COCCIDAE OF OHIO. 51 



Orove, Fairfield Co., Newark, Licl\:ing- Co., Somerset, Perry Co., 

 Qualver City, Guernsey Co. 



Ho ivardia b iclav is ( Comst. ) 

 Fig. 39. 



Chionaspis (?) biclavis Comst., 2nd Rep. Dep. Ent. Corn. Univ., 

 p. 98 (1883). 



Howardia biclavis Berl. e Leon., Riv. Pat. Veg., iv, p. 348 (1896). 



Scale of female: Circular, convex, 2 mm. broad, white, variously 

 colored by epidermis of host plant under which it mines. Exuviae 

 marginal, the first projecting beyond the margin of the scale. 



Female: Median lobes large, broader than long, approximate at 

 base, somewhat pointed, lateral margins serrate, mesal margins diverg- 

 ing; second lobe small, pointed, simply a projection of the segment; 

 third lobe rudimentary, low serrate; fourth lobe broad, low, incised 

 forming two pointed serrate lobules. Plates simple, spine-like, in- 

 creasing in size from the meson; two small ones between median lobes, 

 two between first and second, usually three between second and third, 

 four or five between third and fourth lobes, and laterad of fourth lobes 

 six or seven larger plates. Spines accompany each group of plates 

 on both dorsal and ventral surfaces. Dorsal pores rother numerous, 

 very small, in three interrupted rows. Circumgenital gland-orifices 

 wanting. On the ventral surface accompanying each group of plates, 

 is a group of very small spines. Extending anteriorly within the 

 body wall, from the median lobes, are two long, club-shaped, chitinous 

 thickenings, which are characteristic of this species. Anal orifice 

 situated far anteriorly, just anterior of the genital orifice. 



Remarks : This Coccicl was found badly infesting Hibiscus 

 aculeatus in the Ohio State Universty Conservatory. It has a 

 peculiar habit of mining under the epidermis of the host plant 

 and maturing there. 



Diaspis boisduvalii (Signoret). 

 Fig. 42. 



Diaspis boisduvalii Sign., Ann. Soc. Ent. Fr., (4). ix, p. 432 (1869). 



Diaspis boisduvalii Comst., 2nd Rep. Dep. Ent. Corn. Univ. p. 86 

 (1883). 



Scale of female: 2 mm. diam., circular, sometimes a little elon- 

 gated, white or light-gray. Very large exuviae slightly darker in color, 

 nearly central. 



Scale of male: White, strongly tri-carinated, usually massed in 

 large numbers and covered with white, wooly hairs. 



Female: Cephalo-lateral angle of body is prolonged into a small 

 projection. Median lobes are large, wing-shaped, divergent, separated 

 at base, serrate on mesal margins, and attached for entire length of 



