1922] On some Trophohiotic Coccidce from British Guiana 145 



anterior to the anal plates are very incomplete or wanting; the 

 "siibniarginal 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 chitinized 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 apparentl}^ varying with the 

 development of the ovaries, never strongly convex, shape irre- 

 gularly oval, body only lightly chitinized, clearing almost 

 completely on treating with potassiimi hj^droxide. but showing 

 faint Saissetia-like areolations in the derm in fully matured 



