1922 ] On some Trophobiotic Coccidce from British Guiana 139 
triangular pores, ventrally with these pores less numerous, but 
also uniformly distributed, except at and near the body margin, 
where they are closely crowded, with numerous large circular 
multilocular disk pores in a heavy collar around the genital 
opening and in transverse bands on three segments anterior to 
genital collar, and quinquelocular disk pores of approximately 
the same size as the genital pores in numbers at the spiracles; 
no other pore sorts located; dorsallv and ventrally with numbers 
of scattered, slender, faintly lanceolate setae; with a single large 
quadrate median ventral cicatrix posterior to the hind legs. 
Preadult female . — In general resembling the adult quite 
closely, differing in the smaller size, the 7-segmented antennae, 
the smaller and less developed spiracles, the reduced numbers of 
spines, setae and pores in the cerarii and the very great reduction 
in the number of ventral disk pores. 
No other stages have been available for examination. 
This species has been described from four mounted and a 
few unmounted specimens received from Dr. Wheeler with the 
following note: 
“In the cavities of the stems of Triplaris surinamensis 
Chanc. with Pseudomyrma sp. nov. (allied to Ps. triplaridis 
Forel.)” 
The types are in the U. S. National Collection of Coccidae. 
GENUS PI PERSIA SIGN ORE T 
This genus is at present merely a convenient dumping 
ground for those species of mealybugs having the number of 
antennal segments reduced and the cerarii usually much reduced 
in number or even wanting. Until the genera of the true mealy- 
bugs arc based on an adequate morphological foundation, little 
else can be done with apparently new species than to place them 
in some such convenient genus as this one, and it is on this 
basis that the two species described below have been assigned 
to a position here. 
