1922 ] On some Trophobiotic Coccidce from British Guiana 147 
collar, the usual shape of the plates, from above, half ovate, 
but varying quite a little according to the pressure on the plate; 
each plate quite deep, with about 15 to 17 scattered seta 1 : dorsally 
and apically, these frequently broken off, an indeterminate 
number, apparently three, of ventral ridge seta, two fringe seta 
placed close together at center of fold in membrane, and three 
to five hypopygial seta along middle of membrane beneath 
iringe seta; anal ring small, oval, with ten small seta and some 
large pores. 
Larva. — Stout oval, flat, average length 82 lg, average 
width 571/x; antenna slender, elongate, 6-segmented, the third 
very long; legs slender, claw without denticle, digitules slender, 
those of claw slightly knobbed, those of tarsus hair-like; spi- 
racular spines occuring singly, stout, somewhat tapering; on 
abdomen, at least, with two dorsal rows of minute pores on 
each side of the body; ventrally with a submarginal row of 
relatively long hairs and a similar parallel row some distance 
in from the margin: anal plates elongate, each with a long apical 
seta, two small subapical setse and a subbasal seta; with one 
pair of fringe setre. 
This species has been described from the following lots of 
specimens: In branches of Inga laurina, Mayaguez, Porto Rico, 
March, 1915, collected by R. H. Van Zwaluwenburg (holotvpe 
and paratypes); on “guama”, San-Juan, P. R., Nov. 1912, col- 
lected by W. V. Tower (paratypes); beneath bark of Ilemato- 
xylon campechianum (logw r ood), Botanic Garden, St. George, 
Grenada, Nov. 13, 1918 (A-971) and Nov. 19, 1918 (A-1021), 
Friendship Estate, Tobago Island, Nov. 7, 1918 (A-912), and 
on the Savanna, Port-of-Spain, Trinidad, Nov. 23, 1918, all 
collected by Harold Morrison (paratypes), and in the cavities 
of the stems of Triplaris surinamensis Chanc. with Pseudomyrma 
sp. nov. (allied to Ps. triplaridis Forel), collected by Dr. W. M. 
Wheeler at Camaria, British Guiana (paratypes). In all ins- 
tances where information is available, the species is reported as 
receiving the attention of some species of ant. 
The types are in the U. S. National Collection of Coccidse. 
