COCCIDAE OF OHIO. 67 



Anal orifice very large, removed from margin by about three lengths 

 of the median lobes. 



Remarks : Found very abundantly on young Liriodendron 

 tulipifera, at Painesville, Lake Co., Ohio, July 21, 1903. This 

 species differs from A. osborni, its nearest species, by the jet- 

 black exuviae, the very large anal orifice, and the numerous cir- 

 cumgenital gland-orifices. 



Aspidiotus rapax (Comstock). 

 Fig. 20. 

 A. rapax Comst., U. S. Agr. Report of 1880, p. 307. 

 Scale of female: Very convex, gray almost white, translucent, 

 appearing yellow because of color of insect beneath; the sub-central 

 exuviae marked by a brown or black dot and a concentric ring. Ventral 

 scale snow-white and usually entire. 



Scale of male: Similar to scale of female, scarcely so convex, 

 with exuvia sub-lateral. 



Female: Median lobes only, well developed and prominent, 

 sharply notched oh either side, the mesal notch nearer the apex. 

 Second and third lobes are represented by small, pointed projections 

 of the margin. A deep incision laterad of the median and second lobes, 

 bounded by subequal chitinous processes. Two irregularly toothed or 

 branched plates caudad of each incision, with a simple one between 

 them and two or three simple or furcated ones laterad of third lobe. 

 On each surface, spines are located at the lateral bases of each lobe; 

 the fourth spine at about two-thirds of the distance to the penultimate 

 segment. The ventral fourth spine is slightly laterad of the corres- 

 ponding dorsal spine. Groups of circumgenital gland-orifices absent. 

 Dorsal pores in two or three irregular rows; the second of about 6; 

 the third of about 4. The anal orifice is very large. 



Jieniarks : This is a cosmopolitan insect in M^arm climates, 

 found upon many hosts ; the most important ones being almond, 

 quince, fig, olive, acacia, locust, willow, eucalyptus, Osmanthus 

 and other citrus trees. 



ASPIDIOTUS ULMI Johnson. 



Fig. 22. 



A. ufrni Johns., Bull. 111. Lab. Nat. Hist., Vol. iv, p. 388. 1896. 



Scale of female: Almost round, 1.5 — 2 mm. in diameter, dirty 



white or tan-colored; the latter owing to the corky covering from the 



bark often apparent. New exuviae bright orange-yellow, older material 



is usually faded. A well developed, white, ventral scale. 



