No. 34.] HEMIPTERA OF CONNECTICUT: COCCIDAE. 36 1 



7. Scale of female without carina • 8 



Scale of female with sharp median carina ; second stage skin swells 



to form a shell within which the female remains and oviposits . . 



Fiorina, p. 370 



8. Scale of male similar to scale of 'female though smaller ; without 



carina 9 



Scales of male white, sides parallel, and usually with median carina 13 



9. Scale of female elongate, often curved, exuviae small 10 



Scale of female circular to elongate, exuviae covering nearly one- 

 third its length Parlatoria, p. 380 



10. Scale of female broadened posteriorly; on hardy plants 11 



Scale of female much elongated, sides nearly parallel; pygidium 



with peculiar lattice-like thickening of dermis. On greenhouse 

 plants Ischnaspis, p. 379 



11. Scale of male similar to that of female though smaller; pygidium 



of female with five groups of circumgenital gland-orifices 12 



Scale of male narrow, whitish, without carina ; pygidium of female 

 with more than five groups of circumgenital gland-orifices : second 

 stage skin swells to form a shell within which the female remains 

 and oviposits Leucaspis, p. 370 



12. Scale of female convex or flattened, 2.5-3 m m- long, dark brown ; 



median lobes of pygidium broad, with shallow notches on both 



inner and outer margins Lepidosaphes, p. 378 



Scale of female i-i.5mm. long. Median lobes of pygidium narrow, 

 inner margin entire, outer margin notched Pinnaspis, p. 370 



13. Scale of female elongate, pyriform, white, on bark or leaves of 



hardy plants Chionaspis, p. 361 



Scale of female varying from white to dark brown or gray, tropi- 

 cal species on greenhouse plants Hemichionaspis, p. 366 



Fig. 34. Coccid structures (Diaspinae). (1) Lepidosaphes ulmi Lin- 

 naeus, — scale of female. (2) Chrysomphalus aonidum Linnaeus, — scale of 

 female. Greatly enlarged. Drawing by Dr. Philip Garman. 



Chionaspis Signoret. 



This genus contains several species, which occur mostly on 

 hardy plants, being found on the bark and sometimes on the leaves. 

 In most species the males are white, narrow, and much smaller than 

 the females, which are pyriform, white or light gray, with the 

 exception of C. euonymi, which are dark gray. A few species 

 only are considered to be pests. 



