64 PROC. ENT. soc. WASH., VOL. 21, NO. 4, APR., 1919 



drawings illustrating the structural characteristics of the species 

 have been prepared by Emily Morrison who has also been of 

 much assistance in other ways, and to all of these the writer is 

 correspondingly indebted. 



Fam. COCCIDAE.' 

 Subfam. MONOPHLEBINAE. 



Genus Icerya Sign. 

 Icerya minima, n. sp. 

 (PI. 4, fig. 1; pi. 6, fig. 2, A-M.i 



Adult Female. Maximum length of body and ovisac observed 4 mm., 

 maximum length of shriveled body of insect observed 2 mm. maximum exten- 

 sion of ovisac behind hind margin of insect observed 2.5 mm.; maximum 

 width of shriveled body of insect observed 1.5 mm. ; color of dried adult female 

 very dark reddish to blackish red, more or less obscured dorsally by a faint 

 whitish powdery and cottony secretion; body of insect dorsally, strongly 

 and irregularly wrinkled transversely; shape of dried body variable, oval or 

 more typically broader behind, tapering in front, with the two ventral halves 

 of the body shriveled up so that the anterior and posterior faces meet below 

 at the middle line to form a broad round-bottomed V as viewed from the side ; 

 dorsum so shriveled near the margin that there is left all the way round the 

 body a rather prominent marginal border area; ovisac secreted from the pos- 

 terior face of the ventral surface, shape somewhat variable, depending ap- 

 parently on the state of shrinkage of the female, typically flaring out below 

 on each side to reach its greatest width opposite the hinder margin of the 

 body, then tapering gradually to a rounded apex, the whole having the shape 

 of a flattened wedge with rounded off edges, only faintly longitudinally ridged 

 and grooved, appearing rather closely woven but quite fragile, white in color, 

 very indistinctly tarnished in some specimens. 



Body of Adult Female. Mounted on a slide 2-2.5 mm. long, 1.5 mm. 

 wide, rather elongate egg-shaped, broadest behind; when boiled in KOH 

 giving off a small amount of reddish brown stain; with a few large stout 

 setae of varying lengths scattered over the dorsum, particularly near the 

 margin, these forming a comparatively dense cluster around the dorsal anal 

 opening, although here they are smaller than elsewhere, each seta set in 

 a conical protruding base, the longest observed about 19()yu long from base 

 to apex, or about 200/u from the base of the socket to the apex of the seta, 

 which is bluntly rounded, diameter of longest hairs at base about 10 ju, diameter 

 of socket about 26/j., height of socket about 18ju, these dimensions sometimes 

 slightly exceeded, and frequently less; with multiocular gland pores scattered 

 over the dorsum, the relative abundance of occurrence, but not necessarily 

 the number corresponding pretty closely to that of the setae, these pores 

 having a maximum diameter of about lOju and consisting in surface view of 



1 The system of classification followed is that used in the Catalogue of 

 the Coccidae of the World by Mrs. Fernald. 



