 

 8 mm. long, brown and more noticeable than that of longiloba. 



Scale of male: Similar to that of Ch. longiloba. 



Female: Median lobes close, parallel half-way on inner margins, 

 then each lobe narrows similarly from each side to an obtuse point, 

 or rounded. Inner lobules of second and third lobes rounded, larger 

 than outer lobules and oblique. The gland-spines are arranged as 

 follows; 1, 1-2, 1-2, 2, 4-5, shorter than in longiloba. The spines are 

 arranged as in the latter. Second row of dorsal pores represented by 

 the anterior group of 4-7; third row with 7-9 in anterior and 5-8 in 

 posterior group; fourth row with 9-11 in anterior and 5-9 in posterior 

 group. Median group of circumgenital gland-orifices, 10-25; anterior 

 lateral, 18-35; posterior lateral, 16-24. They are quite variable in the 

 same specimen. 



Remarks : Found by the author on Cottonwood at Newark, 

 O. This species also occurs on willow, poplar and butternut. 

 The median Jobes are parallel in general direction and so close 

 along the basal half, as to appear fused. There is a relationship 

 indicated between CUi. longiloha and Cli. ortholobis in the absence 

 of carinae on the male scale. This featui-e distinguishes these 

 tAvo species from all other known species. exce{)t that Ch. platani 

 is very feebly unicarinate or the carinae are sometimes wanting. 



