COCCIDAE OF OHIO. 55- 



giaud-spines are long, simple, tapering; one laterad of each lobe and 

 one on the margin of the segment toward the penultimate segment. 

 Between the median lobes are two spines, neither dorsal or ventral.. 

 On the dorsal surface two spines are situated along the lateral margin 

 of median lobes, the posterior one the larger, one on outer lobule of 

 second lobe, one one-third and one two-thirds of distance to the penul- 

 timate segment; on the ventral surface there is a spine situated 

 laterad of each corresponding dorsal spine, except on the first lobe. 

 There is an elongated pore laterad of each lobe, one half-way and one 

 near to penultimate segment. Five groups of circumgenital gland- 

 orifices, the median continuous with the anterior laterals. Median, 

 about 9; anterior lateral, 9-12, in partly double row; posterior lateral, 

 12-lG arranged in double row. Anal orifice far removed from margin,, 

 anterior of the genital orifice nearly as far as median group of cir- 

 cumgenital gland-orifices. 



Remarks : Badly infesting a Kentia Palm in the Ohio State 

 University Conservatory. Exeepting the median ridge, this 

 scale is very flat, brownish, and oblong with parallel sides. 



Genus ASPIDIOTUS Boiiche. 



A. Median lobes rather large; second and third usually small 



or rudimentary; plates small, spine-like; margin with 

 two pairs of Incisions bounded by thickened chitinous 

 processes Diaspidiotus 



B. Median lobes large and well-developed; second and third 



reduced or wanting; plates conspicuous, deeply fur- 

 cate and crowded toward median lobes; margins of 

 incisions thickened Hemiberlesia, 

 AA. Neither elongated thickenings nor incisions with thick- 

 ened edges present Aspidiotus s. str.. 



Subgenus ASPIDIOTUS s. str. (Type, A. hederae Vail.) 

 This subgenus is characterized by the absence of chitinous- 

 thickenings and incisions with thickened margins in the last- 

 segment of the female. The plates are well developed and strongly 

 fringed. The scale is light colored and the exuviae are naked. 

 There appear to be no native American species representing this- 

 subgenus. From Ohio two greenhouse species are reported. 

 A. Median lobes very large, broad, notched on each margin 

 near apex and rounded; second and third lobes 

 scarcely one-third of width of median lobes cyanophylli 



AA. Median lobes a little larger than second lobes and appar- 

 ently extending into the segment; five to eight 

 branched and simple plates outside of third lobe hederaC' 



