1922 ] On some Trophobiotic Coccidce from British Guiana 145 
anterior to the anal plates are very incomplete or wanting; the 
“submarginal compound pores” are as described by Newstead, 
but those just in front of the anterior spiracles are perhaps 
one-third as large as the two anterior to the posterior spiracles; 
ventrally there are tiny simple pores in addition to the multi- 
locular disk sort; dorsally there are large, circular, faintly 
multilocular disk pores, much smaller, circular, heavy-walled 
simple disk pores and, occasionally, from two to five such pores 
grouped in a solid heavily ehitinized plate. 
The larva of this species differs from that of the new species 
described below most obviously in the length of the hairs in the 
ventral abdominal rows these in the present species being very 
minute, while in the new species they are much longer and more 
conspicuous. 
Akermes secretus sp. nov. 
Reference— Coccus sp., van Zwaluwenburg, Jour. Econ. 
Ent., vol. 10, 1917, p. 515. 
Occuring in cavities in the stems or beneath the bark of the 
host, attended by ants. 
Adult female . — Color in life different shades of light reddish 
or yellowish brown often varying to a hint of lavender or purple 
brown; color of alcoholic specimens dorsally very pale grayish 
brown, with more or less distinct linear transverse mottling of 
dark brown, tiny blackish flecks along margin, a brown area 
around anal plates and small white spots at the spiracular 
openings, ventrally with a marginal band of dull brown, the 
anterior two-thirds of the surface yellow cream, shading off to 
brown at edges, the ventral abdominal segments about the same 
color as the dorsum, the whole venter variously mottled and 
flecked with dark color; maximum length mounted on slide 
5.5 mm., width 4 mm.; convexity apparently varying with the 
development of the ovaries, never strongly convex, shape irre- 
gularly oval, body only lightly ehitinized, clearing almost 
completely on treating with potassium hydroxide, but showing 
faint Saissetia-like areolations in the derm in fully matured 
