52 OHIO STATE ACADEMY OF SCIENCE. 



lateral margins to the segment. Lobules ol second, third and fourth, 

 lobes, subequal; the outer usually lower and broader. Fourth lobe 

 obscure and serrate. There is a gland-spine, located just laterad of the 

 first, second, third and fourth lobe respectively, and laterad of the 

 fourth lobe at subequal distances are 4-6 tubular gland-spines. Between, 

 the fifth and sixth gland-spines is a dark-colored, pointed projection 

 of the body wall. The first pair of spines on the ventral surface- 

 project caudad between the median lobes; the second and third mesad. 

 of the second and third gland-spines; the fourth between the fourth 

 and fifth, and the fifth spine between the seventh and eighth gland- 

 spines respectively. On the dorsal surface, a small spine at apex of 

 median lobe; second and third spines on lateral lobule of second and 

 third lobes respectively; fourth mesad of fourth gland-spine; fifth 

 between sixth and seventh plates. Groups of circumgenital gland-^ 

 orifices distinct, elliptical in outline; median, 8-16; anterior lateral, 

 20-28; posterior lateral, 15-18. 



Remarks: In greenhouses on Palms, Orchids, Maraitta, etc. 



Diaspis hronieliae (Kerner). 

 This species, Avhieh is a great pest where pineapples are 

 grown, has been reported at Columbus by Prof. E. E. Bogue. It 

 is similar to Diaspis hoisduvalii except that the smaller median 

 lobes project beyond the margin of the segment; i. e., they are 

 partly free, while in the latter the median lobes are adnate, along 

 the entire side, to the segment. 



Diaspis echinocacti cacti Comst. 

 Figs. 43, 76. 



Diaspiii eacH Comst., 2nd Rep. Dep. Ent. Corn. Univ. p. 91 (1883). 



Diaspis cadi Ckll., Can. Ent., xxv, p. 127 (1894). 



Diaspis cacti Osborn, Contr. la. Ag. Coll., p. .5 (1898). 



Scale of female: Nearly circular, 1.5 — 1.7 mm. in diam., white to 

 light-gray; exuviae central or subcentral, dark brown. 



Scale of male: White, unicarinated; exuvia yellowish to 

 brownish. 



Female: Four pairs of small lobes; the mesal with entire margins, 

 apparently extending into the segment, widest near middle, diverge 

 suddenly to a rounded apex. Lobules of second, third and fourth 

 lobes, subequal, parallel and subtruncate. Plates and spines similar 

 to those of Diaspis boisduvalii. Median group of circumgenital gland- 

 orifices, 6-13; anterior lateral, 16-22; posterior lateral, 12-18. 



Remarks: Found in Ohio State University Conservatory 

 badly infesting a night-blooming Cereus. 



